B Pipe- Tiny cooling hole size??

[300swap]

Hey Guys, can anyone tell me what size of hole the small cooling holes are.

I have a old factory pipe with out the adjusting screws in it so I ordered the oversize kit and got it drilled and tapped, just need to drill out the tiny holes still. I just did the top and bottom, leaving the middle un-drilled.

Any help would be cool!!

 

[augustaf]

those holes are: 0.0550" ( called 55 thousands) = 1.40 mm. The drill size is #54. If that is to hard to source -some hobby or R/C stores might have it, you could possibly use a more popular 1/16" which measures 0.0625" ( 7 and a half thousands larger). That should still work, since the point of the screw is sufficiently large to cover that size hole. The screw size originally is 10-32.

 

[300swap]

Hey thanks a lot, now i just have to find one that small