yes he came up with that before the Germans came up with that design.

Neil,
not 'the usual suspect', but someone who decided to sell a flywheel after I'd condemned it as scrap metal.
Machining of the engine side had been taken straight down, to less than the diameter of the mounting on the crankshaft, so it was barely 3mm thick near its hub.
Also, so much metal had been taken off at the outer edge of the 3 slots that the ring gear was virtually self-supporting.
Not sure which bit will let go first, but the result isn't going to be pretty either way...

ken

( @ Dyane1976.
Same opinion of those adaptors for 123.
Even when the expander bolt had been tightened as much as possible, the grip was feeble.
Constantly variable timing?
Luckily, I'm having nothing more to do with this particular project. )





Visa engine by slcchassis, on Flickr

Hi Ken
I note your comments about the adapter for fitting the 123 Evo and also your photo of your Visa engine, how did you solve the ignition problem then. and is the adaptor a waste of time?

What I did with the adapter was drill 2 small holes (oposite to each other to balance it) and used a small alan key though the hole to the alan bolt below) to hold it in place when you tightened the centre nut. Otherwise the thing rotates as you tighten it. Make sure you tighten the 123 unit in the centre of the engine space (there is no lip as per on the 602 engine to hold it in correct place. If you do not tighten in the correct place the little pegs on the adpater could hit the little alan bolts on the 123 unit.

I've dug out my bracket and measured it. (It's different to the Burton one in the image that I posted previously).
You're right: it is 5mm thick.
Thanks very much.