misfire

I have a 81’ 750k and when I went to start my bike back up from the winter cylinders 1 and 4 were cold. I stored bike with bowls drained and sea foam in tank. I tested spark outside of the cylinder and it was there but faint. Put spark plugs back in and cold cylinder. What could be my cause???

Hey guys, I'm new to forums and really am in need of help with this one. Last week I purchased a 1977 cb750 F1 from a chap. It seems to have a misfire on cylinder 3 causing a pop from the exhaust. I've thermal camera checked and that exhaust pipe is significantly cooler than the other 3 when...

Hi all, 1983 CB750F. I recently got the bike running after being sat in a garage for 10 years. I wired up some new coils, changed the plugs, rebuilt the carbs and connected a battery and she fired right up. After a few days of starting on the button, with the bike ticking over on the driveway...