I got it working
I have to take part of the blame as I caused a short circuit from the earth wire on the pump straight across the battery positive, this literally melted the wire and because its a relatively thin wire me and next door neighbour were able to cut the harness insulation back to the point where the earth wire had burnt out. Fortunately no insulation damage was done to signal or power wires. A bit of work with rthe soldering iron and some heat shrink insulation fixed the positive and we ran a completely new earth wire from the connector back to the chassis. (Used a mounting bolt off the coil.)
It all tests ok and no smoke or nasty smells and started 2nd kick now that I have a functioning fuel pump again.
Whilst I hold my hand up to the croc clip managing to touch the earth return off the connector plug, it begs the questions:
1) Why are the wires and connector to the fuel pump routed right beside the battery positive terminal? All it took was a tiny bit of exposed conductor and "phut". I never heard or saw a spark so maybe the clip moved while the battery was on charge overnight, being an optimate shorting out wouldn't have harmed it and once the short had burnt out the charger will have reset. I was very lucky I didn't have a VERY serious fire in my garage.
2) at some point before I owned the bike it's obviously had a new battery and the connectors were on the side of the battery, on the INSIDE and very close to frame parts and wiring harnesses, one to watch I think and I will have to look at a better way of connecting the battery to avoid accidental shorts. I think its scary to have battery connectors immediately below the outlet from the fuel pump, not something I have seen before on a motorcycle.
The bike is now 2 1/2 years old and well out of the 3 month used warranty I got from Watsonian, so I feel it is unfair to have a bash at them, especially as they offered to help with the cost of parts if indeed the fuel pump had failed. I shall have a word with them in the next few days and let them know what I found, so that they can be aware of this potential problem.
It's probably not fair to knock the bikes too much, I know what I was getting into in respect of it not being a supersmooth reliable Japanese brand bike. I knew it would be slow and vibrate a bit etc.
What I hadn't bargained for was the very "Third World" standard of electrical wiring, Major car manufacturers are getting vehicles built/assembled in India so it figures that they are very capable of producing goods of a good standard.
I have the notion to try and strip the bike down as much as I can and see if and how I can improve the wiring.
Anyway, "Darjeeling" rides again, and Mrs Nut and I have some wheels for touring on when we take the campervan and bike trailer away tomorrow.
I'd like to pass on my thanks to all, and especially Gwill for the lovely big colour coded wiring diqagram which is readable in much the same way the handbooks one isn't! Saved a lot of head scratching over what to do about the earth return as we didn't want to even try repairing the burnt out original.
Thanks gents.
Andy.