I have an 80cc black flying horse, it runs well, BUT, the transmission is very loud and screechy, once I was riding it and a guy yelled out, "Why is that thing so loud!", as I passed by. Since I got this motor , I've seen about 8 other 2cycle motorbikes, and none of them make this loud screechy transmission noise, and I thought, " I want whatever motorkit they're drivin,cuz, I hate the loud screechy noise. So, my question is, are these motorkits all made by the same DUDE?. If not, which ones are selling the smoother more quiet running motorkits?