Fuel mix screw orings

[sid693]

I lost a fuel mix screw to the road and ordered a couple new ones. The replacement screws had an oring too large for the port. What is everyone else using for Owings? Bs38 78 xs650 pod filters and such

Thanks
Sid

 

[5twins]

I have been using a 1.5 x 3 but it is a rather snug fit going into the hole in the carb body. Lubing it up with WD40 helps it slide in as you install the screw. I recently got the next size smaller, 1.5 x 2.5, and I think these will fit in easier.