CYLINDER HEAD RACING

Cylinder Head Racing for Yamaha Cygnus, BWs 5ML 4V

• 4-valve racing cylinder head for use on big bore cylinders for Yamaha 5ML engines
• The cylinder head features stiffer valves and springs
• The inlet valves have a diameter of 23mm and the exhaust valves 21mm
• Inlet connection: 27mm, exhaust has a cross section of 26mm
• Not for 125cc original cylinders.