Could someone tell me what thread size the studs are that screw into the inlet port on a C15 head.

I want to fit longer studs to move the carb backwards but I'm useless with British thread sizes.

Secondly, does anyone know if they can be bought in longer sizes? If not I'll buy bolts and make studs out of them.

5/16 BSF. I bought set pins and nuts then cut to suit. ' Namrick' online do them up to 3" if your planning something really ambitious ..

Edit to add: just looked at their site, they do 1 ft of 5/16 bsf thread for

Edited July 9, 201313 yr by davetom

And the throttle cable...

Thanks for the info, most helpful