Help with an 04 bruin

[ananomaly]

Just started backfiring thru exhaust and air intake. Changed plug and it didn't help. Other than that I have not done anything else to it. Exhaust out the back looks normal. Not blue...not white.

Thanks for any help,
Gary

[MedicMudder]

Look and smell at exhaust if it is black or smells strong might be running rich
making it backfire.Might be carb came loose,sucking air? Back firing is unburt gas burning in exhaust. Or exhaust leak?

[ananomaly]

Thanks M&M I'll check the carb.