I bought an old 1980 Puch Newport a couple of weeks ago and have a couple of questions.
1.) The guy I bought it from said that the pre-mix ratio is supposed to be 50:1. Is this correct. Since owners' and shop manuals are as scare as Gutenberg Bibles, I can only take his word unless someone with more authority comes up with an answer.
2.) Is there any indentifier for the Newport besides "Newport"? Is there another model that is similar enough to the Newport to use as a source of information?
3.) Is the bi-turbo exhaust worth the cost? Is it the same as an expansion chamber that used to be used on two-stroke motorcycles. Does the carb have to be re-adjusted? Is it louder than the stock set-up?
4.) If anyone wants to clean their exhaust baffles, the following may be useful. It's the method suggested by CZ for their old 175 street motorcycle back in the seventies: Disassemble the baffles from the pipe. Place baffles on a surface that doesn't burn, i.e. sand pit or firepit. Pour gas over the baffles. Light gas and let burn. Scrub baffles with wire brush to remove soot. I don't think you'd want to do this in town or near an EPA office.
5.) Why doesn't anyone carry tire patches and a pump with their tools? It works for bicycles.
D the D