Selecting the Right Sprocket and Drive Kit

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. Kit comes with front and rear sprocket and chain.

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. Kit comes with front and rear sprocket and chain.

Combo Drive Kits

Combo Drive Kits are designed to create more torque and change the final drive ratio to raise the rpm's slightly to loft the front wheel with ease. This ratio change will also increase acceleration for a better take off and quicker roll-ons at every speed- in every gear. These kits are offered in a Combo 1, 2, and 3. Combo 1 comes with 1 down in the front and 1 up in the rear and new chain. Combo 2 comes with 1 down in the front and 2 up in the rear and new chain. Combo 3 comes with 1 down in the front and 3 up in the rear and new chain. The Combo kits are the ideal setting for most bikes to obtain the maximum amount of torque and acceleration without losing to much of your top speed.

Individual Sprockets / Custom Drive Kits / Chain

We can accommodate just about any size sprocket for any bike and also carry uncommon and hard to find chains in all sizes, lengths, and colors. Please e-mail info@thestuntfactory.com for price quotes on custom sprockets, drive kits and chains.

Why convert to 520 chain and sprockets?

Depending on the bike and what size you are converting from you can gain 4-8 hp just by putting a good quality 520 chain and lighter sprockets on the bike. The lighter chain and sprockets create less centrifugal force which lets the motor spin them easier. For stunting, the smaller pitch causes less drag. Most good 520 chains are rated to 750cc but there are ones rated to 1000cc also.

What’s the difference between 520, 525 and 530?

Pitch can be characterized by the thickness and weight of a chain. The first digit (5) indicates the center-to-center distance between chain pins. The second and third digits (20, 25, 30) indicate the chain’s width, measured between the inboard surfaces of the inner sideplates.

Because wider chains are typically stronger, the second and third digits also indicate a chain’s strength. Higher numbers correspond to greater strength, i.e. a 525 chain is stronger than a 520. This additional strength is achieved through increased roller diameter, pin diameter, pin length and plate thickness.

520
Will take the most weight off of your bike and will increase horsepower, however it is important to note that by decreasing pitch, you can expect faster wear especially on bigger bikes because the drive forces are getting spread over a slightly smaller surface area.

525
Middle of the road, standard chain that comes standard on most 600 and 750cc models. 525 is more durable, but heavier than a 520 conversion.

530
The heaviest, thickest and most durable chain pitch. Comes OEM on most 900- 1400cc models.
Don’t Forget! A worn or poorly maintained chain will wear an aluminum sprocket prematurely!