So I almost got my 70cc Puch kit done, all im waiting for is studs. I want to putt a 21PHBG on it, and performance exhaust, but I aint gonna have the money for a couple weeks, Would it do any harm to run it with the 15 bing jetted out and stock exhaust unrestricted with the baffles drlled until I get the bigger carb and exhaust.
15 Bing will be fine.
Stock pipe isn't going to allow you to hit the RPM's that you will with an expansion chamber, but then again I don't expect that you'll be blasting it at first anyway.
Some people say break it in exactly how it'll be ridden. I say just try it, ride it at no more than 75% of throttle for like 50 miles, give it short random bursts of WOT. When the ring seats, the ring seats. Then do what you please.
Yeah I was more or less worried about the exhaust header being to small diameter. I heard that the best way to break it in is 3 tanks 32:1 rich fuel mixture no more than 30 mph.The tune it and run it.
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