Description & Size Guide
                        Piston Kit for 4 StrokeEnhanced 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 #CW20Yamaha YZ 450 F 2010-2013 Yamaha YZ 450 F 2010-2013 Yamaha YFZ 450 2006-2014 Yamaha YFZ 450 BB 2006-2007 Yamaha YFZ 450 R 2009-2025 Yamaha YFZ 450 RSE 2012-2018 
                      
                    This item fits to following bikes.
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