Hi, first post,my bike has a good spark on cylinder 1 but very weak spark at cylinder 4 ( same coil ) also cylinder 2 good spark cylinder 3 very weak spark again same coil , any ideas would be appreciated. I tried a newer spark plug that I know works and still the same,made sure the ht wire was firmly in the coil in the two weak spark plugs. I had the carbs cleaned last year so both cylinders having the same problem at the same time this year is a bit of a stretch.I have a multimeter but not sure what to check. Thanks in advance for any help or is more information needed. Ian