So the free bike was £200 as a non-runner with the added title of ,"runs well as far as I know!"
Got it home, charged up the new battery, put it in place. Hit the starter button, and .................................................. ................
the engine spun over but didn't fire up.
Off to Halfords for the Hyanes manual, and upon my return took the spark plugs out which were wet.
Put them back in and it fired up. Yippee!!!!!!!!
I then changed the coolant and the oil, put some more fuel in it. Had it running for half an hour last night with no problems. Gave it a damned good clean (long over due). Went to take it for an MoT this morning, and left it warming up on the choke. Whilst I was inside, getting changed, it died, and I couldn't get it to start again.
This afternoon I removed the plugs again, and then put it all back together. Got it to run, but after a couple of minutes it died again, and now it won't run at all. I've got the battery on charge at the moment, but if that doesn't solve it I have no idea where to start.
One thing I noticed was that the fuel tap might be on the wrong way and as the writing has worn off it I'm not sure which direction it should be pointing to put it on reserve.
If anyone might know what to check next please let me know.
I was reading the manual and it says that you have to buy the airbox as a complete unit. Is this true?

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Seems extreme to me, but what do I know?
Bugger all so far.