Heavy Hitter 520 Primary Chain Conversion for Surron Ultra Bee

Big Performance for big power builds and long term reliability. The heavy hitter Ultra Bee primary chain conversion is designed with perfection in mind. Most primary chain conversions are flat cut 420 sprockets, which will work but requires additional maintenance and shorter chain life. We have designed our chain conversion around a 520 chain, because lets face it even on light bee's broken chains were happening and with more weight and more power an upgrade is needed. Additional to the chain size being upgraded we have also designed an exclusive dished rear sprocket. The primary chain conversions with flat sprockets left very little room from the frame adjuster and rear lower motor mount frame tab. This will ultimately end up with damage and scarring to your frame if your tension goes slightly out of spec, so why not use the room provided and space it internally.  Features Exclusive dished sprocket design for proper clearance 520 O-ring Chain included for longterm reliabili