Pilot screw snapped

[Screechers41]

Hello, I recently purchased a 1981 Cb750 custom and it has the issue with the idle hanging when coming to a stop. Before I tore into it to check valve adjustments I wanted to verify pilot settings. I noticed 3 screws were accounted for and the 4th appears to have been snapped off. Would a small easy out be my best bet? Open to suggestions...

 

[brettp]

That adjustment screw is brass and pretty pliable (compared to other metals), so you might be able to get a flat tip in there to turn it out. Unless of course, it is seized for some reason. Look up a pic of that screw so you can see what sort of size extractor you'll need. It likely needs to be pretty small.

 

[Loose Chain]

Go and buy yourself a small "Left Hand" drill bit. Maybe 1/8th or so. Make a small punch mark in the center then use a drill going counter clockwise. The counter clockwise motion of the bit as it's grabbing material will probably grab and spin the screw out. Done it many times. I have a set of left handed bits just for this purpose. You can probably get a cheap set at Harbor Freight.

 

[Screechers41]

Go and buy yourself a small "Left Hand" drill bit. Maybe 1/8th or so. Make a small punch mark in the center then use a drill going counter clockwise. The counter clockwise motion of the bit as it's grabbing material will probably grab and spin the screw out. Done it many times. I have a set of left handed bits just for this purpose. You can probably get a cheap set at Harbor Freight.

Thanks! I have a left handed drill set and didn't think to try that. I wonder if I can get in there without pulling the carbs...

 

[Loose Chain]

Thanks! I have a left handed drill set and didn't think to try that. I wonder if I can get in there without pulling the carbs...

You will most likely have to pull the carbs off I'm afraid.

 

[Loose Chain]

Thanks! I have a left handed drill set and didn't think to try that. I wonder if I can get in there without pulling the carbs...

How did you make out?

 

[Screechers41]

How did you make out?

Still waiting on the carb parts. Should be here later this week so carbs will be off in the next couple weeks. I'll report back when I work on it

 

[Loose Chain]

Still waiting on the carb parts. Should be here later this week so carbs will be off in the next couple weeks. I'll report back when I work on it

Did you get the broken piece out?

 

[Screechers41]

Did you get the broken piece out?

Not yet, still riding it

 

[Screechers41]

Well I used a 3/16 left handed drill and it came right out no issue. Easy peasy

 

[Loose Chain]

Well I used a 3/16 left handed drill and it came right out no issue. Easy peasy

Good to here.