How to Adjust Motorcycle Valves?
2 Answers
Locate the valve adjustment position on the motorcycle, then loosen the fixing screw of the valve adjuster. Rotate the crankshaft's magneto to make the camshaft rise and push against the exhaust valve, thus completing the valve adjustment.
I've done motorcycle valve adjustments quite a few times, and experience tells me to start with simple steps. First, find a quiet place and make sure the engine has completely cooled overnight—working on a hot engine is not only unsafe but can burn you. Gather your tools: a good wrench, a feeler gauge (also called a clearance tool), and gloves to avoid cuts. Next, remove the valve cover, usually located on top of the engine, and take it off gently to avoid damaging the gasket. Locate the valve adjustment screw and spring, then use the feeler gauge to measure the gap—too small and the engine will be noisy, too large and it affects performance. Turn the screw slightly to adjust it to the right position, preferably according to the motorcycle manual's recommended values. My experience suggests testing the adjustment by rotating the crankshaft a few times to ensure smooth operation. When reassembling, double-check that all parts are properly seated. The key is regular maintenance—adjusting the valves every 10,000 miles, for example—to prevent abnormal wear that could lead to rough idling or even ignition issues. In the long run, this saves money and hassle.
