Horrible rebuild results!?

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06 May 2010 16:41 - 06 May 2010 16:42 #366006 by polkat
Replied by polkat on topic Horrible rebuild results!?
Well, the carbs are off the engine, so I can't try the no-cable to see if it still stays revved, but that cable is not kinked and quite smooth, and I could both see and feel the linkage closing fully every time.

I have not pulled the pilot screws yet, but I will check for the O rings. Valve clearances were closely checked while putting the top end back together.

Yep, checked the advancer and no problems. I did notice that two of the carbs didn't have the sealent I used all the way around the carb throats, and I suppose that could be an air leak area.

As everyone knows, the four carbs are bolted onto two bars to make them all a single assembly. If I seperate them for cleaning, will I have a problem later rigging the throttle and choke linkages, and the fuel tubes back together. I see nothing about this in the manual?
Last edit: 06 May 2010 16:42 by polkat.

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06 May 2010 19:28 #366070 by Link14
Replied by Link14 on topic Horrible rebuild results!?
When I had mine off, I looked long and hard about separating the carbs. I can't remember exactly how the connection was made but the choke butterflies looked like they were going to be a bugger to reassemble. In my opinion, there isn't any cleaning you couldn't do with it in one piece that would really make a difference in the performance.
Again, just my opinion

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06 May 2010 20:16 - 06 May 2010 20:19 #366082 by polkat
Replied by polkat on topic Horrible rebuild results!?
Sounds good...one less thing to worry about! I'm ordering new jets and head to carb boots from Z1, the last of which I think might be the actual problem with the rev thing. I'll report back on how it all works out.
Last edit: 06 May 2010 20:19 by polkat.

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06 May 2010 20:22 #366084 by Patton
Replied by Patton on topic Horrible rebuild results!?
polkat wrote:

...did notice that two of the carbs didn't have the sealent I used all the way around the carb throats, and I suppose that could be an air leak area....


The Moto 1 sealer used on the old cracked manifolds (discussed elsewhere) is likely failing to prevent air leaks. Altho touted as fuel-proof, perhaps it isn't heat-proof.

To my knowledge, there's no product that satisfactorily works long term in this application.

Here's the pic from the other thread. To me, these seem pretty much beyond hope.

Good Fortune! :)


1973 Z1
KZ900 LTD
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06 May 2010 22:33 #366110 by polkat
Replied by polkat on topic Horrible rebuild results!?
Yea, that's why I'm getting replacements. To be honest though, I couldn't find any visual leaking at the head side of those (I had also spread a thin coating inside at the joint). No cracking in the Moto 1 stuff that I could observe either. The stuff is supposed to be good to 350 degrees. Not the hottest I guess, but over 350 degrees would probably burn the rubber a bit.

But at the other end where the carbs push in, the stuff did spread around a bit. Still, new will be better, although I'll probably seal the new ones as well.

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