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Cracked Choke Tube 18 Mar 2015 15:03 #664866

  • daless
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Finally identified (most likely) the cause of an issue I've been ignoring for a couple years since my original set of VM29s got stolen. On cold starts when I needed the choke, or rather enrichener, to start her she'd surge to about way too high then die unless I quickly turn it off and turn up the idle, which in turn would need to be lowered back down gradually as she warmed. Super annoying.

Looked more into it today and found a small fracture in #4's tube that draws up fuel for the starter system. The tube is fixed in the carb body, so it looks like replacing it myself is out of the question. Any recommendations aside from sending it down to Wired George?
'77 KZ1000A1 - Mikuni VM29s, Kerker 4-1, K&N pods, LTD mags, Z2 seat

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Last edit: by daless.

Cracked Choke Tube 18 Mar 2015 19:26 #664892

  • Patton
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Is the crack accessible enough to seal it with solder or JBWeld?

Good Fortune! :)
1973 Z1
KZ900 LTD

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Cracked Choke Tube 19 Mar 2015 18:24 #664977

  • daless
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It is. I thought of that but wasn't sure if it was a good idea. Patton's blessing is good enough reason to give it a shot, though.

I am noticing now that the other three carbs have either smaller cracks or lines that look like the beginning of cracks on the same tube. I'll try some JB, but if that doesn't do the trick I'll send them down to the professional.
'77 KZ1000A1 - Mikuni VM29s, Kerker 4-1, K&N pods, LTD mags, Z2 seat

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Cracked Choke Tube 20 Mar 2015 06:55 #665016

  • Tyler
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I have had to solder one together, it I would recommend that before JB weld.

Attachment Pickuptube.jpg not found

If I knew what I was doing all the time life wouldn't be any fun.

'80 KZ650 E 700cc, dyna ignition and coils, frame up restoration, daily driver
'81 KZ1300 A3 full restoration, custom big bore pistons, 1400cc 6 cylinder super bike
"77 KZ650 B1 - Barn Find, work in progeress
"74 Yamaha DT 400 Enduro
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Cracked Choke Tube 20 Mar 2015 07:11 #665018

  • SWest
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Solder. I wouldn't put JB weld in a carb.
Steve

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