Author Topic: I foolishly took my choke adjusting lever off my carb and can't get it back on  (Read 2834 times)

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Offline jeremyillingworth

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I was taking my 1972 carbs apart for ultrasonic cleaning and wanted to take them as far apart as possible to do the best job possible, so I took the choke arm and related components off. After cleaning I tried to get the nut back on the arm end, it would not go, it just wants to cross thread. I realize now that it was likely staked in place and I shouldn't have taken it off.

Has anyone else done this before? How did you get it back on?

Offline Deltarider

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What bike? What carbs? What made you think they needed ultrasonic cleaning?
CB500K2-ED Excel black
"There is enough for everyone's need but not enough for anybody's greed."

Offline jeremyillingworth

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Sorry, 1972 Honda CB750, stock carbs.

I cleaned them because it was sitting for several years and the slides were stuck with the bowls full of unpleasantness.

Offline BenelliSEI

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You are correct. Is the shaft buggered or the nut? Maybe a new nut?

Offline jeremyillingworth

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I think the nut is good.

I think the shaft was mushroomed out (intentionally) and the nut compressed it a bit on the way off and now can't get back on.

I was thinking about filing the end of the shaft down a bit but I thought I would check here in case somebody else had this problem in the past. Or maybe somebody needed to make a #1 carb out of a #3 carb in the past.

Online CycleRanger

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Yes that shaft is peened to hold the nut. You'll have to clean up the end to get the nut back on.
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline newday777

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"I was thinking about filing the end of the shaft down a bit"

Use a fine triangle file or a thread file to clean up the threads
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline pjlogue

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I took mine apart on my '76 750.  Yes, it's a #$%* getting the nuts back on!  Take a fine file and file the end of the threaded shaft at ~30 degrees from parallel to the shaft to remove some of the mushroomed out end of the threaded shaft.  this will allow you to start the nut back on.  once you get the nuts on put a drop of locktite on each.

-P.