All Thrust Company 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.

Stage I and II Wheelie / Acceleration Sprocket Sets

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 approx. 10%. This setup is designed to maximize both acceleration and top speed. Stage II = An increase in acceleration and torque of 18% on average.

A loss of 5-10% in top speed may be experienced. Notice- If the current chain is intented to be used then it should be in very good condition due to the added stress of any kit.

Stage I and II Drive Kits

All Stage I and Stage II Drive Kits come with a front and rear sprocket and new chain. The final drive ratio of the Stage I and II Drive Kits are the same as the Sprockets Sets. However, in some cases we are able to use a larger front and rear sprocket. And in this case, the new chain will be a longer length to accommodate this In many cases we offer these kits in popular conversion sizes, so please review the charts carefully.

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.

Pro Stunt Drive Kits

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.

520 Conversion Performance Kits

For those looking for the optimum performance we offer 520 Conversion kits in all of our ratios for most popular middle-weight class bikes. Low friction chains combined with lightweight sprockets give extra acceleration without wasting hp or rpm's.

In fact, gains of 5-7% percent are typical just form bolting on one of our high performance 520 kits. (For larger displacement bikes we offer most kits in performance enhancing 525 pitch.) Many other models are available upon request.

Individual Sprockets / Custom Drive Kits / Chain

We can accommodate just about any size sprocket for any bike. And although our specialty is combining kits to make choosing the right setup easy, we do sell individual sprockets and custom drive kits. We also carry common and hard to find chain in all sizes, lengths, and colors. Please call or e-mail for price quotes on individual sprockets

Important Notes-

All of our drive kits come with x-ring or w-ring sealed chains that are appropriately rated for the bike for which they are intended. Please check with us before using any parts of a specific kit on a bike of larger displacement than it was originally intended.
All exisintg chains should be chceked for wear (stretched, binding, tight spots, etc.) before new sprockets are installed. Installing new sprockets on a worn chain will significantly reduce the sprocket life and can cause serious damage.

The chain tension on all modern sportbikes should be maintained with a minimum of 2" of top-to-bottom travel to accommodate full suspension movement and prevent premature chain stretching and sprocket wear.


FOR INFO ON STOCK SETUP ON YOUR BIKE GO HERE

*Info used courtesy of Thurst Company*