Max, What are your thoughts here? I was riding home last night when the engine all of a sudden lost power. It would run, but it sounded like my old Briggs and Straton 5hp lawnmower. I pulled over to the side of the road and pulled off my pcrIIIr to see if that may have been the cause. It was not. I limped the bike home and checked the codes. P1356 came up. That tells me the rear cylinder is not firing. The bike has about 5700 miles on it and the plugs haven't been out of it. Any ideas on what it may be?? The problem seems to be intermittent. I can start the bike up and it will sound fine for about 10 seconds and then it will lose a cylinder. Sounds like an electrical problem to me but I'm no expert. Thanks in advance for any help.