10-08-12, 01:29 PM
(10-08-12, 11:14 AM)red98 link Wrote: [quote author=Fazerider link=topic=4131.msg34198#msg34198 date=1344592538]
If it's not electrical, a good next step would be to run the engine for a moment (or at least try to) then whip the plug out.
If it doesn't smell of fuel it's not getting enough which would suggest a blocked jet or supply pipe.
On the other hand, if it's soaked in fuel that would point to a stuck float, duff choke plunger or a jet that's way out of adjustment.
yes as above.....its either sparks or fuel.....when was the last time the carbs were cleaned / balanced

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The carbs were balanced 2 mths ago but i've not cleaned them before. However, the bike has been used daily and hasn't sat for any length of time.
The way it happened so abrubtly (ie, bike runs fine, fill with petrol and start on 3 cylinders) makes me think that it was an ignition failure or some crap blocking something. Guess it's likely the crap now so i'll start investigating when I get time