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Please note:

Yamaha R1 Top Velocity Stacks 09-14 - ABY-09R1-REVT

by

Graves Motorsports

Velocity Stacks
Fits the following bikes
  • Yamaha YZF-R1 / S / M 2009-2014

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Product Description

Item Summary

  • Top velocity stacks.
  • Lower velocity stacks sold seperatly.

About the Product

Graves Motorsports Yamaha R1 Top Velocity Stacks for the 2009-2010 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.

Developed by Graves for your Cross Plane Crank Yamaha R1. 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 R1’s air-box evenly at low and mid range RPMs.

The shorter than stock lower stacks feed the R1’s appetite for big air when the upper stacks raise improving top end power.

These stacks were specifically developed on the Graves Yamaha Superbike give our riders the drivability needed to win races. Available now for your 2009-2010 Yamaha R1.

NOTE: Both "Upper" and "Lower" R1 Velocity Stacks are designed to work togehter. The items are sold seperately as you can use our performance designed lowers with the stock uppers (uppers cannot be used with the stock lower stacks).