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Originally Posted by blackjer  Its got a lifan 140 on 50% nitro.  Inner rotor, ported head, 26mm carb, and some other little tricks. |
That thing looks good. But, if you still need more both options are good. The Lifan 150 would use the head and cam you currently have. The 160 GPX with the Trailbikes V2 head would probably make more power after mods. But the next big issue for you is going to be your clutch. Probably going to have to look into a locker. lol - john