This is the 2nd time I've gotten a code of 1353, front cylinder no combustion. Check engine light comes on for a few seconds then it goes out when riding and rpms are 2000-2100 and I slightly give a little increase in throttle. I did add a TFI recently but doubt if that has anything to do with it since the last time I got the code the bike didn't have the TFI. This is on an 07 ultra classic. Would the spark plugs cause this? or What??