Over - Peda
- Over-inflation
- Over-steering
- Overall dimensions
- Overall efficiency
- Overall gear ratio
- Overall height
- Overall length
- Overall steering
- Overdrive (overgear)
- Overhaul manual
- Overhead camshaft
- Overhead exhaust valve
- Overhead inlet valve
- Overhead valve
- Overhead valve engine
- Overheating
- Overload spring
- Overlubrication
- Overrunning clutch
