Precision CNC 420 Primary Chain Drive Conversion Kit Model:Ultra Bee if you want to apply

if you want to apply a Surron Ultra Bee to a Altis Sigma

and kill switch

The reduced vibration makes acceleration feel smoother

if you want to apply a Electro Co ETM RTR Bike to a Surron

Precision CNC 420 Primary Chain Drive Conversion Kit Model:Ultra Bee if you want to applyREV797 420 Primary Drive Sprocket Kit for Light Bee, Talaria, 79Bike falcon, Rerode R1 R1 + & E Ride pro , Ventus one one+ & Ultra Bee Forged from hardened tool steel, this kit is CNC machined for structural precision and finished with WEDM tooth profiling to ensure smooth chain engagement, reduced noise, and extended service life. Sandblasted and electroplated for corrosion resistance, each sprocket is heat treated to prevent deformation and maintain