all of the above and make sure it idles rich enough. if it is stock and lean or overly lean, the bike will not get quite enough fuel though have just enough to keep going and when you take out the momentum the motor dies: overheated, dry as anything, hard to start.
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1971 Garelli Gulp 50cc with open ports and 16 mm Bing Carbie + 1980 Honda XL 223 ZS + 2007 Zongshen LZX200G + DR400SM
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