11-20-2010, 08:30 PM
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Originally Posted by beul
 i have the 125 lifan, the bike is roadlegal (germany) and it runs perfect! you should not use engine's bigger than 125cc (lifans) becouse the crackshaft cant handle it realy good and youre motor can die.. but the 125 is doing it now perfect for a year, only changed the oil 1 time, and 1 time valves clearance check. still runs like a new one.
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depends on which one you get....yx or gpx engines are good if you go big cc's....ive seen people beat on 140cc engines and 140cc's with BBK's that make them 160cc or so....or you can just do it big and get a 180cc 
midbikenation.com would help yall decide which one you want
the main thing is to get the engines that have 4 up gears. You dont want the ones with 1 down 3 up 
my 110cc engine in my lil stunter is a mufuggin beast even after 7 years. I do rollers on the street with the engine screaming and it just wants more