Measuring and shimming valve clearances to spec — the precision job air-cooled singles need around every 10,000 km and that roadside mechanics routinely ignore. Done with feeler gauges and patience, not guesswork. Restores smooth idle and lost top-end.
What's included
- Measure all valve clearances
- Shim / adjust to OEM spec
- Cam timing + chain tension check
- Post-adjust idle + road test