The front cylinder was not firing last year. Changed the coil and all good, sort of. I put inline fuel filters in and did not like them at all (was running a little rough), so I took them off and replace the fuel line (was old and cracked a bit). Now the damn rear cylinder is not firing..staying cold. I used clear fuel line and I can see it running through. Took out the plugs and they were black and wet. Checked the gap (.03), grounded them and have spark (yellow). Put them back in. Its hard to start but when it does, it is running ok, except for the rear cylinder. Ear shave and difference exhaust. I know I need to rejet, but would that cause the rear cylinder to not fire???