Have you tried a squirt of Aerostart down the intake? It could be there is still a bit moisture lurking somewhere which is diverting some of your elecktrickery to ground. If you can get it running (even roughly) on Aerostart it may warm up enough to dry it out or shake it loose. Another suggestion is to use a hair dryer if available and play that around any areas where ignition voltage may be present.

Another trick is to rub lead pencil over the plugs electrode and anode, this will magnify the size of the spark.

None of any of this is worth a squirt if none of those things are on board.

Thank you for the info. Guys ! I do have WD40, hairdryer and lead in my pencil. I'll try the ideas tomorrow and keep you'se advised.

Start You B....d - I'm referring to the product.

G'day those sailors who offerer good advice. The blxxdy thing would not start for me and I was obliged to visit a Yamaha dealer. The problems were many-mainly sand in the carbie and in the reed valves,besides the power generator under the flywheel.
With my relative inexperience, it was probably a good thing that it didn't start as sand could then have entered the crankcase and bearings.Cheers, Bob