KTM 4-stroke counter-shaft dome washer. Fits all KTM 4-strokes (00-2014) up to 530cc. Also fits most Husaberg and Beta 4-strokes.
Testing has determined that the OEM dome washer is made of mildly heat treated material. When that component is installed under a tightened counter-shaft bolt, it is taken well beyond it’s “yield” or “elastic” limit and permanently deforms. In that condition in cannot maintain the thrust pressure necessary to keep the sprocket tight to the splined shaft. That leads to two different failures. First, the O-ring is allowed enough clearance that is begins seeping. Secondly, the backlash between the splined shaft and sprocket is allowed to more freely pound in each direction, as the torque of power verses compression reverses itself.
Dirt Tricks has developed a tool steel, heat-treated dome washer that develops two to three times the pre-load force without reaching its elastic limit and without over-stressing the mating components. This solves O-ring leakage as well as extending the life of both the counter-shaft and sprocket splines. A counter-shaft replacement alone, with labor costs in excess of $700.
If you plan to keep your KTM four-stroke for many seasons this product is well worth the investment.
Note: There are 2 different KTM front sprockets available on the market. One is intended for the 620-690′s but it will appear to fit on a regular 125-530cc KTM. It is a much wider sprocket at 11.4mm where a standard sprocket should be 8.8mm. If you attempt to run this thicker sprocket on your KTM, catastrophic failure of the washer will result. To ensure you have the correct sprocket, the countershaft should stick though the face of the sprocket. If it does not, -if the countershaft comes several mm’s from sticking though the sprocket – you have the wrong sprocket! Our part number for the wider sprocket is KTM2, and it only should be used on KTM 620-690 and the KTM 450 Rally Bike.
“Your Source for Innovation” Dirt Tricks, Inc. was founded in 2002 taking an innovative and new approach to developing and manufacturing aftermarket off-road parts. All of Dirt Tricks parts are unique in some way and superior to comparable existing products. Their sprockets have reached worldwide recognition for their amazing longevity combined with their lightweight design. There is no doubt they are the longest lasting sprockets in the world.
Dirt Tricks brake rotors provide stopping power that is unmatched from any standard size rotor. They are extremely hard to bend and they also run cooler for the brake draggers of the world.
All Dirt Tricks products are proudly made in the USA at their production facility in Minden, NV.