Mine is happiest with 140 main and 38 pilot. I have also been blending my 10% ethenol 87 with PC1 brand octane booster. It runs really smooth. I have been keeping an eye on my cylinder with a harbor freight snake scope camera. These cameras are worth every cent of the $100 price tag  .......also my buggy calls for 91 octane fuel. Its just hard sin southern Illinois to find a pure based gas, so that's why I chose to take this route
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MASTERBATES
TM 150 XRX-P&P head,A13cam,opened exhaust,140 main,38 pilot,adj cdi, perf coil,115mm variaitor,12 gm rollers,NCYpulley,2000 rpm springs,racing clutch,taller rear tires,and etc. 
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