Well, it finally happened

I removed the rocker spindle plate on the left exhaust to replace a gasket and discovered that the spindle had drifted in approx 1/8" and turned 90 degrees. I am going to make up aluminum spacers tomorrow and install them on the inboard side of the spindles. The tabbed spindle plate is marginal as it is and after the spindles have been in and out a few times the hole is worn. Time to think about spacers as mandatory on head rebuilds.

A thicker rocker spindle plate, drilled and tapped for a 4mm thread to protruded into the rocker shaft slot is a success fix for this.

Like this:

And the full kit

Fast Eddie said:

A thicker rocker spindle plate, drilled and tapped for a 4mm thread to protruded into the rocker shaft slot is a success fix for this.

Like this:

ONE PIECE ROCKER SPINDLE LOCATING PLATE

POLISHED STAINLESS STEEL DRILLED AND TAPPED TO ACCEPT 4MM GRUB SCREW. SEE 067579M FOR FULL KIT. SHAPE IDENTICAL TO STANDARD NORTON TWIN CYLINDER ENGINE BUT

www.rgmnorton.co.uk

Click to expand...

Nigel - what does the grub screw bear on - just the end of the spindle?
i.e.: does it just provide thrust on the spindle or does it prevent rotation?

Edit: Kommando's link had instructions https://s3-eu-west-1.amazonaws.com/rgmnorton/fs/pdf/067579m_rocker_spindle_instructions.pdf

The grub screw locates into the slot in the rocker shaft (as I understand, I’ve not used them) and looking at the full kit posted by kommando it contains some ‘slotted cap screws’ which are actually nuts (female thread) so I guess these are used at lock nuts?

Or one could achieve the same effect by putting a large blob of weld , and carefully grinding it to fit inside the slots. . .

I have the kit on my 99. Works fine but really needs some slightly longer bolts and a dab of locktite to keep the locking caps from going awol.