Stage6 R/T main crank bearings and seals kit for Yamaha Aerox/ Minarelli 50cc 2-stroke scooters.

Changing the crank bearings requires a complete engine strip down, so it definitely pays to fit the best when replacing or upgrading them!

Stage6 offers you these high quality crankshaft bearing kits in 2 versions, with metal cage or with polymer cage. Both types are rated for use up to 20,000rpm with C4 clearance and are suitable for use with the highest end cylinder kits on the market.

The version with polymer plastics cage has higher elasticity and a reduced friction coefficient as compared to the metal ball cage, the metal cage bearing is more resistant than the polymer version, but also generates more friction and hence more heat, which results in a shorter life expectancy.

Sufficient lubrication and proper installation of crankshaft and bearings are of course essential for long life.

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

Attention! The polymer cage bearings cannot be used with standard exhausts which contain catalytic converters.

Stage6 S6-80366C4/TN9, S6-80366C4/MET