PISTON KIT YFZ450 04-05 94 95

Piston Kit for 4 Stroke

Enhanced piston pin oiling slots, radial boss machining, and annular grooves for improved wrist pin lubrication

Lightweight piston with a tight piston wall clearance for a quieter running engine

Skirt coated for reduced friction and improved break in performance

Ring land treatment for improved ring seal and oil control

Double bridged forging design where noted

Kit includes piston, rings, wrist pin and pin locks

62.00 mm stroke for '04-'05 Yamaha. 63.40 mm stroke for '06-'24 Yamaha. 13.0:1 compression ratio for '04-'05 Yamaha. 12.4:1 compression ratio for '06-'09 carbureted Yamaha. 12.6:1 compression ratio for '09-'13 EFI Yamaha. 12.6:1 compression ratio for '12-'13 carbureted Yamaha. 12.8:1 compression ratio for '14-'24 EFI Yamaha. Kit Includes: • Piston #8601DA • Ring Set #RIK95.00 • Wrist Pin #WP038-SP • Retaining Clips #CW20