Motorcycle Glossary
Idle speed
In Turkish: Rölanti
In short
Idle speed is the lowest engine speed at which the engine keeps running with the throttle closed.
The correct idle speed is given in the owner's manual; on most motorcycles and scooters it is between 1,000 and 2,000 rpm. On carburettor engines it is set with the idle screw; on fuel-injected engines the ECU controls it automatically.
Common causes of a hunting or low idle
- An air leak at the intake manifold
- A dirty carburettor pilot jet or throttle body
- A worn spark plug or clogged air filter
- Incorrect valve clearances
Also known as (including Turkish names)
- Rölanti devri
- Idle
- Relanti
Related products
Carburettors & Parts
Last updated: October 9, 2026
