Originally Posted by Last Train Bummer Jets all nice & clean & seated nicely ? Air leaks on carb or intake seals ? Yeah jets all good and can’t find any leaks etc, it runs perfect on tick over and low speed up to 60 but over that it splutters.
if it has a fuel pump check it for pressure or it could be the float level is wrong/hole in float so that it starves the bowl of fuel above 60
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