Thanks for the support, fellas.
I learnt a long time ago, whether it's relationships, vehicles or whatever, there comes a time when you have to face the fact you're flogging a dead horse. I have reached that point with this bike. Maybe these continuing problems wouldn't bother me so much if it hadn't been a similar situation throughout the restoration, but I'm not prepared to carry on with a bike that’s going to be a perpetual ‘what’s wrong now’ scenario (and that’s assuming I could solve this latest mystery).
I had that with a Velocette in the mid 60’s. Frame kept breaking where the bottom rail met the downtube, the kickstart was a crappy design that bruised your ankle, but the final straw was the auto adv unit. It had a hole drilled in the taper to locate a spring. Result was if you did it up tight enough not to slip it split – and slipped. The bike went to our local dump.
Then my Triton. I didn’t like the handling, couldn’t ride it at night because the alternator couldn’t keep up with the lights, and got fed up with having to clean the clutch plates every couple of days to prevent the slip which prevented it going over compression fast enough to strike a light. I sold it.
Now the A10. Even more grief than the Velo or Triton. After so much work sorting out wear and tear and others’ bodges, I’d hoped for a reasonably reliable bike - like my other ones, which I just start and ride.
It's a lovely looking bike and the frame handle well, but the engine is more trouble than it’s worth. As an engineer I simply cannot tolerate unreliable machinery.
So, as others have advised, I’m going to keep away from the bike for a while, because otherwise I’m likely to take a lump hammer to it. Indeed, if my mate hadn’t been with me yesterday I would have done just that.
But what to do? I believe there’s another member with a Sunbeam giving him similar grief. Won’t go so you can’t ride it, and can’t sell it either. I’ve discounted the idea of fitting another make of engine, as I’d still have the leaking fork and rubbish brakes. Whatever I decide, this bike will be gone one way or another. And soon. The crusher is looking very inviting.