counterbored to take a sleeved nut, which I assume requires shorter studs in the inlet end of the rocker box,
only have one alloy head but the rocker studs are long (all four), do you have the correct sleeve nuts, there are/is different sleeve nut/s used elsewhere on the bike.
Also requires special washer to sit between sleeve nut and head, and as I recall it takes a bit of fiddling about to get the sleeve nut up into the counterbored bit and started.
Hi Bill
I don't have any sleeve nuts for the rocker box studs just plain washers and nuts.
You say that all of your rocker box studs are long? What length are they?
I can only estimate mine as they are on the bike, but the front one look to be about 1 3/4" - 2" and the rear ones about 2 1/2" - 2 3/4" long. If the front ones were any longer I would not be able to get the nuts on between the gap in the fins at the front.
From the photo you can see that the rear studs are long and have to be screwed in after the rocker box has been lifted over the push rods. There is also insufficient thread to take a sleeved nut. As previously indicated a friend has a 57 RR and 60 SR with the same arrangement with long rear studs and no sleeve nuts?
How long is the sleeve on the nuts which I assume go some way up the counterbore? Can you remember if the ends of the studs are hidden inside the counterbore?