Crankshaft

Part of S58 engine · about $3,200 to replace

What it is

Forged steel crank with eight counterweights.

Converts the pistons' linear motion into rotation; carries the flywheel and belt drive.

Rod-bearing wear shows as a knock under load; bearings are replaced pre-emptively by track owners at ~100,000 km.

Material	Forged 42CrMo4 steel, induction-hardened journals
Spec	Stroke 90 mm
	main journal 60 mm
	7 main bearings
	21 kg