Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit 2019-2022 Yamaha YZ 250 F

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

QVF & QVR Intake/Exhaust Ducts — Features QVF three-position intake and QVR exhaust ducts for excellent air intake and exhaust performance when riding

This radiator cap is designed to keep your engine from overheating by maintaining a higher pressure inside the cooling system thus increasing the boiling point of your coolant

8:1 air/fuel ratio

Mandrel Bent Titanium Tubing

Graves motorsports lower 50mm velocity stacks R1 2009-2014 ABY-09R1-REVB Complete Clutch Kit 2019-2022 Yamaha YZ 250 FGraves 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