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Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Stock Bore Top End 95MM Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Stock Bore Top End 95MM

Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Stock Bore Top End 95MM

$90.25

Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures....

Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Top End Kit 98MM Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Top End Kit 98MM

Cometic 06-09 Yamaha YZ450F/07-15 WR450/09-23 YFZ450R Top End Kit 98MM

$90.25

Today's lightweight engines are producing more horsepower, higher cylinder pressures, clamp loads and extreme temperatures....