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its like the 4th of july every time I ride!
- mr anderson
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14 Jul 2009 06:54 #306926
by mr anderson
its like the 4th of july every time I ride! was created by mr anderson
so, like I said. my 77'650 pops like crazy when I ride it. I have taken carbs off and cleaned (lemon soak and carb cleaner) it was a bit better after that but still backfiring. I removed all the gas and put new in line filter, still no change.
where do I go now fellas'? point me in a direction a I will try it out.
where do I go now fellas'? point me in a direction a I will try it out.
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- Grantl
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- KZRider is Da Bomb!!!
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14 Jul 2009 07:02 #306928
by Grantl
1981 KZ1000 CSR
1983 KZ750 Project Bike
1990 550 Zephyr
1994 KZ1000 P
Replied by Grantl on topic its like the 4th of july every time I ride!
Backfiring usually means you have too much unburned fuel entering the exhaust port or exhaust pipe. Maybe you should check your timing.
Grant.
Grant.
1981 KZ1000 CSR
1983 KZ750 Project Bike
1990 550 Zephyr
1994 KZ1000 P
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- mr anderson
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14 Jul 2009 08:06 #306936
by mr anderson
Replied by mr anderson on topic its like the 4th of july every time I ride!
ok. I do have a manual but is there any tricks to checking the timing that I should know.
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- RetroRiceRocketRider
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- ...bring in the machine that goes PING!
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14 Jul 2009 08:13 #306939
by RetroRiceRocketRider
Replied by RetroRiceRocketRider on topic its like the 4th of july every time I ride!
Try increasing the amount of choke you give the bike - if the popping descreases or stops, then you've got a vacuumm leak somewhere and it's pulling in to much air.
Likely culprits are the intake manifolds which become rock-hard and brittle over the years, and most often the hairline cracks causing the vacuumm leaks are very hard to see.
With the bike running, sray some WD-40 or carb cleaner at each manifold individually (change in RPM's indicate you've found the leak). This will help give you a better idea of where the prob is located.
Likely culprits are the intake manifolds which become rock-hard and brittle over the years, and most often the hairline cracks causing the vacuumm leaks are very hard to see.
With the bike running, sray some WD-40 or carb cleaner at each manifold individually (change in RPM's indicate you've found the leak). This will help give you a better idea of where the prob is located.
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- MFolks
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14 Jul 2009 08:16 #306942
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 its like the 4th of july every time I ride!
Look at the ports on the carb manifolds for cracks,the rubber plugs dry out and crack. Z1 sells new ones.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- loudhvx
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14 Jul 2009 08:54 #306946
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Replied by loudhvx on topic its like the 4th of july every time I ride!
If the backfiring is consistent under most conditions, and not just when you close the throttle, I would check the power to the coils. You may have a flakey wire or a bad connection at the ignition switch, kill switch, or even at the fuse holders. The unburnt fuel builds up in the exhaust while the bike is no firing, then when the bike resumes firing, the fuel in the exhaust goes off like a fire cracker.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- loudhvx
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14 Jul 2009 08:55 #306947
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Replied by loudhvx on topic its like the 4th of july every time I ride!
Could also be worn out points, too. Check that first.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- mr anderson
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14 Jul 2009 08:57 #306948
by mr anderson
Replied by mr anderson on topic its like the 4th of july every time I ride!
will check those. sweet tricks. the bike acts the same weather I have full half or no choke though.
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- mr anderson
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14 Jul 2009 09:04 #306949
by mr anderson
Replied by mr anderson on topic its like the 4th of july every time I ride!
the backfire is when I get on the throttle not on close throttle.
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- loudhvx
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14 Jul 2009 09:17 #306951
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Replied by loudhvx on topic its like the 4th of july every time I ride!
May also be the coils.
May also need to check the voltage while riding.
Temporarily, as a test, you could run a wire directly from the battery positive to the coils. Put a switch in line. Make sure the battery is fully charged and has a good ground connection to the engine (if the starter works, the ground is probably good). If it acts the same, then the problem would be narrowed down to coils, wiring from coils to the points, or the points themselves.
May also need to check the voltage while riding.
Temporarily, as a test, you could run a wire directly from the battery positive to the coils. Put a switch in line. Make sure the battery is fully charged and has a good ground connection to the engine (if the starter works, the ground is probably good). If it acts the same, then the problem would be narrowed down to coils, wiring from coils to the points, or the points themselves.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- Patton
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14 Jul 2009 09:25 #306955
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic its like the 4th of july every time I ride!
If not already done, would also assure valve clearances being within specs.
Good Luck!
Good Luck!
1973 Z1
KZ900 LTD
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- hmondo
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14 Jul 2009 10:25 #306971
by hmondo
1989 KZ1000 P-8 (Police)
1987 ZL1000
1986 Concours (Project Bike)
Replied by hmondo on topic its like the 4th of july every time I ride!
I had the same situation on my 1979 KZ650 (way back when), and it turned out to be the reed valves that inject fresh air into the exhaust. I was advised to block off the aforementioned reed valves, but I do not remember how I did it. I’m rather certain that there’s an article here that describes their removal / alteration.
Labeled number 8 on the image...if it comes through!
Hope this helps!
Labeled number 8 on the image...if it comes through!
Hope this helps!
1989 KZ1000 P-8 (Police)
1987 ZL1000
1986 Concours (Project Bike)
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