Wiseco Forged Piston Kit 74mm Bore for Yamaha XT250 Raptor 250 2008-13

Forged from high-silicon aluminum alloy for maximum strength and dependability

Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls

Elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse 

Precision machined skirt with Armor Glide coating

13:1 comp