Primary Drive RK MXU Sealed Enduro 420 Replacement Chain | Surron Ultra Bee Ramped Racing They have proven to be

They have proven to be the toughest aluminum sprockets we have ever tested

Axle end-bolts can be found here

Surron L1E/ LBX/ LBS (2024 and prior years)

it’s built to resist impacts

Rev up your ride with the Pivotrax PowerLink Aluminum eMoto Sprocket

Primary Drive RK MXU Sealed Enduro 420 Replacement Chain | Surron Ultra Bee Ramped Racing They have proven to beReplacement RK MXU Chain For All DirtyBike Ultra Bee 420 Primary Chain Drive Systems Super high quality sealed MXU chain is the best for enduro riding for a long lasting drive system. Direct replacement for all DirtyBike Ultra Bee 420 primary belt to chain conversion kits.