Forged EN40B crankshaft to fit 1300 or A+ block, but with rod journal size to fit Cooper S rods. 81.3mm stroke, as standard for 1275. Main bearing width is 1.211” with 1.625” rod journal. Crank has been redesigned to benefit from latest technology by having the leading edge chamfered on the crank webs to reduce whip and resistance at high revs, giving smoother running and easier balancing, plus being mass-center balanced. Rod pins are drilled to reduce weight; main bearings are cross-drilled. Full-length keyway at front, key stock included.
5/7/2019 2:00:00 AM