I am not a mechanic or a representative of any motorcycle or tool manufacturer or anything else official. This page is only my notes on doing this procedure myself. Although I believe what I have documented here is correct, I make no promises and you do this at your own risk.
Single-cylinder engines are prone to vibration. To counter this, the KLR has an internal counterbalancer shaft. The shaft is chain-driven, and the chain has an automatic tensioner that needs to be adjusted every 5000 km.
- Metric socket wrench or nut drivers, 10mm and 8mm.
- Small, thin, flat-blade screwdriver.
- Do not get distracted and back the tensioner adjuster bolt out all the way — just loosen it. If you back it out all the way, you need to disassemble the engine bottom-end to reassemble the tensioner.
The tensioner is spring loaded and resets itself automatically. All you have to do is loosen and then re-tighten a screw.
With an 8mm socket, loosen the exposed adjustment nut two turns. Do not take it all the way out! Just loosen it two turns. Then, re-tighten the screw.
That’s it — you have adjusted the counterbalancer chain tensioner. That was easy.