Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit Standard kit includes front fender

Standard kit includes front fender

OEM color-matched for direct replacement

NOTE: Must have bike side harness in order to use this kit (not included)

2019-2022 Yamaha YZ 250 F - - 2019-2022 Yamaha YZ 450 FX - - 2018-2022 Yamaha YZ 450 F

Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit Standard kit includes front fenderGraves Motorsports Yamaha R1 Lower 50mm Velocity Stacks for the 2009 2014 models. These 50MM Lower Velocity Stacks with Pivots were developed by Graves Motorsports for your Cross Plane Crank R1. This item is the "Lower" stack assembly only (see item # ABY 09R1 REVT to purchase the top add on). This stack kit improves power throughout the entire RPM range. The staggered tops allow the cylinders to share the available volume of air in the R1s air box