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xs650 > > Motorcycle Systems > > Fuel > > backfire at startup |
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HDear Full Member
Joined: Dec 07, 2007 Posts: 46
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Posted: December 9, 2007, 12:00 am Post subject: backfire at startup |
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i just aquired a 78 xs650 bobber. im in ohio and the temps here are in the 30's. when i choke and start the bike fires right up but backfires through the left pipe for a few seconds. when its warm the backfire stops and the bike runs great. i am getting 52 mpg. is there a problem or is this normal with these temps? its done this 2 time and both times i choked the bike quite a bit. both times because i had forgot to turn the key on. not sure if this could have anything to do with it but thought i would mention it. thanks for any advise. harold.
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royfisk Full Member
Joined: May 24, 2006 Posts: 1597 Location: winchester, new hampshire usa
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Posted: December 9, 2007, 12:03 am Post subject: Re: backfire at startup |
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Im guessing a slightly loose left cylinder valve lash adjustment. adjust your valves
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5twins Full Member
Joined: Aug 05, 2006 Posts: 1616
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Posted: December 9, 2007, 1:41 am Post subject: Re: backfire at startup |
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You have a dual points system and the points gap or timing may be just slightly off on that left cylinder.
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