Sprocket and Chain Replacement on an ATV
Replacing the chain and sprockets on a quad is fundamentally no different from doing it on a motorcycle. If you follow the correct procedure, this can be done quickly and easily. In the video, we showed the process using the example of a Yamaha Raptor 700 ATV. The article indicates the main points that you should pay attention to.
Removing the front sprocket
The nut of the front sprocket can be difficult to unscrew. You will probably need penetrating lubricant and a long-handled wrench. You can also lock the axle with a rod through the eccentric.
Chain installation
If standard sprockets are installed, then the chain length is determined by the manual. If non-standard, then the length needs to be determined on a case-by-case basis, with minimum tension. If the chain ends meet on different plates (outer and inner), you'll have to add another link to install the master link. It's better to increase or decrease the rear sprocket by an even number of teeth, and not change the front one at all. The stock chain on the Yamaha Raptor 700 has 98 links, and the front and rear sprockets have 14 and 38 teeth respectively. One tooth of a sprocket corresponds to half of a chain link, so it is better to increase (or decrease) a sprocket by an even number of teeth.
Chain tension
When replacing a set of sprockets and a chain, it is necessary to check the tension after a couple of hours of use, as the new chain will stretch a little. Chain slack is measured without load, with all four wheels of the quad on a flat surface.
The axle locking bolts are tightened gradually, in a certain sequence and to a specified torque.
Bolt tightening torques
When tightening all the bolts and nuts, it is best to follow the torque values in the manual. This is necessary so as not to strip anything and securely fix the components. Wheel and sprocket nuts are also tightened gradually in a crisscross pattern. If the thread is clogged, it must be cleaned! If there is no torque wrench, you can tighten the nuts by hand with a short wrench (a long wrench can easily strip the thread). The front sprocket nut cannot be loosened by locking the wheel with the rear brake alone: with enough force, the wheel will still turn.
In the video we showed all the highlights. We hope it is useful!
