Cylinder Head Specifications:
Combustion chamber volume: 77cc
Intake runner volume: 188cc
Exhaust runner volume: 106cc
Intake valve diameter: 2.072"
Exhaust valve diameter: 1.68"
Valve stem diameter: 11/32"
Valve guides: Manganese bronze
Deck thickness: 5/8"
Valve spring diameter: 1.46"
Valve spring maximum lift: .575"
Rocker stud: 7/16"
Guideplate: Hardended steel
Pushrod diameter: 3/8"
Valve angle: 18°
Exhaust port location: Stock
Spark plug fitment: 14mm x 3/4 reach, gasket seat |