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A little trick I use to check a cylinder that isn't firing is this, as the bike is running I remove the sync screw from the manifold of the cylinder in question and shoot WD-40 through it. If the plug has spark then it usually starts running when the WD-40 is sprayed into the screw hole.
You may try this too to get it started long enough for the fuel pump to refill the carbs.
A little trick I use to check a cylinder that isn't firing is this, as the bike is running I remove the sync screw from the manifold of the cylinder in question and shoot WD-40 through it. If the plug has spark then it usually starts running when the WD-40 is sprayed into the screw hole.
You may try this too to get it started long enough for the fuel pump to refill the carbs.