@pelplouffe I know when you delete the side stand switch you need to loop it out, otherwise it'll have intermittent spark issues.
Not saying that this is you problem here, just one to be mindful of.
just thought sombody wound of know some on ebay that fits other bikes for cheap as it a spare carb but looks like got to order original one now but thanks for the links
I like 34:1 or 32:1 if your romping it, it's a shame the gear ratios are so short on a YZ. If you keep it fuelled on the over run, just a blip or 2, you can expect no issues, provided the engine has the correct fuelling mixture!
These engines are awesome, and can withstand abuse, just got to keep it setup correctly.
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I've been reading today a lot about the reeds , interesting technology , pretty simple but great. Loads of videos on youtube also , man did tutorial how to get max of them.