{"title":"Yamaha YZ250F (2001–2004) Parts – Engine Kits, Exhausts \u0026 Upgrades","description":"\u003ch1 data-start=\"175\" data-end=\"234\"\u003eYamaha YZ250F (2001–2004) Parts \u0026amp; Performance Upgrades\u003c\/h1\u003e\n\u003cp data-start=\"236\" data-end=\"576\"\u003eBring your early-generation \u003cstrong data-start=\"264\" data-end=\"274\"\u003eYZ250F\u003c\/strong\u003e back to life with premium rebuild and performance parts from trusted brands like \u003cstrong data-start=\"356\" data-end=\"374\"\u003eCylinder Works\u003c\/strong\u003e, \u003cstrong data-start=\"376\" data-end=\"388\"\u003eHot Rods\u003c\/strong\u003e, \u003cstrong data-start=\"390\" data-end=\"400\"\u003eVertex\u003c\/strong\u003e, \u003cstrong data-start=\"402\" data-end=\"413\"\u003eCometic\u003c\/strong\u003e, and \u003cstrong data-start=\"419\" data-end=\"426\"\u003eFMF\u003c\/strong\u003e. Whether you’re restoring stock reliability or chasing race-ready power, this collection has everything to keep your 250F running crisp and strong.\u003c\/p\u003e","products":[{"product_id":"cylinder-works-77mm-kit-yamaha-yz250f-wr250f-2001-2004","title":"Cylinder Works 77mm Kit – Yamaha YZ250F \/ WR250F (2001–2004)","description":"\u003ch1 data-start=\"0\" data-end=\"90\"\u003eCylinder Works 77mm Standard Bore Cylinder Kit – Fits Yamaha YZ250F \u0026amp; WR250F (2001–2004)\u003c\/h1\u003e\n\u003cp data-start=\"92\" data-end=\"426\"\u003eBring your early-generation Yamaha 250F engine back to factory performance with the \u003cstrong data-start=\"176\" data-end=\"230\"\u003eCylinder Works 77.00 mm Standard Bore Cylinder Kit\u003c\/strong\u003e. Designed as a direct OEM-style replacement, this complete top-end rebuild kit includes everything needed to restore compression, durability, and reliability—no replating or machining required.\u003c\/p\u003e\n\u003chr data-start=\"428\" data-end=\"431\"\u003e\n\u003ch2 data-start=\"433\" data-end=\"453\"\u003e✅ What’s Included\u003c\/h2\u003e\n\u003cul data-start=\"454\" data-end=\"622\"\u003e\n\u003cli data-start=\"454\" data-end=\"509\"\u003e\n\u003cp data-start=\"456\" data-end=\"509\"\u003e77.00 mm \u003cstrong data-start=\"465\" data-end=\"507\"\u003eNickel–Silicon Carbide plated cylinder\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"510\" data-end=\"572\"\u003e\n\u003cp data-start=\"512\" data-end=\"572\"\u003e\u003cstrong data-start=\"512\" data-end=\"533\"\u003eVertex piston kit\u003c\/strong\u003e (piston, rings, wrist pin, circlips)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"573\" data-end=\"622\"\u003e\n\u003cp data-start=\"575\" data-end=\"622\"\u003e\u003cstrong data-start=\"575\" data-end=\"597\"\u003eTop-end gasket set\u003c\/strong\u003e for a complete rebuild\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"624\" data-end=\"627\"\u003e\n\u003ch2 data-start=\"629\" data-end=\"647\"\u003e⚙️ Key Features\u003c\/h2\u003e\n\u003cul data-start=\"648\" data-end=\"1017\"\u003e\n\u003cli data-start=\"648\" data-end=\"720\"\u003e\n\u003cp data-start=\"650\" data-end=\"720\"\u003e\u003cstrong data-start=\"650\" data-end=\"675\"\u003eDirect bolt-on design\u003c\/strong\u003e — ready to install, no replating necessary\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"721\" data-end=\"816\"\u003e\n\u003cp data-start=\"723\" data-end=\"816\"\u003e\u003cstrong data-start=\"723\" data-end=\"757\"\u003eNickel–Silicon Carbide coating\u003c\/strong\u003e provides exceptional heat resistance and wear protection\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"817\" data-end=\"900\"\u003e\n\u003cp data-start=\"819\" data-end=\"900\"\u003e\u003cstrong data-start=\"819\" data-end=\"848\"\u003eMatched Vertex piston kit\u003c\/strong\u003e ensures quiet operation and long-term performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"901\" data-end=\"971\"\u003e\n\u003cp data-start=\"903\" data-end=\"971\"\u003e\u003cstrong data-start=\"903\" data-end=\"931\"\u003e12.7:1 compression ratio\u003c\/strong\u003e for strong, responsive power delivery\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"972\" data-end=\"1017\"\u003e\n\u003cp data-start=\"974\" data-end=\"1017\"\u003e\u003cstrong data-start=\"974\" data-end=\"993\"\u003eMade in the USA\u003c\/strong\u003e to exacting standards\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote data-start=\"1019\" data-end=\"1126\"\u003e\n\u003cp data-start=\"1021\" data-end=\"1126\"\u003e⚠️ \u003cem data-start=\"1024\" data-end=\"1126\"\u003eFor closed-course competition use only. Not legal for use on public lands or highways in California.