bs34 carbs on 1980 KZ1000 LTD throttle cable issue

  • muddy1
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30 May 2010 13:02 - 30 May 2010 13:08 #372118 by muddy1
I searched for the correct cable, the Motion Pro pull cable was recommended #03-0132 as you can see in the picture, the free cable length is too short, it's maxed out, notice the butterflies are open:S , I called Z1 enterprises, they tell me the 03-0132 with the 3.5in free cable length is the longest "free length" cable they have. I called Motion Pro, and they will custom make one for me for around 36.00. has anyone already been through this? Save me some agrivation:P With the bracket (screwed to top of carb cover) I purchased from ebay, I wish to use only one cable for this setup. Any help will be appreciated:P

1970 SL-70
1972 CB 750
1973 Z1
1976 YZ 125
1976 KZ400
1979 KZ400 LTD
1980 KZ1000 LTD B4
1984 YZ 490
1989 750 Ninja
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Last edit: 30 May 2010 13:08 by muddy1.

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  • hocbj23
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30 May 2010 15:46 #372143 by hocbj23
is cable routed correctly?installed correctly?its hard for me to tell from this pic,but is the bracket that holds ur cable bent upwards a bit?if so may be able to bend it downward and gain some slack.bj

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  • hocbj23
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30 May 2010 15:49 #372146 by hocbj23
bump.Are 34s the correct setup for an 80 KZ LTD? I thought they ran a smaller carb like a 26 or 28?bj

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30 May 2010 16:11 - 30 May 2010 16:13 #372153 by Patton
muddy1 wrote:

I searched for the correct cable, the Motion Pro pull cable was recommended #03-0132 as you can see in the picture, the free cable length is too short, it's maxed out, notice the butterflies are open:S , I called Z1 enterprises, they tell me the 03-0132 with the 3.5in free cable length is the longest "free length" cable they have. I called Motion Pro, and they will custom make one for me for around 36.00. has anyone already been through this? Save me some agrivation:P With the bracket (screwed to top of carb cover) I purchased from ebay, I wish to use only one cable for this setup. Any help will be appreciated:P....


At Z1E, Motion Pro Throttle Cable 03-0132, 38" long with 3.5" max slack, is shown for KZ1000P (82-02)
Click > www.z1enterprises.com/detail.aspx?ID=2592

For 1980 KZ1000-B4 LTD, Z1E lists MP03-0020 as pull cable (44.5" long with 4" max slack)
Click > www.z1enterprises.com/detail.aspx?ID=273

and MP03-0019 for push cable (3.5" max slack).
Click > www.z1enterprises.com/detail.aspx?ID=272

Seems self-evident that any 3.5" max slack cable isn't going to fit KZ1000-B4 which requires 4" max slack.

Overall cable length is irrelevant to max slack dimension. And the same max slack is required when shorter cables are fitted to better accommodate lower handlebars for example.

With the bracket (screwed to top of carb cover) I purchased from ebay, --- am wondering if the ebay replacement bracket affords the same clearances as the oem bracket.
Is the oem bracket available to compare with the ebay bracket?

Since not mentioned, will suggest assuring that cable adjustments at both ends of cable, at handlebar throttle and at carb, have been screwed fully in to maximize exposure of inner cable.

And that the cable sheath ends fit fully into the fittings accepting the ends, and that the fittings aren't damaged.

Good Fortune! :)

1973 Z1
KZ900 LTD
Last edit: 30 May 2010 16:13 by Patton.

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30 May 2010 16:32 - 30 May 2010 16:33 #372155 by Patton
1980 KZ1000-A4 also used 4" max slack throttle cable.
Click > www.z1enterprises.com/detail.aspx?ID=266
As does KZ1000-C3
Click > www.z1enterprises.com/detail.aspx?ID=266

KZ1000-D1/2/3 Z1R use 3.75" max slack.
Click > www.z1enterprises.com/detail.aspx?ID=283

If all the available 4" max slack throttle cables from other years and models are too long or too short for the intended application, seems custom cable will be needed with specified overall length and 4" max slack.

Good Fortune! :)

1973 Z1
KZ900 LTD
Last edit: 30 May 2010 16:33 by Patton.

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31 May 2010 04:04 #372246 by weelzupamc
That bracket is way to far from the carbs bellcrank. I have the bs34s on my 80 LTD using Jmotor manifolds. The bracket is totally flat with the top of the carbs. Not sure what my carbs came from but it doesn't look too difficult to fabricate.See the attached picture and see how far away your bracket puts the end of the cable from the crank.
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  • muddy1
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31 May 2010 08:16 #372274 by muddy1
Thanks for the reply's, I will take the cable bracket to work and attempt to flatten the thing, may pick up a 1/2 in on the slack, may still have to get a custom cable made.

1970 SL-70
1972 CB 750
1973 Z1
1976 YZ 125
1976 KZ400
1979 KZ400 LTD
1980 KZ1000 LTD B4
1984 YZ 490
1989 750 Ninja

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  • muddy1
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31 May 2010 08:32 #372280 by muddy1
Looks like the easy way out would be to locate a bracket like this one...

1970 SL-70
1972 CB 750
1973 Z1
1976 YZ 125
1976 KZ400
1979 KZ400 LTD
1980 KZ1000 LTD B4
1984 YZ 490
1989 750 Ninja
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  • Grantl
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31 May 2010 09:15 #372286 by Grantl
I had that problem too. I took the throttle twist assembly apart and trimmed 1/8 inch off the the throttle return stop. This is the twist part where it bottoms against the return stop. Worked out well..

1981 KZ1000 CSR
1983 KZ750 Project Bike
1990 550 Zephyr
1994 KZ1000 P

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