Naraku crankshaft for Chinese 50cc 4-stroke 139 QMA/ QMB engined mopeds
This is an uprated heavy duty crankshaft complete with quality main bearings already mounted and a 16 tooth oil pump drive sprocket which makes for easy fitment.

Fits most Chinese 4-stroke GY6 engine 50cc mopeds (139QMA and 139QMB engines) such as Baotian and also Kymco 4-stroke.

Also fits Peugeot 4-stroke e.g. Speedfight 3, Vivacity ('08 on), Peugeot V-Clic.

13mm small end inner diameter.

Naraku NK100.81