great bike. same engine as the tomos mopeds all parts interchangeable except exhaust. any custom exhaust can be done though. plastic parts will be hard to find now, but ebay you can sometimes find. but even so... amazon has many generic plastic parts for dirt bikes. my point here is that these dirt bikes are actually quality made bikes. donĀ“t associate them with chinese crap. factory says 50:1 fuel ratio spark plug gap somewhere between .5 and .8mm. i find it runs best at .7 or .8. you can easily ad, in a matter of two hours or so.... a 70cc kit. treatland mopeds or 1977 mopeds.