If you're plannig to or already have a stroker crank setup in your Yamaha WR250R/X, you'll need this stroker piston.

Features:

• All piston skirts are coated with a hi-tech Molybdenum Disulphite coating for faster break-in time and increased piston life
• Cast Replica piston kits are gravity cast aluminum alloy (not forged) with 18% silicone content, which produces an extremely light but very strong piston
• Forged Replica pistons are forged from 2618 aluminum for superior strength and durability
• Forged High Compression pistons improve power and torque across entire rpm range
• Forged Big Bore pistons increase engine’s displacement, torque, and peak horsepower
• Forged Replica pistons are forged OE replacements
• All pistons are heat treated with a T-5 hardening and tempering cycle
• Replica pistons and all rings are OEM replacements
• Kits include piston, rings, wrist pin and circlips
• Two stroke replacement rings are sold individually (Example if your piston has two rings you will want to order two rings)
• Four-stroke piston rings sold as a set