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Runs Rough
- Vter Bob
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The bike starts fine idles fine but seems to run rough until it gets above 3,000 RPM. If I bog the engine down just a little below 3K RPM (in any gear it seems) the bike will shudder and buck violently. I am also experiencing some minor backfireing on deceleration.
Carbs and I have bad karma but I'm thinking maybe that's my problem. Any suggestions would be greatly appreciated.
Georgia, Vermont
1981 KZ550 LTD
1982 KZ1000 LTD
1999 ZG1000 Concours
Greetings from the Peoples Republic of Vermont, home of Ethan Allen, 2 American Presidents, a socialist US Senator and.....Homer & Bart Simpson
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- exoskel
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- transcend...
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1979 KZ750B4
1998 Yamaha Blaster
South Bend, Indiana
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- Vter Bob
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Georgia, Vermont
1981 KZ550 LTD
1982 KZ1000 LTD
1999 ZG1000 Concours
Greetings from the Peoples Republic of Vermont, home of Ethan Allen, 2 American Presidents, a socialist US Senator and.....Homer & Bart Simpson
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- SPARKY47
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- 1980 KZ500 B2
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1980 KZ500 B2
Location: Middle England[/b
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- zskunk
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- Bullitt03737
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1980 CSR 1000. New dyna Coils, Vacumn Less Petcock, Various Handle bars depending on the day, (Drag and Clubman.)
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- Vter Bob
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Georgia, Vermont
1981 KZ550 LTD
1982 KZ1000 LTD
1999 ZG1000 Concours
Greetings from the Peoples Republic of Vermont, home of Ethan Allen, 2 American Presidents, a socialist US Senator and.....Homer & Bart Simpson
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- KOOL RYDER
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- KZ 650B2 / KZ 1000E
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I checked mine this year after changing the plugs and noticed a small crack.
After replacing it I experienced no further backfires and the performance increased by a factor of 10.
Something else to look into.
Rockin\' a KZ650B2 since 2007 and a KZ 1000E since 2008
1978 KZ650B
1979 KZ1000ST
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- mariozappa
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I could only hope it would be that simple for you.
1977 KZ650C1
and the KZ650/KZ750 Conversion
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- kzwolfsr
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1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- MFolks
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1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- JR
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.... The pilots are what I will work on next....
Are the carb Keihin CV type ? If so then when you have them off for the pilots check and see if you have transition holes. Open the throttle flap and look in and up. Just behind the hole for the pilot air screw may be three tiny holes. If there make sure they are clear. I use a fine pin with a right angle bend on mine (Keihin CV34).
Blocked transition holes can cause a stumble, chug chug at about 2,500 - 3,000 rpm on my 750.
1980 kz750E1, Delkevic exhaust
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