Hi, I just bought an 1970 750 Commando to restore. Its my first Norton so I am a newby. The bike is fairly standard and mostly original, but had a nasty shock when I found the frame was twisted.
Still while thats being sorted out I am checking the engine out. Most seems ok to me but there is a weird 'mod' on the crankcase behind the oil junction block.
I was going to post a photo here but cant yet. Anyway, someone has drilled a small hole in the case and put a screw in it. I cant see that in any parts book so I think its a mod.
Any ideas what it's for and what would happen if I took the screw out?
Thanks
Steve
PS can anyone tell me how I can post a pic?

I was going to post a photo here but cant yet. Anyway, someone has drilled a small hole in the case and put a screw in it. I cant see that in any parts book so I think its a mod.
Any ideas what it's for and what would happen if I took the screw out?
Thanks
Steve
PS can anyone tell me how I can post a pic?