yes upjet, you need to determine what jet size is working best with your setup, all bikes are different, like people. Whats good for one moped may not be right for the next, even with the exact same setup. Do plug chops! what i usually do is start with a fresh plug, then keep increasing jet size until your four stroking at w.o.t., then drop back a jet size and do your plug chop, you want a nice dark chocolatey color. grey or white means too lean, better to be rich than lean.
Re: performance pipe for minarelli
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