Norton offset crankshafts are usually supplied with a full flywheel for optimal smoothness. This crankshaft type if recommended for solid-mounted Atlas engines. The crankshaft diameter, with counterweights, is about 1/4” smaller then a stock crankshaft to clear any high-lift camshafts and reduce the rotational weight of the crankshaft. Our crankshafts are usually 4.5 pounds lighter than a stock crankshaft.
This crankshaft costs $1200 USD
76° Norton crankshafts do not cost extra; they are the same price as a 90° offset crankshaft
Sludge trap plugs can be added for an extra $200 USD