Graves motorsports top velocity stacks r1 2009-2014 ABY-09R1-REVT Yamaha Vintage Baseball T-Shirt Used by most factory teams

Used by most factory teams

Product Information

Graves Motorsports Yamaha R1 / FZ10 / MT10 Cat Eliminator Y Pipe Upgrade with (Exhaust Valve Type-R – Butterfly Valve Technology)

hits and inclement weather conditions

Graves motorsports top velocity stacks r1 2009-2014 ABY-09R1-REVT Yamaha Vintage Baseball T-Shirt Used by most factory teamsGraves Motorsports Yamaha R1 Top Velocity Stacks 09 14 Graves Motorsports Yamaha R1 Top Velocity Stacks for the 2009 2014 models. This "Upper" or "Top" velocity stack is sold seperately from the lower billet machined piece shown in picture ( Lower Part # ABY 09R1 REVB). See below for full details and restrictions on these parts when used with stock pieces. The upper stacks must be used with a YEC ECU or Flash Tune and correct setting will be supplied