I have backfireing bike wr 250 f ?
I have a wr 250f every time I slow down it pops and then when I rev it a purple flame shoots out
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I have a wr 250f every time I slow down it pops and then when I rev it a purple flame shoots out
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Answers & Comments
Yup, that's what it meant to do.
It might be running a little rich, turn it down a tiny amount.
Check your valve clearances.
good question !