What happens when a motorcycle crankshaft fails?
1 Answers
When a motorcycle crankshaft is damaged, the following symptoms may occur: loud abnormal noises, increased likelihood of cylinder scoring, accelerated wear of parts, a knocking sound when accelerating, and the noise becoming louder with higher throttle input. The causes of motorcycle crankshaft damage include: repeated burning of the main bearings and connecting rod bearings, weakening the support at the burnt areas; excessive clearance between adjacent main bearings; excessive wear or prolonged looseness of the main bearings; severe end play or burning of the crankshaft; burning or rolling of the last main bearing; excessive bending or misalignment of the crankshaft; and misalignment of the main bearing seat holes due to deformation of the cylinder block.