219 Primary Belt to Chain Conversion Kit | Talaria X3 | (XXX)DirtyBike 219 Primary Chain Drive Kits for Talaria XXX are Super Quiet and Reliable DirtyBike's 219 XXX primary chain drive system slightly reduces the gear ratio to provide better acceleration and easier wheelies. Hardened, light weight steel sprockets and RK's sealed O ring chain provide seamless power transfer and a reliable, long lasting drive system. Ride long enough and eventually you will have primary belt slippage which will inevitably lead to