All our Stunt sprockets are machined to exact tolerances, made by craftsmen who have been making sprockets for 85 years! All rear sprockets are 7075-T6 aircraft aluminum alloy and drilled for extra lightness. All front sprockets are machined from case-hardened steel, and most are drilled for lightness and plated for corrosion resistance. We take great pride in perfecting our products and our applications so that you can take pride in using them. Street Stunt Drive Kits 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.   

All Stunt Kit for the CBR1000RR come with a Gold EK MVXZ or RK GXW 525 Chain.