Wiseco Piston Kit 83mm 10.25:1 Compression Yamaha YFM350R Raptor 2004 PK1018

If you're running your YFM350R Raptor hard—whether on the track or in demanding trail conditions—factory pistons won't cut it. Wiseco's forged-aluminum construction delivers the strength and thermal stability you need for sustained high RPM operation without premature wear or failure. This complete kit includes rings, wrist pins, circlips, and gaskets, so you have everything necessary for a proper top-end rebuild.

Wiseco engineered these pistons with high-silicone forged material specifically to minimize thermal expansion under extreme heat while maximizing durability in high-stress applications. The 10.25:1 compression ratio optimizes power output for the YFM350R platform without requiring fuel grade compromises. Since Wiseco rings are matched to Wiseco pistons, using this complete kit ensures proper ring seal and longevity—mixing brands compromises both.

• 83mm bore diameter
• 10.25:1 compression ratio
• High-silicone forged construction
• Includes rings and gaskets
• Includes wrist pins and circlips
• YFM350R Raptor specific fitment
• Minimal thermal expansion
• Racing and high-performance rated
• MPN: PK1018