Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit NOTE: Must have bike side

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

8:1 air/fuel ratio

mounted with plastic screws designed to break on impact

Replacement cheek pads for Arai VX-Pro4 helmets

Diamond Shaped Silencer with tapered entrance (Carbon Fiber Silencer Body with Titanium End Cap) designed to match the GSXR’s body line

Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit NOTE: Must have bike sideGraves 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