YAMAHA OEM quality (contract maker)
high speed main bearing for crankshaft
Yamaha Minrelli 2 stroke 50cc & 90cc engine crankshaft
1E40QMB & 1E50QMF
price for 2x bearing
47mm(outer) X 20mm(inners) X14mm (thickness)
***this main bearing is open type for crankshaft high speed (max rotation speed 18000rpm)
***also with Heat Treatment process for best performance.
not all main bearing will with heat treatment.