Well, since I ride a loncin I feel like I have to step in and say something, yes lifan is the better of the two engines, but at least my 110cc loncin has proven to be bulletproof, I got it brand new, used maybe 20mins to break it in before really letting it rip, it have suffered huge crashes, I have used the bike every weekend the last year, even been ridden in knee-deep snow, it always fires up on the first couple of kicks, it has enough power to be entertaining (still want more though), The only thing i've had to replace on the engine is the clutch, but thats because I abuse the clutch alot, and i've installed an high-comp piston just for fun, 24moto.com have all the parts needed to rebuild the engine if needed. If you replace the oil every few rides, and letting it warm up before abusing it, any engine will give you long life.