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backfires

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my new (used) yz426 is backfires a bit when i close the throttle off from wide open, what can i do to stop it? sorry 4 all this questions but i just moved from 2 storkes bike (ktm300exc 1998)....

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This condition means you are a little lean on the pilot and/or fuel screw. A little bit of backfire is ok but, anything more than a little bit and you need to make an adjustment.

Ernie

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