Technical Specs:Alloy: Hypereutectic 390
Bore: 4.310''
Crankshaft Stroke: 4.000''
Connecting Rod Length: 6.135''
Deck Height: 9.800''
Compression Height: 1.645''
Pin Size: 0.990''
Pin Location: Centered
Hollow Dome Top: .250'' 26cc IV (Open Chamber Head)
Intake Valve Relief: 0.266'' Depth / 2.310'' Diameter
Exhaust Valve Relief: N/A
Top Landing Height: 0.311''
Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom
Gram Weight: 650/158
Compression Ratio: 10.2:1 w/119cc Heads