76 kz900 29mm smoothbore issues... video included

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17 Mar 2016 10:51 - 17 Mar 2016 11:03 #715841 by Lmdgr34
76 kz900 29mm smoothbore issues... video included was created by Lmdgr34
I have included a video to help describe the problem I'm having. I'm currently running a 120 main and 17.5 idle. If it give it any amount of gas too fast it just dies. It was somewhat better when I had a 25 idle jet. Do I keep going up on the idle jets? I had the carbs syncd and taken care of professionally a year and a half ago, but now that I've gotten the voltage problem taken care of this is now what it is doing. Thanks
1976 KZ900
29mm smoothbores, pod filters, 4-1 pipe....and a whole lot of daydreaming
Last edit: 17 Mar 2016 11:03 by Lmdgr34.

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17 Mar 2016 11:48 #715850 by strum
Replied by strum on topic 76 kz900 29mm smoothbore issues... video included
where are your air screws set at? try turning them in or out .
example if they are all set at a turn and a half out then go in a half turn to see if it changes.
Blairsville Ga.

1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)

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17 Mar 2016 12:08 #715854 by Lmdgr34
Replied by Lmdgr34 on topic 76 kz900 29mm smoothbore issues... video included
if I remember correctly they are 3/4 turned out. I will double check that when I get home, thank you!
1976 KZ900
29mm smoothbores, pod filters, 4-1 pipe....and a whole lot of daydreaming

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  • SWest
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  • 10 22 2014
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17 Mar 2016 15:58 #715885 by SWest
Replied by SWest on topic 76 kz900 29mm smoothbore issues... video included
Mikuni says to start at 3/4 turn then adjust for best idle 1/4 turn at a time waiting 10 seconds each time to let the carb catch up. Keep the idle around 900/1200. If it won't do that, sync the carbs then try again. When I'm done I'll raise the RPM's to around 2500 and listen for a miss. I can usually dial it out this way unless the pilot's are too big.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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17 Mar 2016 16:03 #715886 by Lmdgr34
Replied by Lmdgr34 on topic 76 kz900 29mm smoothbore issues... video included
Steve,

I will have to give that a go tomorrow. I can get it to idle all day long. I just can't give it throttle too quickly or it dies.

Thanks,
Walt
1976 KZ900
29mm smoothbores, pod filters, 4-1 pipe....and a whole lot of daydreaming

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  • SWest
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  • 10 22 2014
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17 Mar 2016 18:10 #715906 by SWest
Replied by SWest on topic 76 kz900 29mm smoothbore issues... video included
What clip position are your needles at? If you change them you'll HAVE to sync the carbs again.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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17 Mar 2016 18:12 #715907 by Lmdgr34
Replied by Lmdgr34 on topic 76 kz900 29mm smoothbore issues... video included
they are in number 3
1976 KZ900
29mm smoothbores, pod filters, 4-1 pipe....and a whole lot of daydreaming

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  • 10 22 2014
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17 Mar 2016 18:16 #715911 by SWest
Replied by SWest on topic 76 kz900 29mm smoothbore issues... video included
Good, they are for fine tuning, elevation, etc.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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17 Mar 2016 19:00 #715927 by baldy110
Replied by baldy110 on topic 76 kz900 29mm smoothbore issues... video included
That jetting should work, check your timing advance unit.

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  • SWest
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17 Mar 2016 19:05 #715928 by SWest
Replied by SWest on topic 76 kz900 29mm smoothbore issues... video included
+1
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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17 Mar 2016 20:00 - 17 Mar 2016 20:00 #715940 by spdygon
Replied by spdygon on topic 76 kz900 29mm smoothbore issues... video included
I'm running 29mm on my kz900 as well.
4-1 exhaust and a air box
115 mains
15 pilots
1/2 turn out
Idle at around 1500rpm
Never been able to get them at 900-1200.
1982 GS1000sz Katana ( #15...17K Miles)
1982 GS1000sz Katana ( # 297....7100k Miles)
1978 Kz1000 Z1R. 10K Miles1
1978 kz1000 z1r 27k miles
1977 KZ 1000 A ( Project ) 54K Miles
1976 Kz900A4 (Red)21K miles
1976 Kz900A4 ( Red)7500 miles
1974 Z1 900 project
Last edit: 17 Mar 2016 20:00 by spdygon.

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17 Mar 2016 20:02 #715943 by Lmdgr34
Replied by Lmdgr34 on topic 76 kz900 29mm smoothbore issues... video included
I have a 4 -1 and pods
120 main
25 pilots(now)
3/4 turn out
it'll idle at 1k all day long but stalls if accelerates too hard. I'm going to try the advancer tomorrow.
1976 KZ900
29mm smoothbores, pod filters, 4-1 pipe....and a whole lot of daydreaming

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