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr data-start=\"1128\" data-end=\"1131\"\u003e\n\u003ch2 data-start=\"1133\" data-end=\"1146\"\u003e📦 Fitment\u003c\/h2\u003e\n\u003cp data-start=\"1147\" data-end=\"1179\"\u003e\u003cstrong data-start=\"1147\" data-end=\"1177\"\u003eYamaha Models (2001–2004):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1180\" data-end=\"1201\"\u003e\n\u003cli data-start=\"1180\" data-end=\"1190\"\u003e\n\u003cp data-start=\"1182\" data-end=\"1190\"\u003eYZ250F\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1191\" data-end=\"1201\"\u003e\n\u003cp data-start=\"1193\" data-end=\"1201\"\u003eWR250F\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1203\" data-end=\"1206\"\u003e\n\u003ch2 data-start=\"1208\" data-end=\"1228\"\u003e🛡️ Warranty Info\u003c\/h2\u003e\n\u003cp data-start=\"1229\" data-end=\"1366\"\u003eBacked by Cylinder Works’ limited manufacturer warranty.\u003cbr data-start=\"1285\" data-end=\"1288\"\u003eProfessional installation is recommended for proper performance and longevity.\u003c\/p\u003e\n\u003chr data-start=\"1368\" data-end=\"1371\"\u003e\n\u003cp data-start=\"1373\" data-end=\"1475\"\u003e💲 \u003cstrong data-start=\"1376\" data-end=\"1397\"\u003eSuggested Retail:\u003c\/strong\u003e $694.95\u003cbr data-start=\"1405\" data-end=\"1408\"\u003e🔢 \u003cstrong data-start=\"1411\" data-end=\"1419\"\u003eSKU:\u003c\/strong\u003e 0931-0278 \/ 20002-K01\u003cbr data-start=\"1441\" data-end=\"1444\"\u003e🏷️ \u003cstrong data-start=\"1448\" data-end=\"1458\"\u003eBrand:\u003c\/strong\u003e Cylinder Works\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47399380746465,"sku":"0931-0278","price":750.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/cylinder-works-77mm-kit-yamaha-yz250f-wr250f-20012004-7751465.jpg?v=1763566293"},{"product_id":"hot-cams-cam-chain-92rh2010-x114-links-kx250f-rm-z250-yz250f","title":"Hot Cams Cam Chain – Kawasaki KX250F (2004–2016) \/ Suzuki RM-Z250 (2004–2024) \/ Yamaha YZ250F \u0026 WR250F (2001–2013)","description":"\u003ch1 data-start=\"169\" data-end=\"308\"\u003eHot Cams Cam Chain – 92RH2010 x 114 Links – Kawasaki KX250F (2004–2016) \/ Suzuki RM-Z250 (2004–2024) \/ Yamaha YZ250F | WR250F (2001–2013)\u003c\/h1\u003e\n\u003ch2 data-start=\"310\" data-end=\"326\"\u003eDescription\u003c\/h2\u003e\n\u003cp data-start=\"327\" data-end=\"524\"\u003eKeep your engine timing precise with the \u003cstrong data-start=\"368\" data-end=\"406\"\u003eHot Cams Cam Chain (HC92RH2010114)\u003c\/strong\u003e — a high-performance \u003cstrong data-start=\"428\" data-end=\"448\"\u003esilent cam chain\u003c\/strong\u003e engineered to exceed OEM specifications for strength, fit, and longevity.\u003c\/p\u003e\n\u003cp data-start=\"526\" data-end=\"877\"\u003eWhether you’re rebuilding your \u003cstrong data-start=\"557\" data-end=\"567\"\u003eKX250F\u003c\/strong\u003e, \u003cstrong data-start=\"569\" data-end=\"580\"\u003eRM-Z250\u003c\/strong\u003e, \u003cstrong data-start=\"582\" data-end=\"592\"\u003eYZ250F\u003c\/strong\u003e, or \u003cstrong data-start=\"597\" data-end=\"607\"\u003eWR250F\u003c\/strong\u003e, this heat-treated cam chain offers reduced friction, superior wear resistance, and reliable timing stability across the full RPM range. Designed for racers and weekend riders alike, it’s a \u003cstrong data-start=\"798\" data-end=\"824\"\u003edirect OEM replacement\u003c\/strong\u003e that installs with factory sprockets and tensioners.