🛠️ 2003–2024 Yamaha YZ250 Big Bore Engine Rebuild Kit – 295cc Top & Bottom End

Take your YZ250 to the next level with this complete 295cc big bore engine rebuild kit featuring top-tier components from Cylinder Works, Vertex, and Hot Rods. This is the most reliable and powerful bolt-on rebuild solution for your 2-stroke.

No case machining required—just bolt on and ride.

✅ What’s Included:

• Cylinder Works 72mm Nikasil-Plated Big Bore Cylinder (295cc)

• Vertex Forged Moly-Coated 72mm Piston Kit (rings, pin, clips) – pump gas friendly

• Optional Wiseco or Wossner Piston Upgrade (contact us)

• Big Bore Cylinder Head + Powervalve Kit

• Vertex Top End Gasket Kit (Big Bore)

• Hot Rods Heavy Duty Crankshaft Assembly w/ Rod

• Hot Rods Wrist Pin Bearing

• Hot Rods Main Crank Bearings + Seals

• Vertex Complete Engine Gasket Set

• Vertex Bottom End Oil Seal Kit

• NGK Spark Plug

📦 Fitment:

Fits all 2003–2024 Yamaha YZ250 2-Stroke Dirt Bikes

• Includes standard and special edition models

🛡️ Warranty Info:

All parts include manufacturer-backed warranties.
⚠️ Installation must be done by a qualified engine builder. Warranty is void if failure is due to improper install, tuning, break-in, or misuse.