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Popping from exhaust at idle
- ghunt81
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15 Oct 2008 06:46 #241911
by ghunt81
1978 Kawasaki KZ750 Twin- Coil mod, Dyna coil, 7mm copper core wires
Popping from exhaust at idle was created by ghunt81
What causes popping from the exhaust at idle?
I noticed last night that while my bike is sitting idling, it pops intermittently from the right side exhaust. Left side pipe does not do it.
I noticed last night that while my bike is sitting idling, it pops intermittently from the right side exhaust. Left side pipe does not do it.
1978 Kawasaki KZ750 Twin- Coil mod, Dyna coil, 7mm copper core wires
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- bountyhunter
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15 Oct 2008 13:28 - 15 Oct 2008 13:29 #241963
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic Popping from exhaust at idle
Most likely culprits:
1) fuel level wrong in the right hand side carburetor
2) pilot mix screw not adjusted correctly
3) pilot jet dirty
1) fuel level wrong in the right hand side carburetor
2) pilot mix screw not adjusted correctly
3) pilot jet dirty
1979 KZ-750 Twin
Last edit: 15 Oct 2008 13:29 by bountyhunter.
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- MFolks
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15 Oct 2008 13:37 #241966
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic Popping from exhaust at idle
Another suggestion would be to check the valve clearances as a "tight" valve may not be seating properly.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- wiredgeorge
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16 Oct 2008 06:16 #242072
by wiredgeorge
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
Replied by wiredgeorge on topic Popping from exhaust at idle
Popping can be not only mechanical (valves not adjusted), but can be from air leaks at the intake side, bad exhaust crush gaskets or can be incomplete combustion due to poor spark or mis-adjusted timing.
wiredgeorge Motorcycle Carburetors
Mico TX
www.wgcarbs.com
Too many bikes to list!
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- gane
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16 Oct 2008 20:24 #242210
by gane
[img][/img] 1977 KZ1000A1
Replied by gane on topic Popping from exhaust at idle
All others, plus this, popping is usually a result of unburned exhaust igniting in pipe.probable cheap causes are lean mixture, intermittant/weak spark. one that beat me up was a burned valve & seat. valves walk around wilst running and when pitts lined up,compression dropped low enough that burn was incomplete resulting in incompete burn charge exiting ex. port to be ignited by following heat. I'd try a set of points 1st and a EGA, since the only way to chk this is visual. luck g
[img][/img] 1977 KZ1000A1
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