8784DA - Wossner Piston kit For Yamaha YFZ450 2012-2014 Standard Size A

Features: 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. 12.0:1 CR '06-'09 YFZ450 carb. 12.3:1 CR ''12-'13 YFZ450 carb. 12.3:1 CR '09-'13 YFZ450R EFI. 12.3:1 CR '10-'11 YFZ450X EFI. 12.5:1 CR '17 YFZ450 EFI. 12.5:1 CR '14-'24 YFZ450R EFI. 12.6:1 CR '04-'05 YFZ450 carb. 62.00 mm stroke for '04-'05. 63.40 mm stroke for '06-'24. Kit Includes: • Piston #8784DA • Ring Set #RIK95.00 • Wrist Pin #WP029-SP • Retaining Clips #CW20.