\u003c\/p\u003e\n\u003ch2 data-start=\"879\" data-end=\"899\"\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp data-start=\"900\" data-end=\"1026\"\u003e✅ (1) Hot Cams Cam Chain – 92RH2010 x 114 Links\u003cbr data-start=\"947\" data-end=\"950\"\u003e✅ Pre-lubricated and ready to install\u003cbr data-start=\"987\" data-end=\"990\"\u003e✅ Fits OEM cam gears and tensioner\u003c\/p\u003e\n\u003ch2 data-start=\"1028\" data-end=\"1040\"\u003eFitment\u003c\/h2\u003e\n\u003cp data-start=\"1041\" data-end=\"1051\"\u003e📦 Fits:\u003c\/p\u003e\n\u003cul data-start=\"1052\" data-end=\"1174\"\u003e\n\u003cli data-start=\"1052\" data-end=\"1082\"\u003e\n\u003cp data-start=\"1054\" data-end=\"1082\"\u003e2004 – 2024 Suzuki RM-Z250\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1083\" data-end=\"1114\"\u003e\n\u003cp data-start=\"1085\" data-end=\"1114\"\u003e2004 – 2016 Kawasaki KX250F\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1115\" data-end=\"1144\"\u003e\n\u003cp data-start=\"1117\" data-end=\"1144\"\u003e2001 – 2013 Yamaha YZ250F\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1145\" data-end=\"1174\"\u003e\n\u003cp data-start=\"1147\" data-end=\"1174\"\u003e2001 – 2013 Yamaha WR250F\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1176\" data-end=\"1204\"\u003eReplaces OEM Part Numbers:\u003c\/p\u003e\n\u003cul data-start=\"1205\" data-end=\"1297\"\u003e\n\u003cli data-start=\"1205\" data-end=\"1229\"\u003e\n\u003cp data-start=\"1207\" data-end=\"1229\"\u003e12760-10H00 (Suzuki)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1230\" data-end=\"1269\"\u003e\n\u003cp data-start=\"1232\" data-end=\"1269\"\u003e92057-0030 \/ K92057-0030 (Kawasaki)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1270\" data-end=\"1297\"\u003e\n\u003cp data-start=\"1272\" data-end=\"1297\"\u003e94591-53114-00 (Yamaha)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1299\" data-end=\"1316\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1317\" data-end=\"1613\"\u003e\n\u003cli data-start=\"1317\" data-end=\"1372\"\u003e\n\u003cp data-start=\"1319\" data-end=\"1372\"\u003e\u003cstrong data-start=\"1319\" data-end=\"1342\"\u003eSilent chain design\u003c\/strong\u003e reduces noise and vibration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1373\" data-end=\"1447\"\u003e\n\u003cp data-start=\"1375\" data-end=\"1447\"\u003e\u003cstrong data-start=\"1375\" data-end=\"1403\"\u003eHeat-treated steel links\u003c\/strong\u003e for superior strength and wear resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1448\" data-end=\"1508\"\u003e\n\u003cp data-start=\"1450\" data-end=\"1508\"\u003eExceeds \u003cstrong data-start=\"1458\" data-end=\"1486\"\u003eOEM specs and tolerances\u003c\/strong\u003e for timing accuracy\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1509\" data-end=\"1558\"\u003e\n\u003cp data-start=\"1511\" data-end=\"1558\"\u003eDesigned for both \u003cstrong data-start=\"1529\" data-end=\"1552\"\u003estreet and off-road\u003c\/strong\u003e use\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1559\" data-end=\"1613\"\u003e\n\u003cp data-start=\"1561\" data-end=\"1613\"\u003eLong-lasting performance under high-RPM conditions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1615\" data-end=\"1720\"\u003e\u003cstrong data-start=\"1615\" data-end=\"1631\"\u003eChain Model:\u003c\/strong\u003e 92RH2010\u003cbr data-start=\"1640\" data-end=\"1643\"\u003e\u003cstrong data-start=\"1643\" data-end=\"1658\"\u003eLink Count:\u003c\/strong\u003e 114\u003cbr data-start=\"1662\" data-end=\"1665\"\u003e\u003cstrong data-start=\"1665\" data-end=\"1678\"\u003eMaterial:\u003c\/strong\u003e Heat-treated steel\u003cbr data-start=\"1697\" data-end=\"1700\"\u003e\u003cstrong data-start=\"1700\" data-end=\"1711\"\u003eWeight:\u003c\/strong\u003e 0.4 lb\u003c\/p\u003e\n\u003ch2 data-start=\"1722\" data-end=\"1740\"\u003eWarranty Info\u003c\/h2\u003e\n\u003cp data-start=\"1741\" data-end=\"1859\"\u003eBacked by \u003cstrong data-start=\"1751\" data-end=\"1793\"\u003eHot Cams Limited Manufacturer Warranty\u003c\/strong\u003e.\u003cbr data-start=\"1794\" data-end=\"1797\"\u003eTechnical and installation support available through Hot Cams.