1996 xcr 600 sp mis firing i can feel one of the cylinders spark then stop any info would help.
I usually put in 2stroke heet (red bottle) to eat any water in the gas...will make engineers burn the water 1/2 bottle per sled tank full..if you have more than one sled.usually on the first ride out of the season...Like posted above, remove the plug boot form the end of the wire and cut 1/4 inch off the end of the wire, then screw the plug boot back on. Gives you a new connection. If that doesn't help, swap a coil from one of the good cylinders to the one in question. If the problem follows the coil, then you need a new coil.
Also, just make sure your carbs are cleaned and it has fresh gas and plugs. A little water/old gas and almost fouled plugs will obviously run like $hit too. Good luck