Hi all, I am having a strange problem with my bike. Basically if I am sitting in 6th and to a lesser extent 5th gear and the revs are between 6,500 - 8,000rpm it starts spluttering usually more so with light throttle. I have checked the air filter, fuel filter, replaced the spark plugs and even gapped them down to .7 but it still happens. If I am in 1st, 2nd, 3rd or 4th at these rpm it does not have this issue what so ever... Do these bikes have fuel maps that are set based on the gear you are in or anything like that. I have noticed in the past that after having the bike service by a proper shop it runs great for a few weeks then comes back. The only other thing I was thinking is if it's putting either too much fuel or not enough at these revs in this gear and may have carbon build up... As I said a little lost for ideas so if anyone can point me in the right direction it would be appreciated. Do people use the foaming cleaner like used on cars to displace any carbon build-up ???