Thanks Ian, is that a Z1 you have there? the only real difference I can see is that the bottom plate is bent in such a way as to locate on a lug on the single down tube of the frame. I think the friction disk off of a BSA M20 should do the job nicely.
Whilst your there, if it is a model Z1 you have, how is the Lucas Magneto secured to the top of the crankcase as the none of the magnetos I have have protruding parts at the base to clamp down onto.

Chris

Here are the photographs as promised.  The friction disc is made out of clutch material.. It's about 6mm thick.

I will get you some photographs of mine in the next couple of days when I get home. There is a friction disc between the anchor plate and the underside of the head stem. The anchor plate has a nut welded to it so as you screw the knob down to tighten the friction disc. There is a castellated locking nut with a split pin right a the very bottom of the threaded rod. When you turn the knob the whole rod turns and increases the friction between the anchor plate and the frame.  That's a difficult thing to explain. Photos following. 

Hi everyone,
I am attempting to assemble a foot change gearbox on one of my Z1 750's.   I can't seem to get the selector working properly. The selector works fine inside the gearbox and all gears select easily and the detent pin is holding location correctly.  The outer casing that houses the kickstart ratchet and the foot change selector system is giving me trouble.  The photograph shows 3 numbered items and my question is ......can anyone tell me if these 3 items need to be in some sort of special location in relation to each other when assembling the case. AND does the gearbox need to be in a specific gear when the end case is assembled.  I hope one of you guys has done this before and can give me some advice.

Hello Andrew, Chris came to see me today and unfortunately your kickstart lever is not suitable for  his motor, but thanks for all the communications

Hello,

will get back to you. 

Martin

Can anyone recommend a good engineer who can reassemble rings onto pistons and pistons into bores etc near Marlborough / SN8. I have snapped 2 rings so far, I need someone who has skill and not 10 thumbs. Anything from just gapping and fitting the rings for me through to reassembly and fettle to get it running well. I can deliver by trailer.

Thanks

Simon Hewitt

Quote from: martin1 on 01 Dec 2024 at 20:06 Hello Chris,

I have bought mine 5 years back from the club. If they are out of stock you could have my set. I have never used them.

Cheers

Martin

Should Chris not want yours I would be interested for my Mk 4.

Hello Chris,

I have bought mine 5 years back from the club. If they are out of stock you could have my set. I have never used them.

Cheers

Martin

For sale one set of EW 350 crankcases. with incomplete crankshaft. Tapered end of crankshaft is rusty but comes with replacement  part for this bolt up crankshaft Incudes two conrods and other ancillary parts Engine No.           
YE 15636  £100 ono