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ok i know there is other threads on other sites about these motors, but was just wondering if anyone from here has much experience... for those who dont know they are the same as the gpx150cc and the same as the 150cc engines that come in the new atomik 150's. they claim to put out 16 Hp but...

iv got a lifan 125cc and it will not rev over about 2000rpm. the whole electrical system (stator, coil and cdi) r all sweet. I have tried 2 new mikuni carbies on it and there is no difference. it has the right amount of oil, the clearences r set properly the valves r seating right and the...

was just wondering if anyone has ever fitted a 3 valve head to a 125 or 140 size bore? the 3 valve has 2 mounts from the head to the bore on one side, rather than the regular 1 on the regular heads. im in the process of making the raddest motor ever and just wondering if any one else has tried.