\u003c\/p\u003e\n\u003ch2 data-start=\"1861\" data-end=\"1877\"\u003ePrice \u0026amp; SKU\u003c\/h2\u003e\n\u003cp data-start=\"1878\" data-end=\"2024\"\u003e💲 \u003cstrong data-start=\"1881\" data-end=\"1898\"\u003eRetail Price:\u003c\/strong\u003e $50.95\u003cbr data-start=\"1905\" data-end=\"1908\"\u003e\u003cstrong data-start=\"1908\" data-end=\"1916\"\u003eSKU:\u003c\/strong\u003e 0925-0845 \/ HC92RH2010114\u003cbr data-start=\"1942\" data-end=\"1945\"\u003e\u003cstrong data-start=\"1945\" data-end=\"1975\"\u003eEstimated Shipping Weight:\u003c\/strong\u003e 0.4 lb\u003cbr data-start=\"1982\" data-end=\"1985\"\u003e\u003cstrong data-start=\"1985\" data-end=\"1998\"\u003eHandling:\u003c\/strong\u003e Ships next business day\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47421375611105,"sku":"0925-0845","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/hot-cams-cam-chain-kawasaki-kx250f-20042016-suzuki-rm-z250-20042024-yamaha-yz250f-wr250f-20012013-5003322.jpg?v=1763566377"},{"product_id":"vertex-wrench-rabbit-engine-rebuild-kit-yz250f-2003-2004","title":"Vertex Wrench Rabbit Engine Rebuild Kit – YZ250F (2003–2004)","description":"\u003ch1 data-start=\"229\" data-end=\"307\"\u003eVertex Wrench Rabbit Complete Engine Rebuild Kit – Yamaha YZ250F (2003–2004)\u003c\/h1\u003e\n\u003ch2 data-start=\"309\" data-end=\"325\"\u003eDescription\u003c\/h2\u003e\n\u003cp data-start=\"326\" data-end=\"616\"\u003eBring your early-generation YZ250F back to life with the \u003cstrong data-start=\"383\" data-end=\"449\"\u003eVertex \/ Wrench Rabbit Complete Engine Rebuild Kit (WR101-083)\u003c\/strong\u003e. This all-in-one 4-stroke rebuild kit provides every precision-matched component needed to fully restore your engine’s performance, reliability, and power delivery.\u003c\/p\u003e\n\u003cp data-start=\"618\" data-end=\"808\"\u003eBuilt around proven \u003cstrong data-start=\"638\" data-end=\"650\"\u003eHot Rods\u003c\/strong\u003e and \u003cstrong data-start=\"655\" data-end=\"665\"\u003eVertex\u003c\/strong\u003e internals, this package eliminates guesswork—perfect for riders rebuilding high-hour race engines or doing full bottom- and top-end overhauls.\u003c\/p\u003e\n\u003ch2 data-start=\"810\" data-end=\"830\"\u003eWhat’s Included\u003c\/h2\u003e\n\u003cp data-start=\"831\" data-end=\"1480\"\u003e✅ \u003cstrong data-start=\"833\" data-end=\"865\"\u003eHot Rods Crankshaft Assembly\u003c\/strong\u003e – trued, balanced, and ready for installation\u003cbr data-start=\"911\" data-end=\"914\"\u003e✅ \u003cstrong data-start=\"916\" data-end=\"937\"\u003eVertex Piston Kit\u003c\/strong\u003e – piston, rings, wrist pin, and clips\u003cbr data-start=\"975\" data-end=\"978\"\u003e✅ \u003cstrong data-start=\"980\" data-end=\"1010\"\u003eComplete Engine Gasket Kit\u003c\/strong\u003e – full top and bottom coverage\u003cbr data-start=\"1041\" data-end=\"1044\"\u003e✅ \u003cstrong data-start=\"1046\" data-end=\"1062\"\u003eOil Seal Kit\u003c\/strong\u003e – high-temperature seals for crank and transmission\u003cbr data-start=\"1114\" data-end=\"1117\"\u003e✅ \u003cstrong data-start=\"1119\" data-end=\"1146\"\u003eMain Bearing \u0026amp; Seal Kit\u003c\/strong\u003e – OEM-spec bearings for smooth operation\u003cbr data-start=\"1187\" data-end=\"1190\"\u003e✅ \u003cstrong data-start=\"1192\" data-end=\"1218\"\u003eWater Pump Rebuild Kit\u003c\/strong\u003e – includes impeller bearings and seals\u003cbr data-start=\"1257\" data-end=\"1260\"\u003e✅ \u003cstrong data-start=\"1262\" data-end=\"1290\"\u003eTransmission Bearing Kit\u003c\/strong\u003e – all gearbox bearings included\u003cbr data-start=\"1322\" data-end=\"1325\"\u003e✅ \u003cstrong data-start=\"1327\" data-end=\"1362\"\u003eCountershaft Bushing \u0026amp; Seal Kit\u003c\/strong\u003e\u003cbr data-start=\"1362\" data-end=\"1365\"\u003e✅ \u003cstrong data-start=\"1367\" data-end=\"1380\"\u003eCam Chain\u003c\/strong\u003e – precision-built timing chain for long life\u003cbr data-start=\"1425\" data-end=\"1428\"\u003e✅ \u003cstrong data-start=\"1430\" data-end=\"1478\"\u003eCounter-Balancer Bearings (where applicable)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1482\" data-end=\"1550\"\u003eEverything comes matched for professional-grade fit and performance.