@Dave Pearce you'll notice that there are also a lot of "in jokes". Don't be put off by this just join in if you want.
One other thing that might be an easy fix (unless you are me!!) the M25 was......well...the M25, nose to tail and when I was braking behind the traffic the van kept cutting out. I kept having to blip the throttle, brake, come off the brake to blip the throttle again to stop it cutting out
I had similar behaviour with ours and it turned out to be the fuel cutoff solenoid on the carb wasn't screwed in properly. Does it idle ok?
Not sure on that. Mines got a posh rack on it. Back in the day I had a few 1303’s and they all had worn out steering boxes. You could try mega bug.