Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Front Fender Carbon fiber with superior cord

Carbon fiber with superior cord tensile strength and DUMAX™ top cog compound to retain cord rigidity and better adhesion of top cog to cord construction

the ActiveTune kit monitors the fuel mixture making fast and consistent changes to mitigate changing fuel requirements

louvered core inside the muffler body The muffler is finished off with a reverse cone El Diablo style tip

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and cooler running

Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Front Fender Carbon fiber with superior cordGraves 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