Race-Rite 180 Series Cylinder Heads
  • 2.020'' Intake / 1.600'' Exhaust Valves
  • 1.250'' Diameter Valve Springs - 300# Open, 100# Closed Spring Pressure
  • 67cc Combustion Chambers

  • Race-Rite 200 Series Cylinder Heads
  • 2.055'' Intake / 1.600'' Exhaust Valves
  • 1.550'' Diameter Valve Springs - 400# Open, 140# Closed Spring Pressure
  • 67cc Combustion Chambers