Boyer timing and engine starting issues

Hi All,

I've had my 1958 ES2 engine re-built thanks to Mike Pemberton, and over the weekend I put it back in the bike. The bike has a boyer electronic ignition originally fitted by Al Osbourne. I timed it up at 38 degrees before TDC, on the compression stroke. It fired up easily, and after fine tuning with a strobe light it was running great. But, on the first test ride down the street, the engine cut out, and it would not start back up...

I thought I may not have tightened up the distributor locking nut fully and it had moved which upset the timing, so tonight with my father in law Peter Sinnott, were did the timing, but to no avail as it doesn't sound like it wants to start... not even a cough.

I've checked that the battery is charged fully, and there's a strong spark. I've stripped down the carb to ensure the jet is not blocked in any way, and that fuel is getting to the carb ok.

So I've got fuel, spark, compression, and the timing is set, what am I missing? or what else could have gone wrong? I'm at a loss as to what to check next.

Can I also double check with those familiar with a boyer ignition that it should be set up so that at 38 degreees before TDC I can see the small screw on the metal plate through the timing hole before the coil?

Thanks

Aled