Backfiring

hotdogg
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1982 kz750 spectre
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Backfiring

27 Mar 2014 14:21

#626799

Can someone enlighten me on some reasons a bike would backfire. Thank you

1982 kz750 spectre

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Patton
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Re: Backfiring

27 Mar 2014 15:04

#626810

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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gpz1170
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Re: Backfiring

28 Mar 2014 10:09

#626899

air leak at the carbs

1974 Z1
1976 KZ900
1978 KZ1000
1981 KZ1000
1983 GPZ1100

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baldy110
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Re: Backfiring

28 Mar 2014 11:10 - 28 Mar 2014 11:12

#626902

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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bountyhunter
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Re: Backfiring

28 Mar 2014 16:51

#626932

Lean condition or timing advancer problem.

1979 KZ-750 Twin

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loudhvx
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Re: Backfiring

29 Mar 2014 15:48

#627021

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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Re: Backfiring

15 Sep 2014 19:54

#647710

It was the advancer thank you I would have never thought of that

1982 kz750 spectre

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