All of our Drive Kits include a lightweight 7075-T6 alloy rear sprocket, drilled and lightened case-hardened steel front sprocket, and an EK Quadra X-ring chain that is cut to length for the gearing stage you choose. The lightweight parts and low friction chain will improve your hp 5 to 7 percent at the rear wheel.

Available in these Gearing Options:

Stage I:
All Stage I and Stage II Sprocket Kits come with a front and rear sprocket and are designed to be used with the stock pitch and length chain.

Stage I = An increase in acceleration, torque, and overall performance by approximately 10%. This setup is designed to maximize both acceleration and top speed.

Stage II:
Stage II = An increase in acceleration and torque of 18% on average. A loss of 5-10% in top speed may be experienced.

Note: If the current chain is intended to be used then it should be in very good condition due to the added stress of any kit.

Street Stunt:
Street Stunt Drive Kits are designed to be used by riders who are more interested in technical stunts and acceleration than top speed.

Most of these kits will be an increase of about 12-14 teeth net.

These kits will reduce the top speed of most bikes by 25% or more. This is as low of a gearing change that can be made while still maintaining a very 'streetable' bike.

Pro Stunt:
PRO Stunt Drive Kits are designed to be used in competition by professional riders on a closed course. Most of these kits will be an increase of about 20-22 teeth net.

These kits will reduce the top speed of most bikes by 40% or more.

In many case these predetermined kits are only available in conversion sizes, so please review the charts carefully.

Professional Installation is Recommended.

Kawasaki ZX9R Thrust Company Complete Drive Kit Fits:

2002-2003 Kawasaki ZX-9R