\u003c\/p\u003e\n\u003ch2 data-start=\"1552\" data-end=\"1564\"\u003eFitment\u003c\/h2\u003e\n\u003cp data-start=\"1565\" data-end=\"1596\"\u003e📦 Fits the following models:\u003c\/p\u003e\n\u003cul data-start=\"1597\" data-end=\"1630\"\u003e\n\u003cli data-start=\"1597\" data-end=\"1630\"\u003e\n\u003cp data-start=\"1599\" data-end=\"1630\"\u003e\u003cstrong data-start=\"1599\" data-end=\"1628\"\u003eYamaha YZ250F (2003–2004)\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 data-start=\"1632\" data-end=\"1649\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1650\" data-end=\"1969\"\u003e\n\u003cli data-start=\"1650\" data-end=\"1713\"\u003e\n\u003cp data-start=\"1652\" data-end=\"1713\"\u003eComplete \u003cstrong data-start=\"1661\" data-end=\"1683\"\u003etop and bottom end\u003c\/strong\u003e rebuild solution in one box\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1714\" data-end=\"1796\"\u003e\n\u003cp data-start=\"1716\" data-end=\"1796\"\u003eComponents by \u003cstrong data-start=\"1730\" data-end=\"1740\"\u003eVertex\u003c\/strong\u003e and \u003cstrong data-start=\"1745\" data-end=\"1757\"\u003eHot Rods\u003c\/strong\u003e, engineered to exceed OEM durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1797\" data-end=\"1860\"\u003e\n\u003cp data-start=\"1799\" data-end=\"1860\"\u003eIdeal for performance restoration or preventive maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1861\" data-end=\"1915\"\u003e\n\u003cp data-start=\"1863\" data-end=\"1915\"\u003ePerfect for race bikes or high-hour trail machines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1916\" data-end=\"1969\"\u003e\n\u003cp data-start=\"1918\" data-end=\"1969\"\u003eDirect bolt-in installation—no machining required\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1971\" data-end=\"2048\"\u003e\u003cstrong data-start=\"1971\" data-end=\"1988\"\u003eDisplacement:\u003c\/strong\u003e 250 cc\u003cbr data-start=\"1995\" data-end=\"1998\"\u003e\u003cstrong data-start=\"1998\" data-end=\"2014\"\u003eEngine Type:\u003c\/strong\u003e 4-Stroke\u003cbr data-start=\"2023\" data-end=\"2026\"\u003e\u003cstrong data-start=\"2026\" data-end=\"2037\"\u003eWeight:\u003c\/strong\u003e 13.05 lb\u003c\/p\u003e\n\u003ch2 data-start=\"2050\" data-end=\"2068\"\u003eWarranty Info\u003c\/h2\u003e\n\u003cp data-start=\"2069\" data-end=\"2223\"\u003e🛡️ Backed by \u003cstrong data-start=\"2083\" data-end=\"2139\"\u003eVertex \/ Wrench Rabbit Limited Manufacturer Warranty\u003c\/strong\u003e\u003cbr data-start=\"2139\" data-end=\"2142\"\u003eAll components meet or exceed OEM quality. Professional installation recommended.\u003c\/p\u003e\n\u003ch2 data-start=\"2225\" data-end=\"2241\"\u003ePrice \u0026amp; SKU\u003c\/h2\u003e\n\u003cp data-start=\"2242\" data-end=\"2389\"\u003e💲 \u003cstrong data-start=\"2245\" data-end=\"2262\"\u003eRetail Price:\u003c\/strong\u003e $1,071.95\u003cbr data-start=\"2272\" data-end=\"2275\"\u003e\u003cstrong data-start=\"2275\" data-end=\"2283\"\u003eSKU:\u003c\/strong\u003e 0903-1018 \/ WR101-083\u003cbr data-start=\"2305\" data-end=\"2308\"\u003e\u003cstrong data-start=\"2308\" data-end=\"2338\"\u003eEstimated Shipping Weight:\u003c\/strong\u003e 13.05 lb\u003cbr data-start=\"2347\" data-end=\"2350\"\u003e\u003cstrong data-start=\"2350\" data-end=\"2363\"\u003eHandling:\u003c\/strong\u003e Ships next business day\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47421694542049,"sku":"0903-1018","price":1157.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/vertex-wrench-rabbit-engine-rebuild-kit-yz250f-20032004-3135257.png?v=1763566225"},{"product_id":"83mm-290cc-big-bore-cylinder-kit-yz250f-01-07-wr250f-01-12-athena","title":"Yamaha YZ250F 01–07 \u0026 WR250F 01–12 83mm 290cc Big Bore Kit – Athena (2001-2012)","description":"\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003eTransform your YZ250F\/WR250F into a 290cc torque monster. Bolt-on install, no machining—just explosive mid-range power and race-proven durability.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003eThe Athena P400485100012 is a complete 83mm big bore race kit that takes 2001–2007 Yamaha YZ250F and 2001–2012 Yamaha WR250F from 249cc to 290cc (+41cc). Nickel-carbide cylinder, Factory Works porting, 12.5:1 forged piston, hard-anodized power valves. Cylinder head not included.