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Carb and running question from a new guy
- FrankenKZ650
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21 Jun 2014 04:52 #637374
by FrankenKZ650
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
Carb and running question from a new guy was created by FrankenKZ650
Hello all!
I am new to bikes so go easy
I recently picked up the bike in my sig. From my research, it appears as if I have Mikuni VM24's on the 750 motor, which seem a bit small (especially considering the exhaust and pods). The bike seems to run well, and pulls hard to 9,000 rpm. The bike had a small misfire between 7-9k before I put the correct plugs in it (the PO had NGK B6ES rather than the correct B8ES plugs). The old plugs looked okay. After new plugs, the bike cruises nicely, but still has a 1/2 misfire if that makes sense (e.g. It does not pop out the carbs or exhaust, but you can hear a kind of very small misfire at cruising throttle, but when you get on it, the bike pulls smoothly). The exhaust also crackles a lot on decel, which I am assuming is normal considering my exhaust set up.
I am wondering if the bike would wake up if I sourced the correct carbs for the motor, or if there is any advantage to keeping the existing carbs. It just seems like it's running better than it should be with the small carbs on the 750!
Thanks for any advice
I am new to bikes so go easy
I recently picked up the bike in my sig. From my research, it appears as if I have Mikuni VM24's on the 750 motor, which seem a bit small (especially considering the exhaust and pods). The bike seems to run well, and pulls hard to 9,000 rpm. The bike had a small misfire between 7-9k before I put the correct plugs in it (the PO had NGK B6ES rather than the correct B8ES plugs). The old plugs looked okay. After new plugs, the bike cruises nicely, but still has a 1/2 misfire if that makes sense (e.g. It does not pop out the carbs or exhaust, but you can hear a kind of very small misfire at cruising throttle, but when you get on it, the bike pulls smoothly). The exhaust also crackles a lot on decel, which I am assuming is normal considering my exhaust set up.
I am wondering if the bike would wake up if I sourced the correct carbs for the motor, or if there is any advantage to keeping the existing carbs. It just seems like it's running better than it should be with the small carbs on the 750!
Attachment image.jpg not found
Thanks for any advice
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
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- peter1958
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21 Jun 2014 08:28 #637387
by peter1958
Replied by peter1958 on topic Carb and running question from a new guy
Some close up pictures of the carbs would help.
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- FrankenKZ650
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21 Jun 2014 08:54 #637391
by FrankenKZ650
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
Replied by FrankenKZ650 on topic Carb and running question from a new guy
Attachment image_2014-06-21.jpg not found
Attachment image_2014-06-21-2.jpg not found
Attachment image_2014-06-21-3.jpg not found
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
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- peter1958
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21 Jun 2014 09:22 #637392
by peter1958
Replied by peter1958 on topic Carb and running question from a new guy
They look like 26mm to me
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- 650ed
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21 Jun 2014 14:52 #637422
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Carb and running question from a new guy
I think they are VM24SS with pilot screws. Did you install the 750 motor or did the previous owner? Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- FrankenKZ650
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21 Jun 2014 21:26 #637472
by FrankenKZ650
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
Replied by FrankenKZ650 on topic Carb and running question from a new guy
The PO installed the 750.
1977 KZ650 (1982 KZ750-4 Engine)
Vance & Hines 4:1
K&N Pods
1977 KZ1000
Kerker 4:1
K&N Pods
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