Wiseco Piston 1.25mm Oversize Yamaha Banshee 350 1987-2006 513M06525

If you're running a Banshee 350 at the limit, your factory piston won't cut it. The Wiseco +1.25mm oversize piston delivers the compression ratio and durability needed to extract real power gains while holding up under sustained racing loads. Built for riders who demand precision and reliability in their top-end.

This piston kit comes complete and ready to install—you get the forged piston, rings, wrist pins, and circlips in one box. The high-silicon aluminum construction resists detonation and thermal stress, while E-Coating on the crown and pin bore fights wear and galling. The optimized forging geometry maximizes combustion efficiency and improves ring sealing, translating to measurable gains in horsepower and torque across the powerband.

• Wiseco part number: 513M06525
• Size: +1.25mm oversize
• Material: High-silicon aluminum
• Application: Yamaha Banshee 350 (1987–2006)
• Includes: Piston, rings, pins, circlips
• Crown finish: E-Coated
• Pin bore: E-Coated
• Ring grooves: E-Coated
• Installation: Requires honing
• Fitment: Oversize—rebore required