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e83mm Nickel-Carbide Cylinder – Factory Works porting\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eForged Piston Kit – 12.5:1 compression, molybdenum coating, rings, pin, clips\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eHard-Anodized Power Valves – high-flow, non-OEM\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAthena Top-End Gasket Set – head\/base gaskets, seals, hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e83mm big bore — +41cc (249cc → 290cc)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eNickel-carbide plating — extreme durability, low friction\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eLarger water jackets — superior cooling under race load\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eFactory Works porting — max airflow, pro-tuned performance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e12.5:1 forged piston — explosive mid-top power\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eHard-anodized power valves — faster response, longer life\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eMade in Italy — race-proven precision\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2001–2007 Yamaha YZ250F\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003e2001–2012 Yamaha WR250F\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body whitespace-normal break-words\"\u003e\u003cstrong\u003eInstall Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc space-y-2.5 pl-7\"\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eReuses OEM cylinder head (not included)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eAdvanced install — engine disassembly required\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words\"\u003eJetting\/tuning recommended for optimal performance\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47511583228129,"sku":"0931-0024","price":1142.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/yamaha-yz250f-0107-wr250f-0112-83mm-290cc-big-bore-kit-athena-5209134.png?v=1764104945"},{"product_id":"yamaha-yz250f-01-07-wr250f-01-12-83mm-290cc-big-bore-kit-athena","title":"Yamaha YZ250F 01–07 \u0026 WR250F 01–12 83mm 290cc Big Bore Kit – Athena (2001-2012)","description":"\u003cp\u003e\u003cstrong\u003e✓ Fits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2001-2012 Yamaha YZ250F\u003c\/li\u003e\n\u003cli\u003e2001-2012 Yamaha WR250F\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e✓ Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e83mm Nickel-Carbide Cylinder – Factory Works porting\u003c\/li\u003e\n\u003cli\u003eHard-Anodized Power Valves – high-flow, non-OEM\u003c\/li\u003e\n\u003cli\u003e83mm big bore — +41cc (249cc → 290cc)\u003c\/li\u003e\n\u003cli\u003eNickel-carbide plating — extreme durability, low friction\u003c\/li\u003e\n\u003cli\u003eLarger water jackets — superior cooling under race load\u003c\/li\u003e\n\u003cli\u003eFactory Works porting — max airflow, pro-tuned performance\u003c\/li\u003e\n\u003cli\u003e12.5:1 forged piston — explosive mid-top power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e✓ What's Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eForged Piston Kit – 12.5:1 compression, molybdenum coating, rings, pin, clips\u003c\/li\u003e\n\u003cli\u003eAthena Top-End Gasket Set – head\/base gaskets, seals, hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips fast from DuneGoonShop!\u003c\/p\u003e","brand":"WPS","offers":[{"title":"Default Title","offer_id":47525158748385,"sku":"68-4890","price":1057.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/yamaha-yz250f-0107-wr250f-0112-83mm-290cc-big-bore-kit-athena-5209134.png?v=1764104945"},{"product_id":"cylinder-works-big-bore-gasket-kit-yamaha-yz250f-wr250f-2001-2013","title":"Cylinder Works Big Bore Gasket Kit - Yamaha YZ250F \/ WR250F (2001-2013)","description":"\u003ch2\u003eCylinder Works Big Bore Gasket Kit - Yamaha YZ250F \/ WR250F\u003c\/h2\u003e\n\n\u003cp\u003eComplete top end gasket kit for Cylinder Works big bore cylinders. Designed for +3mm overbore applications on Yamaha 250F engines. Made in the USA.