Late-ZB and BB Gold Stars as well as B33s adjust valve lash using variable-length tappets at the crankcase mouth, while CB, DB and DBD Gold Stars use eccentric spindles ("rocker fulcrum pins") for this purpose. Despite this, as the next figure shows, both types of rocker boxes are quite similar.
Assembling a rocker box is relatively simple. Although the illustrations in this thread are from a B33 rocker box I note where CB and later Gold Star models differ. The assembly procedure will assume you are starting from completely separate parts, so to disassemble a rocker box you would begin at the last step and work backwards.
-- Assembly lube
-- Loctite 262 (red, high strength)A.
Inspect the components to be sure you have the correct ones.
-- The circumference and operating arms on Gold Star rockers are ground to make them lighter than their B33 counterparts. For example, a BB Gold Star Inlet rocker is ~155 g (~165 g for a DBD) vs. ~180–200 g for a B33. However, even without weighing a rocker, if the casting number is still visible it is not
from a Gold Star.
-- The exhaust rockers of late-ZB and BB Gold Stars and B33s have a drilled passage at the pushrod end and a hole at the valve end to bring oil to the cap of the pushrod and the valve tip. Both holes are present on Gold Star intake rockers as well, but B33s only have the oil passage at the pushrod end. Starting with CB Gold Stars the ball and sockets were reversed and the oil passage at the pushrod end was eliminated and replaced with a hole directly over the pushrod.
-- Ensure the oil holes at both ends of both Gold Star rockers (and only at the pushrod end of a B33 inlet rocker) aren't blocked.
-- Rocker spindles ("rocker fulcrum pin") on CB, DB and DBD Gold Stars (bottom) have a hex head at the oil inlet end to operate the eccentric shaft while those on late-ZB and BB Gold Stars and B33s (top) are plain.
-- The spindles should have a diameter 0.5605" in order to provide 0.002" clearance in an unworn 9/16" rocker arm. Insert the spindles in the lifters and check that they turn without any feeling of resistance.
-- Clean the inside of the spindles and make sure the exit hole isn't blocked. Not all exit holes are in the same position, but this has no effect on function.
-- The banjo bolts for attaching the oil feed manifold to the spindles are not interchangeable. The bolt on the inlet side (65-317) has a much smaller hole than the one on the exhaust side (65-318). Make sure neither one is clogged.