Motorcycle Glossary
Gearbox
In Turkish: Şanzıman
In short
The gearbox transmits engine speed to the wheel through different ratios so the motorcycle can run efficiently at any speed.
Motorcycles use a sequential gearbox: gears are selected in order with the foot lever (usually 1-N-2-3-4-5-6). Inside are the main and counter shafts, gears, selector forks and a shift drum; on most motorcycles it is lubricated by engine oil.
Scooters use a CVT instead of gears. The overall ratio to the wheel is the gear ratio multiplied by the final drive ratio.
Symptoms of a problem
- Jumping out of gear under load (worn dogs or selector forks)
- Hard or notchy shifts (clutch adjustment or shift mechanism)
- Whining from the gearbox (worn bearings)
Also known as (including Turkish names)
- Vites kutusu
- Transmission
- Vites
Related products
Gearbox & Shifting
Last updated: October 9, 2026