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eComplete top end gasket set\u003c\/li\u003e\n\u003cli\u003eHead gasket\u003c\/li\u003e\n\u003cli\u003eBase gasket\u003c\/li\u003e\n\u003cli\u003eAll required seals and O-rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePiston, rings, and cylinder sold separately.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cp\u003eDirect fit for Cylinder Works big bore kits. No machine work required. Gaskets are precision cut for a perfect seal. High-quality materials handle extreme heat and pressure. Made in USA by Cylinder Works.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eType: Top End Gasket Kit\u003c\/li\u003e\n\u003cli\u003eStyle: Big Bore (+3mm)\u003c\/li\u003e\n\u003cli\u003eEngine Type: 4-Stroke\u003c\/li\u003e\n\u003cli\u003eMaterial: Nikasil compatible\u003c\/li\u003e\n\u003cli\u003eWeight: 0.16 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eYamaha YZ250F:\u003c\/strong\u003e 2001-2013\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYamaha WR250F:\u003c\/strong\u003e 2001-2013\u003c\/p\u003e\n\n\u003ch3\u003eWhy Cylinder Works?\u003c\/h3\u003e\n\n\u003cp\u003eCylinder Works is a trusted name in powersports engine components. Their cylinders and gasket kits are manufactured in the USA to strict tolerances. Used by professional racers and weekend riders who demand reliability.\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47656339865825,"sku":"0934-1523","price":93.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/cylinder-works-big-bore-gasket-kit-yamaha-yz250f-wr250f-2001-2013-9808684.png?v=1765317547"},{"product_id":"cylinder-works-high-compression-cylinder-kit-77mm-yamaha-yz250f-wr250f-2001-2013","title":"Cylinder Works High Compression Cylinder Kit 77mm - Yamaha YZ250F \/ WR250F (2001-2013)","description":"\u003ch2\u003eCylinder Works High Compression Cylinder Kit 77mm - Yamaha YZ250F \/ WR250F\u003c\/h2\u003e\n\n\u003cp\u003eComplete high compression cylinder kit for your YZ250F or WR250F. Higher compression ratio delivers more power and improved throttle response. Includes Vertex matched piston, Nikasil plated cylinder, and full gasket kit. Direct bolt-on replacement with no machine work required. Made in the USA.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eCylinder Works 77mm high compression cylinder\u003c\/li\u003e\n\u003cli\u003eVertex matched piston\u003c\/li\u003e\n\u003cli\u003ePiston rings\u003c\/li\u003e\n\u003cli\u003eWrist pin and clips\u003c\/li\u003e\n\u003cli\u003eComplete top end gasket kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cp\u003eHigh compression design for increased power output. Nikasil plated cylinder for long life and excellent heat transfer. Vertex piston ensures longevity and reduced engine noise. Looks virtually identical to OEM. Direct bolt-on installation with no machine work required.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eBore Size: 77mm (standard)\u003c\/li\u003e\n\u003cli\u003eDisplacement: 249cc\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 13.5:1 (High Compression)\u003c\/li\u003e\n\u003cli\u003eEngine Type: 4-Stroke\u003c\/li\u003e\n\u003cli\u003eMaterial: Aluminum with Nikasil plating\u003c\/li\u003e\n\u003cli\u003eWeight: 3.33 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eYamaha YZ250F:\u003c\/strong\u003e 2001-2007\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYamaha WR250F:\u003c\/strong\u003e 2001-2013\u003c\/p\u003e\n\n\u003ch3\u003eWhy Cylinder Works?\u003c\/h3\u003e\n\n\u003cp\u003eCylinder Works is a trusted name in powersports engine components. Their cylinders and kits are manufactured in the USA to strict tolerances. Used by professional racers and weekend riders who demand reliability.\u003c\/p\u003e\n\n\u003ch3\u003eOEM Reference Numbers\u003c\/h3\u003e\n\n\u003cp\u003e5NL111810000, 5NL113110000, 5NL113510000, 5NL116030000, 5NL116310000\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47656444395745,"sku":"0931-0296","price":750.