Kit crankshaft bearing heavy cage C4 polyamide + spy ATHENA Hyper Racing scooter minarelli (booster rocket, bws, nitro, ...)

The working model kit ATHENA HYPER RACING, it consists of 20 crankshaft bearings TN9 C4-type game, these bearings are super reinforced, special high speed cage designed for lubrication! The polyamide avoids vibration and allows total freedom without forcing to the RPM! The pack also contains 2 joints spy racing high-speed anti-friction. For all minarelli scooter.