best mods

I have a 212 predator for my go kart its a smaller frame but it has a roll cage on it. The frame is a manco 486 pheonix eagle 2 lxt. I'm looking to up the performance on it i have an air filter .035" main jet and an rlv header but i don't know if I should get a CL-1 cam or a BSP-3 racing cam. I...

Im new to OldMiniBikes (first thread) and have been messing with mini bikes for maybe 2 years now. I've been modding and tuning an hf predator on a Baja warrior a lot and am now looking for a major performance increase by switching to a torque converter. Which one should I get?