{"product_id":"athena-big-bore-cylinder-kit-490cc-suzuki-rmz450-2005-2006","title":"Athena Big Bore Cylinder Kit 490cc - Suzuki RMZ450 (2005-2006)","description":"\u003cp\u003eRace-Ready 490cc Big Bore Kit for RMZ450\u003c\/p\u003e\n\u003cp\u003eAthena big bore cylinder kit transforms your RMZ450 into a 490cc powerhouse. Complete race-spec kit with aluminum cylinder, forged piston, and gaskets—massive power gains for competitive racing.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eWhy Athena Big Bore Kits\u003c\/p\u003e\n\u003cp\u003e✓ 490cc displacement (from 450cc)\u003cbr\u003e✓ 100mm bore (oversized)\u003cbr\u003e✓ Aluminum cylinder – nickel carbide coating\u003cbr\u003e✓ Forged piston with moly coating\u003cbr\u003e✓ Enlarged water jackets – better cooling\u003cbr\u003e✓ Complete kit – cylinder, piston, gaskets\u003cbr\u003e✓ Race-proven performance\u003cbr\u003e✓ Professional-grade quality\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eWhat's Included\u003c\/p\u003e\n\u003cp\u003e✓ Aluminum cylinder (100mm bore)\u003cbr\u003e✓ Forged piston with molybdenum coating\u003cbr\u003e✓ Rings, clips, wrist pin\u003cbr\u003e✓ Complete Athena top end gasket set\u003cbr\u003e✓ All required seals and hardware\u003c\/p\u003e\n\u003cp\u003e⚠️ **Does NOT include cylinder head** (uses your OEM head)\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eDoes It Fit?\u003c\/p\u003e\n\u003cp\u003e✅ **Suzuki RMZ450** (2005-2006)\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eQuick Specs\u003c\/p\u003e\n\u003cp\u003ePart #: P400510100006 \/ 0931-0114\u003cbr\u003eBore Size: 100.00mm\u003cbr\u003eDisplacement: 490cc (from 450cc)\u003cbr\u003eCompression Ratio: 12.0:1\u003cbr\u003eCylinder: Aluminum with nickel-carbide coating\u003cbr\u003ePiston: Forged with moly coating\u003cbr\u003eEngine Type: 4-stroke\u003cbr\u003eWeight: 3.73 lbs\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003ePremium Cylinder Construction\u003c\/p\u003e\n\u003cp\u003e**Nickel-Carbide Coating:**\u003cbr\u003eAdvanced cylinder coating for superior wear resistance and heat dissipation\u003c\/p\u003e\n\u003cp\u003e**Enlarged Water Jackets:**\u003cbr\u003eImproved cooling system design handles increased heat from larger displacement\u003c\/p\u003e\n\u003cp\u003e**Aluminum Construction:**\u003cbr\u003eLightweight performance design\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eForged Piston Technology\u003c\/p\u003e\n\u003cp\u003e**Molybdenum Coating:**\u003cbr\u003eReduces friction and wear for longer life\u003c\/p\u003e\n\u003cp\u003e**Forged Construction:**\u003cbr\u003eStronger than cast pistons—handles higher compression and heat\u003c\/p\u003e\n\u003cp\u003e**12.0:1 Compression:**\u003cbr\u003eHigh compression ratio for maximum power\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eRace-Ready Power Gains\u003c\/p\u003e\n\u003cp\u003e**490cc vs. 450cc:**\u003cbr\u003e40cc displacement increase delivers substantial power and torque gains throughout the powerband\u003c\/p\u003e\n\u003cp\u003e**More Displacement = More Power:**\u003cbr\u003e9% increase in displacement means serious horsepower gains\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eComplete Top End Kit\u003c\/p\u003e\n\u003cp\u003e**Everything Included:**\u003cbr\u003e- Cylinder (100mm bore)\u003cbr\u003e- Forged piston\u003cbr\u003e- Rings, pin, clips\u003cbr\u003e- Complete gasket set\u003cbr\u003e- All seals\u003cbr\u003e- All hardware\u003c\/p\u003e\n\u003cp\u003e**Uses OEM cylinder head** (not included)\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eInstallation Notes\u003c\/p\u003e\n\u003cp\u003e⚙️ Difficulty: Advanced\u003cbr\u003e🔧 Tools: Engine tools, torque wrench, measuring tools\u003cbr\u003e🔧 Time: 4-6 hours\u003cbr\u003e👨🔧 Professional installation highly recommended\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003ePro Tip\u003c\/p\u003e\n\u003cp\u003e💡 When installing big bore kit, check all clearances carefully. Break in the engine properly—avoid high RPM and heavy loads for first few hours. Use quality oil and proper fuel mapping for the larger displacement.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eWhat Else You'll Need\u003c\/p\u003e\n\u003cp\u003eFor installation:\u003cbr\u003e- Engine oil and filter\u003cbr\u003e- Coolant\u003cbr\u003e- Fuel mapping\/tuning (highly recommended)\u003cbr\u003e- Valve service (check clearances)\u003cbr\u003e- Timing chain inspection\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eFuel Mapping Required\u003c\/p\u003e\n\u003cp\u003e**Important:**\u003cbr\u003eBig bore requires proper fuel mapping\/ECU tuning for optimal air\/fuel ratio. Stock mapping will run lean—dyno tune recommended.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eEnhanced Cooling Design\u003c\/p\u003e\n\u003cp\u003e**Larger Water Jackets:**\u003cbr\u003eAthena redesigned cylinder with increased coolant capacity to handle extra heat from larger displacement\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eWhy Go Big Bore\u003c\/p\u003e\n\u003cp\u003e**More Power:**\u003cbr\u003eSubstantial increase in horsepower and torque\u003c\/p\u003e\n\u003cp\u003e**Better Acceleration:**\u003cbr\u003eMore displacement = faster acceleration\u003c\/p\u003e\n\u003cp\u003e**Competitive Edge:**\u003cbr\u003eRace-legal power upgrade in many classes\u003c\/p\u003e\n\u003cp\u003e**Bolt-On Power:**\u003cbr\u003eNo other engine mods required\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eUses OEM Cylinder Head\u003c\/p\u003e\n\u003cp\u003e**Cost Savings:**\u003cbr\u003eReuses your OEM head—no need to buy expensive head\u003c\/p\u003e\n\u003cp\u003e**Simple Install:**\u003cbr\u003eJust replace cylinder and piston assembly\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eAthena Quality\u003c\/p\u003e\n\u003cp\u003eAthena is a world leader in 2-stroke and 4-stroke engine components. Their big bore kits are used by professional racers worldwide.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e⚠️ California Prop 65 Warning\u003c\/p\u003e\n\u003cp\u003eThis product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003eQuestions?\u003c\/p\u003e\n\u003cp\u003e📞 541-668-7503\u003cbr\u003e📧 Support@dunegoonshop.info\u003c\/p\u003e\n\u003cp\u003eShips same day before 3pm EST ⚡\u003cbr\u003eIn stock - Ready to ship!\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":47601031872737,"sku":"0931-0114","price":1156.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/athena-big-bore-cylinder-kit-490cc-suzuki-rmz450-2005-2006-8389967.png?v=1764883985","url":"https:\/\/dunegoonshop.com\/products\/athena-big-bore-cylinder-kit-490cc-suzuki-rmz450-2005-2006","provider":"Dune Goons","version":"1.0","type":"link"}