TOP END REBUILD KIT. INCLUDES PISTON, RINGS, WRIST PIN, CIRCLIPS, TOP END GASKET KIT, AND WRIST PIN BEARING. PISTON IS FOR THE STANDARD BORE (72mm). FITS: 1985-1999 POLARIS TRAIL BOSS 250 2-Stroke ATV
- Top end rebuild kit includes piston, rings, wrist pin, circlips, top end gasket kit, and wrist pin bearing
- Piston is for the standard bore (72mm)
- Piston features high-silicon content Hypereutectic cast aluminum material for less heat expansion, tighter clearances, increased hardness, longer life and reduced scuffing
- MOS2 (Teflon/Molybdenum) coated skirts perform at the highest standards, reducing friction and heat for added power and longevity
- Fits: 1985-1999 Polaris Trail Boss 250 2-Stroke ATV (with stock 72mm bore)
- Top end rebuild kit includes piston, rings, wrist pin, circlips, top end gasket kit, and wrist pin bearing
- Piston is for the standard bore (72mm)
- Piston features high-silicon content Hypereutectic cast aluminum material for less heat expansion, tighter clearances, increased hardness, longer life and reduced scuffing
- MOS2 (Teflon/Molybdenum) coated skirts perform at the highest standards, reducing friction and heat for added power and longevity
- Fits: 1985-1999 Polaris Trail Boss 250 2-Stroke ATV (with stock 72mm bore)
