Re: Odd noise at low speed.

Jim Madden /
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Dan your description fits exactly what is happening with my 64cc polini maxi i just couldn't put it into words.lol.I had a large jet in there for breakin and would get the sand sound which i thought was pinging around 25mph. It seamed to happen when i let off the gas.

I did a plug chop today and found i was rich.I dropped it one jet size and the sand moved up to around 34mph Much less pronounced though it still also 4 strokes, but that also moved up to higher rpms I'm going to chop again tomorrow and probably drop another size I'm also runninig 40:1 oil,bi turbo and 14 mm carb. with 16/40 sprockets.Jim

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