Those feeler gauges (also called thickness gauges) make the adjustment of valves easy. You always adjust valves with two feeler gauges at the same time and very precisely.
2V engines 1x intake and 1x outlet
4V engines 2x intake and 2x outlet
(not for DOHC and LC engines)
3 and 4 cylinder K motorcycles according to requirements
Clearance of the rocker arm shaft bearing is not possible. The length ensures easy handling. The plastic handle provides good feedback even when your hands are oily.
Important: Only a mechanic with the necessary experience should do this work.
You can find the correct valve clearance for your motorcycle in the manual of your motorcycle.