One of my mates has just bought himself a second hand AJS Regal Raptor DD125 which now won't start. The starter motor sounds strong upon ignition but the engine itself doesn't kick in.
We tried bump starting it, and giving it a bit of gas (the tank is full and not set on reserve) which got it running for less than a minute before the revs dropped down and it stopped again. It got pretty wet a couple of days ago and he had to remove and dry the spark plugs before it would start again.
Anyone have any idea what the problem could be?