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Talk Wrench - Do it yourself drum brake maintenance

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Tools

Appropriate spanners, a few rags.

Process
1. Place the bike on the centre stand and shift the gear into neutral.



2. Clean the brake actuating arm and the drum back-plate with
the rag.

3. Loosen the check-nut. Tighten the adjusting nut while pressing the brake pedal/lever to check progress.

4. After the right throw is reached by the brake pedal/lever after actuation, tighten the check-nut. Rotate the wheel by hand and it should rotate freely without any ‘drag’ – tech-speak for the brake shoes touching the drum without the brake being activated. Then rotate the wheel fast and pull in the brake. The wheel should stop at once.

5. Ride the bike for a short distance and note if there is any lack of pickup, or if the drum is getting unusually hot and if observed, re-adjust accordingly.

Ask Kyle

Ever since I put on a K&N air filter and a free flowing exhaust pipe, I have noticed that the engine of my Hunk has been running hotter than usual. The acceleration hasn’t improved by much, despite the claims of the dealer who sold me the parts. HELP!
–  Amol

What that dealer didn’t tell you, but really should have, is that just fitting a free flow exhaust and air-filter won’t get you any performance gains from your motorcycle. In fact, it could do more harm than good to a stock motor because the filter lets in more air into the combustion chamber, allowing the air-fuel mixture to run lean, hence the increased temperature. What you need to do is get your carburettor up-jetted, a process that involves fitting carb jets in increasing sizes till the motor runs right, with no flat spots. A free flowing exhaust can burn the exhaust valves if it isn’t designed right (lack of back pressure) or if the carb is running lean.