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/Screenshot2025-12-08171959.png?v=1765243241"},{"product_id":"wiseco-garage-buddy-complete-4-stroke-engine-rebuild-kit-yamaha-yz250f-2003-2004-77-00mm-bore","title":"Wiseco Garage Buddy Complete 4-Stroke Engine Rebuild Kit - Yamaha YZ250F (2003-2004) - 77.00mm Bore","description":"\u003ch2\u003eWiseco Garage Buddy Complete 4-Stroke Engine Rebuild Kit - Yamaha YZ250F\u003c\/h2\u003e\n\n\u003cp\u003eThe Wiseco Garage Buddy kit is the ultimate complete engine rebuild solution featuring premium forged pistons and everything you need in one box. This professional-grade kit includes top and bottom end components, plus a Wiseco hour meter to track your next rebuild interval!\u003c\/p\u003e\n\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft Assembly\u003c\/strong\u003e - Designed and inspected to assure durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiseco Forged Piston Kit (#4872M07700)\u003c\/strong\u003e - Premium 2618 aluminum alloy\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTop End Gasket Set (#W5921)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eBottom End Gasket Set (#WB1038)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eMain Bearing (#B5036)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCam Chain (#CC007)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiseco Hour Meter with Mount (#W8063\/W8062)\u003c\/strong\u003e - Track your engine hours!\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaxima Assembly Lube\u003c\/strong\u003e - Premium assembly lubricant included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003ePremium forged piston kit with stock compression ratio\u003c\/li\u003e\n\u003cli\u003eHigh-quality cam chain included\u003c\/li\u003e\n\u003cli\u003eTop and bottom end components for a complete engine rebuild\u003c\/li\u003e\n\u003cli\u003eCrankshaft and rod assembly designed and inspected for durability\u003c\/li\u003e\n\u003cli\u003eMain bearings, seals, and gaskets included\u003c\/li\u003e\n\u003cli\u003eWiseco hour meter and bracket included - know when your next rebuild is due!\u003c\/li\u003e\n\u003cli\u003eMaxima assembly lube for proper break-in\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePiston Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eBore Size: 77.00 mm (Standard)\u003c\/li\u003e\n\u003cli\u003ePiston Diameter: 76.95 mm\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 12.7:1\u003c\/li\u003e\n\u003cli\u003eMaterial: 2618 Aluminum Alloy\u003c\/li\u003e\n\u003cli\u003eSkirt Coating: Non-Coated\u003c\/li\u003e\n\u003cli\u003eStyle: Forged Series Piston\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eEngine Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eDisplacement: 250cc\u003c\/li\u003e\n\u003cli\u003eEngine Type: 4-Stroke\u003c\/li\u003e\n\u003cli\u003eWeight: 11.25 lbs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eYamaha:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYZ250F: 2003-2004\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Wiseco Garage Buddy?\u003c\/h3\u003e\n\n\u003cp\u003eWiseco is the gold standard in forged pistons. The Garage Buddy kit combines their legendary piston quality with all the components needed for a complete rebuild. The included hour meter is a game-changer - you'll always know exactly when your next service is due. No more guessing!\u003c\/p\u003e\n\n\u003ch3\u003eAbout Wiseco Forged Pistons\u003c\/h3\u003e\n\n\u003cp\u003eWiseco's forged 2618 aluminum alloy pistons are designed for high-performance applications. Forged pistons are stronger and more durable than cast pistons, making them ideal for racing and aggressive riding.\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47692000657633,"sku":"0903-1527","price":889.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/wiseco-garage-buddy-complete-4-stroke-engine-rebuild-kit-yamaha-yz250f-2003-2004-7700mm-bore-9121299.png?v=1765751765"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/collections\/yamaha-yz250f-20012004-parts-engine-kits-exhausts-upgrades-5887459.webp?v=1763566146","url":"https:\/\/dunegoonshop.com\/collections\/yamaha-yz250f-2001-2004-parts-engine-kits-exhausts-upgrades.oembed","provider":"Dune Goons","version":"1.0","type":"link"}