Author Topic: rounded screw in carb slide.  (Read 336 times)

0 Members and 1 Guest are viewing this topic.

Offline katman

  • Enthusiast
  • **
  • Posts: 207
rounded screw in carb slide.
« on: March 26, 2024, 06:08:13 AM »
Is there anyway to get the small screw out of the carb slide on the early style carbs for Cb750. Starting to round out.

Offline willbird

  • Expert
  • ****
  • Posts: 962
Re: rounded screw in carb slide.
« Reply #1 on: March 26, 2024, 07:44:00 AM »
Down inside that holds the needle down ? I tore apart a set of carbs and found a red loctite on that screw. But I gave it a bath in the hot ultrasonic then tapped a good JIS screwdriver into the screw with a hammer, then it came out. Benelli said he has boiled a few to loosen up that screw.

Vessel makes a normal looking screwdriver that is an impact screwdriver, I have not bought any yet.

https://www.vesseltools.com/handtools/screwdrivers/megadora/980-series-detail

Would need to make sure it is JIS.
« Last Edit: March 26, 2024, 07:47:27 AM by willbird »

Offline MauiK3

  • A K3 is saved
  • Old Timer
  • ******
  • Posts: 4,279
  • Old guy
Re: rounded screw in carb slide.
« Reply #2 on: March 26, 2024, 07:53:51 AM »
Yes, be sure to use a JIS screwdriver. A Phillips will ruin it.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline katman

  • Enthusiast
  • **
  • Posts: 207
Re: rounded screw in carb slide.
« Reply #3 on: March 26, 2024, 09:15:41 AM »
Yea, used set I bought. Someone has been in them before. Was using my JIS. I didn't try tapping on it though.

Offline willbird

  • Expert
  • ****
  • Posts: 962
Re: rounded screw in carb slide.
« Reply #4 on: March 26, 2024, 12:29:55 PM »
Yea, used set I bought. Someone has been in them before. Was using my JIS. I didn't try tapping on it though.

If they used loctite you might be able to see it from the bottom side. I know somebody had been inside the set I got from Ebay because the mainjets were Nylon or some other white plastic LOL.

Offline Flyin900

  • Expert
  • ****
  • Posts: 986
Re: rounded screw in carb slide.
« Reply #5 on: March 27, 2024, 05:04:58 AM »
Use some heat on the bottom of the threaded part in the slide and a proper JIS screwdriver that you tap into the damaged threads and it should release. Even if there is no Loctite the varnished gas on the threads lock it into the slide body.
Common sense.....isn't so common!

1966 CL77 - 305cc - Gentleman's Scrambler
1967 CL175K0 - Scrambler #802 engine
1972 CB350F - Candy Bacchus Olive - Super Sport
1973 CB350F - Flake Matador Red - Super Sport
1975 CB400F - Parakeet Yellow - Super Sport
1976 CB400F - Varnish Blue - Super Sport
1976 GL1000 - Goldwing Standard
1978 CB550K - Super Sport
1981 GL1100 - Goldwing Standard
1982 CM450A - Hondamatic
1982 CB900C - Custom
1983 CX650E - Eurosport
1983 CB1000C - Custom X 2 Bikes now - both restored
1983 CB1100F - Super Sport - Pristine example
1984 GL1200 - Goldwing Standard