Serious Carb Problem
- BIGD
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Serious Carb Problem
18 Apr 2010 12:07 - 18 Apr 2010 12:09
I have just put a rebuild kit into my 4 carbs. Am quite sure that I have done this properly. I have done the 1 and 1/4 turn out on the pilot screw according to the manual. My bike is still having difficulty with idle going up and down. And while driving it, the idle does not return quickly when the throttle is released. I rebuilt the carbs to get rid of this problem, but it seems to be still there. Am I missing doing something? The throttle cable seems to be working, although it is very old. I have tried to adjust the idle screw, but this does not seem to help. Thanks BIGD
Had 1981 KZ1000 M1 From 1981-1995 Canadian Model
Have 1981 KZ1000 M1 US Model
Have 1981 KZ1000 M1 US Model
Last edit: 18 Apr 2010 12:09 by BIGD.
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- timebomb33
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Re: Serious Carb Problem
18 Apr 2010 12:13
still sounds like you have a partil blockage in the pilot circuit somewhere sorry to say but those are perfect symptoms of bering to lean on the pilot if nothing else has been changed then i'd be pulling the carbs and spraying copious quanity's of carb cleaner followed by lots of air pressure thru all the passages again. always checking for proper flow thru them.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
I THINK MY POWERBAND BROKE
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- Mellvis
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- BIGD
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Re: Serious Carb Problem
18 Apr 2010 13:02
Don't think so all new rubber.
Had 1981 KZ1000 M1 From 1981-1995 Canadian Model
Have 1981 KZ1000 M1 US Model
Have 1981 KZ1000 M1 US Model
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- timebomb33
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Re: Serious Carb Problem
18 Apr 2010 16:17
trust me go after the pilot circuits i've never lied to yet have i. and your problem isnt that much of a serious problem gas pouring all over the floor and down into the sump is serious.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
I THINK MY POWERBAND BROKE
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- TeK9iNe
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Re: Serious Carb Problem
18 Apr 2010 17:50 - 18 Apr 2010 17:52
timebomb33 wrote:
:laugh:
Sometimes best to use a single sdtrand from a steel brush and poke it down through the small pilot holes in the carb bores.
Taper the small straw that comes with the spray carb cleaner can, so it will poke into the pilot jet end and stay there.
Then, when your spraying cleaner through, have a look and make sure that all the tiny passages are flowing the same across all carbs.
GL!
trust me go after the pilot circuits i've never lied to yet have i. and your problem isnt that much of a serious problem gas pouring all over the floor and down into the sump is serious.
:laugh:
Sometimes best to use a single sdtrand from a steel brush and poke it down through the small pilot holes in the carb bores.
Taper the small straw that comes with the spray carb cleaner can, so it will poke into the pilot jet end and stay there.
Then, when your spraying cleaner through, have a look and make sure that all the tiny passages are flowing the same across all carbs.
GL!

Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors

Last edit: 18 Apr 2010 17:52 by TeK9iNe.
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- BIGD
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Re: Serious Carb Problem
27 Apr 2010 09:48
Have completely removed carbs and parts, cleaned all holes with carb cleaner and then air dried and put back together and installed. Much improved and now able to ride it. I am still having trouble keeping the idle around 1000 and sounding smooth. Is this acceptable because of age, or can adjusting the vacuum screws make the final difference. Do not have gauges, but could take it to the shop or get my own set. Or is there something else I should try. All have been helpful so far. Thanks Don
Had 1981 KZ1000 M1 From 1981-1995 Canadian Model
Have 1981 KZ1000 M1 US Model
Have 1981 KZ1000 M1 US Model
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- otakar
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Re: Serious Carb Problem
27 Apr 2010 10:09
Now it sounds like synchronization.
74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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