03-19-2011, 06:26 AM | #12 |
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Re: Backfiring
Have you checked the valves? Seem to remember that on older vehicles (many moons ago) that valve timing could affect this. Just a guess, at best. :??:
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03-20-2011, 06:09 AM | #14 |
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Re: Backfiring
Maybe not, but Suzuki recommend a check at the 1000km (620mile) service. Just sayin'. :2tup:
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03-21-2011, 08:33 AM | #15 | |
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Re: Backfiring
Quote:
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04-30-2011, 12:30 AM | #16 |
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Join Date: Apr 2011
Location: hudson florida
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Re: Backfiring
Hello my name is Sarah.
I have a 2004 gz250 that backfires as well. I have checked everthing Ryn has mentioned and still it backfires. The only thing it has that is different is, the last owner did drill holes in the end of the exhaust.? Any help would be appreciated. Hugs and Kisses, Sarah Rose. |
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04-30-2011, 01:39 AM | #17 |
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Re: Backfiring
ohh hugs and kisses? yaya! how bad is the backfire? my bike does have a little put put noise when i get off the throttle but its nothing to concern with. you have a drilled muffler so im sure its gonna mke some noise, but that also means your bike might want more fuel to compensate form the increase capacity for airflow. try putting a 20 pilot in there and adjusting your idle mixure like blain says, warning i did this today and it was a major pain in the ass, hot engine burning my hands ouch.
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99 gz 250 and a currently dismantled fzr 1000 |
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04-30-2011, 02:10 AM | #18 |
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Re: Backfiring
Or you could just plug the extra holes in the exhaust and see if it is to your liking.
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04-30-2011, 08:54 AM | #19 |
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Join Date: Apr 2011
Location: hudson florida
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Re: Backfiring
I will try pluging the holes. But where is the mixture screw located,? I can't find it. All the holes on the side of the carb on my bike seem to be pluged off, is it under the float bowl somewhere.?
Thanks, Hugs and KIsses, Sarah Rose. |
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04-30-2011, 08:56 AM | #20 |
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Re: Backfiring
Check the decelaration circut in the carb. It involves the smaller side diaphram and the associated jets. after 10 years or so the diaphram gets stiff and cracked (new ones at bike bandit dot com). The jet behind the small diaphram could be blocked and the passage under the spring loaded check ball could get a shot of carb cleaner and a shot of wd40 (stick the pray straw into the hole and depress the ball under the small diaphram plunger). This circut enriches the fuel mixture on decelleration with the throttle closed. --Dan--
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1999 GZ250 - teal green past bikes 100cc twin yamaha-1960's era - first bike 100cc and 125cc honda CB 350cc yamaha twin - 1970 160cc honda -1966 model 350cc honda CB 1970 350cc honda SL 650 Yamaha 1972 F650gs BMW 2007 Virago 750 Yamaha 1996 |
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