Piston Kit - Yamaha YFZ 450 ('04-'13) / YFZ 450 R ('09-'20) - 450 4T - ProX

Please select the piston size from the box above.

ProX piston kit for Yamaha YFZ 450 (2004-2013) / YFZ 450 R (2009-2020) - 450cc 4T. The complete application list can be found below.

Technical specifications:
- standard cylinder diameter (factory diameter): 95.00 mm
- engine type: 4-stroke
- total piston length (B): 42.10 mm
- piston pin diameter (C): 20.00 mm
- compression height (D): 15.00 mm
- pin ring position measured from center (E): -
- pin ring position measured from center (F): -
- internal distance of piston pin (G): 21.50 mm
- piston head shape: recessed
- other information: 5 x valve pockets
- manufacturing technology: forged piston
- compression ratio: 12.0:1 (YFZ 450 - 2004-2009) / 11.4:1 (YFZ 450 - 2012-2013) / 11.6:1 (YFZ 450 R - 2009-2020)

Available piston sizes (A):
- A (94.95 mm)
- B (94.96 mm)
- C (94.97 mm)