DOHC
Dual Overhead Camshaft (DOHC) is a valvetrain design where two camshafts are located in the cylinder head — one operating the intake valves, the other the exhaust valves. DOHC engines can accommodate more valves per cylinder (typically 4 or 5) and rev to highe...
What does DOHC mean?
Dual Overhead Camshaft (DOHC) is a valvetrain design where two camshafts are located in the cylinder head — one operating the intake valves, the other the exhaust valves. DOHC engines can accommodate more valves per cylinder (typically 4 or 5) and rev to higher RPM than simpler designs.
The main advantage of DOHC is its ability to produce high power outputs at high revs, making it the preferred choice for sportbikes and performance-oriented engines. Honda's CBR series, Kawasaki's Ninja ZX range and Yamaha's YZF-R series all use DOHC layouts.
Compare with SOHC (Single Overhead Camshaft), which uses one camshaft to operate all valves via rocker arms. SOHC engines are simpler, lighter and often produce more torque at lower RPM.
How riders should use this term
Motorcycle terms are most useful when they help you understand real riding behavior. When you see DOHC on a spec page, treat it as one part of the full motorcycle package, not as a number or feature to judge alone.
- Compare the term against the motorcycle category and intended use.
- Check related specs such as weight, engine size, seat height, braking system and suspension.
- Use the comparison tool if two bikes look similar on paper.
DOHC questions
What does DOHC mean on a motorcycle?
Dual Overhead Camshaft (DOHC) is a valvetrain design where two camshafts are located in the cylinder head — one operating the intake valves, the other the exhaust valves. DOHC engines can accommodate more valves per cylinder (typically 4 or 5) and rev to higher RPM than simpler designs.The main advantage of DOHC is its ability to produce high power outputs at high revs, making it the preferred choice for sportbikes and performance-oriented engines. Honda's CBR series, Kawasaki's Ninja ZX range and Yamaha's YZF-R series all use DOHC layouts.Compare with SOHC (Single Overhead Camshaft), which uses one camshaft to operate all valves via rocker arms. SOHC engines are simpler, lighter and often produce more torque at lower RPM.
Why is DOHC important when comparing motorcycles?
It helps riders understand how a motorcycle may feel, perform or behave in real use. The exact importance depends on the bike category and the rider's purpose.
Where can I compare motorcycles that use this term?
Use the MotoLibrary specs database, advanced filter and comparison tool to see how this term appears across different motorcycles.