Warning!
- Make sure the motorcycle is stabilised and adequately supported.
- A correctly supported motorcycle will help prevent it from falling.
- An unstable motorcycle may fall, causing injury to the operator or damage to the motorcycle.
![](https://motoinstruction.ru/img/triumph/15/121812.jpg)
1. Measure across 20 links; 2. Weight
1. Remove the chain guard.
2. Stretch the chain taut by hanging a 10-20 kg (20-40 lb) weight on the chain.
3. Measure the length of 20 links on the straight part of the chain from pin centre of the 1st pin to the pin centre of the 21st pin. Since the chain may wear unevenly, take measurements in several places.
4. If the length exceeds the maximum service limit of 319 mm, the chain must be replaced.
5. Rotate the rear wheel and inspect the drive chain for damaged rollers, and loose pins and links.
6. Also inspect the sprockets for unevenly or excessively worn or damaged teeth.
![](https://motoinstruction.ru/img/triumph/15/121813.jpg)
7. If there is any irregularity, have the drive chain and/or the sprockets replaced by an authorised Triumph dealer.
8. Refit the chain guard, tightening the fixings to 4 Nm.
Warning!
- Never neglect chain maintenance and always have chains installed by an authorised Triumph dealer.
- Use a genuine Triumph-supplied chain as specified in the Triumph Parts Catalogue.
- The use of non-approved chains may result in a broken chain or may cause the chain to jump off the sprockets leading to loss of motorcycle control or an accident.
Caution! If the sprockets are found to be worn, always replace the sprockets and drive chain together. Replacing worn sprockets without also replacing the chain will lead to premature wear of the new sprockets.