Here's the new head building video.
If rockers are radically lightened there is a serious possibility of breakage. Gus Kuhns a one time well known Norton race team and dealer advised against it.
Yes - radically rocker lightening can bring breakage and you can usually tell just by looking at the part to determine if its been dangerously weakened. But reasonable lightening (without going to far) helps guard against valve float and dropping a (raced) valve and improves reliability while reducing strain/wear. That's why I give dimensions of the rocker end diameter. As stock the rockers have some crudely made out of round overweight ends on
Thought yours pukka-I have seen them as thin as paperknives , not installed mind and one wonders how long they last .Something that puzzles me is that no one seems to have tried using titanium for the tappet locknuts, surely its a worthwhile weight saving for those building racing motors ?
ive got socket head adjuster screws... had unhappy experince with aluminium nuts they came loose ... where do you get yours from?