🛠️ Yamaha Raptor 350 / Warrior 350 370cc Big Bore Engine Rebuild Kit (1987–2013)

Take your 350 to the next level with this complete 370cc big bore engine rebuild kit. Designed to fit all Yamaha Raptor 350 and Warrior 350 models and years, this is a bolt-on performance solution—no machining required.

Built with a forged JE piston and heavy-duty bottom end components, this kit boosts displacement to 370cc for real gains in torque and throttle response. Whether you're trail riding, racing, or just rebuilding, this is the ultimate all-in-one package.

✅ What’s Included:

• 85mm aftermarket big bore cylinder

• JE forged 85mm piston (pump or race gas compatible)

• Hi-temp piston rings

• Chrome wrist pin + circlips

• Hotrods or Wiseco heavy-duty crank with rod

• Complete gasket kit

• Complete seal kit

• Crank bearings

• Crank balancer bearings

• Transmission bearings

• Head stud kit

• Heavy-duty timing chain

📦 Fitment:
Fits all Yamaha Warrior 350 and Raptor 350 models & submodels from 1987–2013, including:

• YFM350X Warrior (1987–2004)

• YFM350 / YFM350R Raptor (2004–2013)

• All Special Edition (SE/SE2) variants

🛡️ Warranty Info:
This kit includes components from top-tier manufacturers like JE Pistons and Hotrods/Wiseco. All parts are new and backed by manufacturer defect warranty. Installation by a qualified technician is recommended.