Backfiring...

jmink427

XS650 Junkie
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Location
Arkansas
I have notice that my 75 xs will backfire thru the carbs a little when I start it for about 30 seconds or so.... More out the left bank than the right.. Also I when I decelerate it will pop out the pipe on this side as well.... Lean? Do these bikes have an advancing system for the ignition like automotive engines or is it fixed? I still learning about these bike more and more everyday...
 
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