Hi

I bought a new seat for my 58FH from Leightons:

https://www.rk-leighton.co.uk/

They're not the cheapest but the quality of their product is excellent - give them a call, Andrew is very helpful.
Regards Mick

Hi Dennis

Have to agree with Simon - the chainwheel on my 58 FH is fitted the other way around though your main shaft looks very similar to mine:
I found the Draganfly website very useful when determining assembly order of various systems.

Regards Mick

Hi It's a personal choice, but in view of the fact that a brand new original specification 376 Monobloc can be purchased for a cost similar to a new, non standard, Concentric, I'd go for originality every day. When I buy restoration projects originality of parts is always an important consideration....

Hi

Roger has said the thread should be 5/16" Whitworth, this has a 55 degree thread angle as opposed to that of 60 degrees which BSCY has. My first move would be to get a correctly threaded adjuster and try it for fit, you may find that this will resolve your problem.

Regards Mick

Hi

If the damage is to the frame thread then in my opinion the best and least intrusive method of repair is by wire thread insert, ('Helicoil'). This will remove the minimum of material from the frame and retain the original design adjuster components.

Regards Mick

I'd thought the engines were the earlier type, pre-alternator and that the coil ignition timing cases had been added. Hi I hadn't considered that. The primary inner looks to be drilled and tapped for cover screws and is missing the flange for the band clamp suggesting the cases are the alternator a...

Hi Thanks for the registration info, can't see them getting an age related plate nowadays for 'substantially modified' reasons. The swinging arms are modified AMC ones, (one early in keeping with the half width hub and one later mated with the full width hub), the damper lugs have been moved forward...

Hi Yes, lots of work and a nice result but not very much AMC. The engines and gearboxes could be period, (though not the same one ;) ), as could the teledraulic forks. No idea where the tanks, mudguards, rear frames and suspension comes from. Seems to be a lot of hand made components of pretty good ...

Hi Simon

Are you sure? that would mean the shaft was free to rotate in the bearing inner. I've not refurbished a BAP gearbox before but what is the function of PN 3118-48 pg 53 of the Draganfly catalogue?

Regards Mick

Hi Had a nice Christmas gift from my son this year, it's an illuminated Ariel sign to the design of the circular tank badge. It's 48cm in diameter and has an LED loop light, (the yellow ring in the photo). It was custom made by a work colleague of his and I'm well chuffed with it :D :D Workshop Sign...