Hi again.
I said in my last post the front end of this project was a saga - well the sga continues.
One objective was to replace the single speedo arrangement with a tacho & speedo. The tacho was pretty expensive but the other parts were quite reasonable.
I've just got to the bit where I mount the speedo and tacho plate (complete with speedo & tacho) to the top yolk - and it doesn't fit ! The plate is flat and expects to be sandwiched between the stanchion top bolts and the yolk ends as well as by 2 small bolts in the middle that bolt to small bosses on the yolk. Since the plate is flat I expected the top of the bosses to line up with the tops of the yolk ends where the stanchion bolts fit - but they don't ! They're about 3.5mm higher than the yolk ends - see attached photo.
So either I have the wrong yolk - and the bosses should be 3.5mm lower, or else I should be fitting 3.5mm spacers underneath the mounting plates uner the stanchion bolts. The problems with the latter are :
a. There's no mention of spacers in the parts lists and diagrams.
b. I'll need longer stanchion top bolts. I estimate, with spacers in place, I'll only have about 3-4mm of engagament between the bolts and the stanchions - and that doesn't feel right.
Since having both tacho & speedo was an option for a 1962 Super Rocket, and there's only 1 parts number of top yolk for that year - there must be a solution - but I don't know what it is. The impatient me wants to cut 3.5mm off the bosses - but the more sensible me thinks I ought to get some advice from people who've been here before.
Any advice would be most welcome.
Kind regards - R