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dirt bike question please answer!?

This is a discussion on dirt bike question please answer!? within the YZ forums, part of the Yamaha category; i have a older YZ80 today i went to start it and it started fine but stalled, i go to ...


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Old 12-28-2008   #1
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Default dirt bike question please answer!?

i have a older YZ80 today i went to start it and it started fine but stalled, i go to start it again, and it wont start and it backfires, what it wrong????
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Old 01-20-2009   #2
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could be your reeds
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Old 01-21-2009   #3
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Check for a fouled spark plug.
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Old 10-04-2011   #4
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Default backfiring yz80

if it sat fir a while with fuel in the carb, pull apart and clean your primary and secondary jets, put new fuel and should run great. a new tank of gas wouldnt hurt
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Old 10-04-2011   #5
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Default question for older yz80 guys

i am rebuilding a 1984 nyz80, am about 90% complete. my problem is the carb intake is busted and sucking too much air. mine has a vent tube that goes to an external expansion chamber. is this necessary? found new intake without tube on ebay for 25$ can this conversion work
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