BST mikuni 34, fuel screw binds up

[cnap504]

I’m cleaning a set of mikuni cv’s from a 1981 GS1100E and one of the fuel screws will turn in maybe 2 turns and then stops.  Tried that particular screw in the other carb/carbs and no trouble so I’m thinking it’s the threads in that carb body.  Also checked to see if an old screw taper broke off in the body and no, it’s good.  Can I clean up the threads in that carb with a chaser/tap and if so what size is it?

 

 Thanks 

Edited December 27, 2021 by cnap504

[Wolf]

Take an old screw and cut groves into threads clean with a wire brush and U have a tap . . . 

 

[cnap504]

6mm x .50 ?

[cnap504]

Yep, 6mm by .50, worked like a charm 

[TonyGee]

good save