I have a 2006 R with a PC3 and the bike is showing codes for no combustion front/rear cylinder. The bike runs runs fine until there is a load on it such as high rpm's, then it spits and sputters a bit and the check engine light comes on. I've had it to the dealers 3 times and they can not figure out the problem. The PC3 was replaced and its still doing it so i've eliminated that as the problem. Any help or suggestions would be appreciated. Thank you.