The one shown in Pete's picture - the 'real thing' - can jam in the cable attachment at the butterfly end and allow the butterfly to remain partly open, another good reason for relocating the ignition switch in the headlamp where it is less difficult to reach. I've threaded a small washer over the n...

The bracket is 1024A-37 and the spring 6492A-37.

I've had the butterfly in the Solex freeze in the part-open position. I survived and moved the
ignition switch from its inaccessible position under the seat and set it up in the headlamp
where it remains to this day.

Yes, I always use them and for no better reason than that's what Ariel did.

Valve spring cup washer, Halite, 580-34 and seemingly available from
Draganfly and possibly others too such as the spares scheme.

For what it's worth 375 monoblocs without the threaded inlet were fitted to Arrows and Leaders
with the 376 fitted to Sports Arrows.

Thanks for the information and pictures. The front brake assembly from the Square 4 is clever design and well engineered. Do you know how the wheel spindle is arranged for the BSA brake? We had an attempt at that but the wheel spindle finished with a horrible step at one side which looked like a dis...

Very interesting pictures. I particularly like the VB with the red tank, girder forks and BSA front
brake, very much a rider's bike I think.

The Mk1 Square in the background of the picture has an interesting front brake too.

As far as I'm aware there was only ever one sort of alloy head for the 350 singles and that was fitted to the last series of engines fitted into the swinging arm frames. There will be two challenges: fitting the pushrod tubes - the later engines had them cast into the cylinder - and sorting an exhau...

Have you tried

http://www.arielownersmcc.com/members_o ... /Solex.htm

As for parts - if you find somebody I for one will be pleased to know who it is.

If you go for one of the many pattern types available one thing to watch for is how far the attachment tube protrudes from the body of the cleaner. In the original it protrudes 5/8" and has a spring clip to clamp it onto the chassis. If the pattern part is smaller you may have trouble using the...