Backfiring

  • hotdogg
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  • 1982 kz750 spectre
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27 Mar 2014 14:21 #626799 by hotdogg
Backfiring was created by hotdogg
Can someone enlighten me on some reasons a bike would backfire. Thank you
1982 kz750 spectre

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27 Mar 2014 15:04 #626810 by Patton
Replied by Patton on topic Backfiring
One possible reason could be a too tight intake valve causing backfire through the carb.

Good Fortune! :)
1973 Z1
KZ900 LTD

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28 Mar 2014 10:09 #626899 by gpz1170
Replied by gpz1170 on topic Backfiring
air leak at the carbs
1974 Z1
1976 KZ900
1978 KZ1000
1981 KZ1000
1983 GPZ1100

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28 Mar 2014 11:10 - 28 Mar 2014 11:12 #626902 by baldy110
Replied by baldy110 on topic Backfiring
If it started after installing a 4 into 1 pipe or pod filters it's usually a lean mixture install one size larger pilot. jets. If it started without any mods being done then I would look at air leaks at manifolds or the pilot system is getting dirty.
Last edit: 28 Mar 2014 11:12 by baldy110.

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28 Mar 2014 16:51 #626932 by bountyhunter
Replied by bountyhunter on topic Backfiring
Lean condition or timing advancer problem.
1979 KZ-750 Twin
The following user(s) said Thank You: hotdogg

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29 Mar 2014 15:48 #627021 by loudhvx
Replied by loudhvx on topic Backfiring
Bikes with the air suction system will backfire big and loud when you close the throttle if the system is malfunctioning, which is very common.

The easy remedy is to remove the system and cap off all ports.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.

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  • hotdogg
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  • 1982 kz750 spectre
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15 Sep 2014 19:54 #647710 by hotdogg
Replied by hotdogg on topic Backfiring
It was the advancer thank you I would have never thought of that
1982 kz750 spectre

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