High-Performance 4-Stroke Piston KitFeature X-style forgings for ultimate strength, minimizing friction, durability, power, and weight reductionFull radius dome designs maximize quench while eliminating hot spots that promote detonationInternal bracing maximizes durability while decreasing friction in the pin assemblyPiston kit includes wrist pin, rings, & circlipsMade in the USA
YAMAHA
2001
YFM 660 R (5LP)
YAMAHA
2002
YFM 660 R (5LP)
YAMAHA
2003
YFM 660 R (5LP)
YAMAHA
2003
YFM 660 R LE (5LP)
YAMAHA
2004
YXR 660 FA 4X4 (5UG)
YAMAHA
2004
YXR 660 FAH 4X4 (5UG)
YAMAHA
2004
YFM 660 R (5LP)
YAMAHA
2004
YFM 660 R LE (5LP)
YAMAHA
2005
YXR 660 FA 4X4 (5UG)
YAMAHA
2005
YXR 660 FAH 4X4 (5UG)
YAMAHA
2005
YFM 660 R (5LP)
YAMAHA
2005
YFM 660 R SE (5LP)