Motorcycle Glossary
Camshaft
In Turkish: Eksantrik mili
In short
The camshaft uses its cam lobes to open and close the valves at the right time.
On four-stroke engines the camshaft turns at half crankshaft speed and is driven by a cam chain (a belt or gears on some engines). Engines can be single overhead cam (SOHC) or double overhead cam (DOHC); on SOHC engines the lobes usually act on the valves through rocker arms.
- Worn lobes open the valves less, causing power loss and noise.
- Lobes and rocker faces wear quickly without oil.
- When fitting, align the timing marks correctly with the crank.
Also known as (including Turkish names)
- Kam mili
- Eksantrik
- Külbütör
Related products
Camshafts
Last updated: October 9, 2026
