Honda-SOHC

That sounds the answer Julie, do you have any idea how he did it?

I know the very basics of how he did it but I'll ask Graham for more info later. Also, PM me over your email address and I'll send you some photos.

I've got keyless fitted to Millie, my 550 Mongrel. Graham made up the wiring and fitted a hidden master isolater switch and one of the handlebar switch gear slide switches as another isolater and the original start button starts the bike.

I removed the left side top silencer, loosened the clamps on number two front pipe to find a nice stress free position. Lightly nipped up the clamp on number two port.
I removed the bracket from the upper silencer then re-fitted it as previously. When re-attaching the bracket I could see that the top slot needed a little opening up at the top of the slot to allow the upper exhaust to drop down a tad. A small amount seems to make a difference at the tail pipe end. It all went together well except when clamping the hanger bracket it wanted to pull out of the balancer joint. The Delkevic top bracket has a half circle reinforcing plate attached to the bracket. If I fully tighten the hangar bolt it starts to tip the rear of the silencer.

I'm chewing over the options - might try and fit a sawn in half washer to keep it all flat at the same angle .

Update Just used a slightly thicker stainless washer that has a slight dished shape, fully tightened the nut on the bracket all stayed in place.

Excellent progress Ted. Running by the end of next week?

Just noticed my Chihuahuas photo bombed my exhaust pic. 😁