SKF main crankshaft bearings and seal kit for Yamaha/ Minarelli 50cc 2-stroke engines.
Kit contains two SKF bearings and two double lipped oil seals. This is a very high quality C4 bearing (same as used for Polini Evolution) offering less friction due to the fibre cage and less engine damage in the event of failure.
Suitable for use with high revving high power race kits as well as standard.

Bearing size: both 20x47x14mm

NOTE: For the polymer version the half-open cage bearings must be inserted so that the cage is facing the crankcases. (balls visible)