I have decided that I will just leave it until I move back down south (where I usually live), and get it dyno tuned / rejetted when i fit aftermarket chambers/pipes.

Something a bit more sinister now! I decided to take the bike out today and see how it performed under WOT in 4th and 5th gear. Both times it would rev nicely until about 9-9.5k, and it just wouldn't rev above about 10k. So I decided to take a look at one of the plugs and this is what I saw:



The end of the silencers are quite black and sticky too:



The bike has recently had a rebuild, is running 95 octane fuel, and TTS oil. It's used mostly at sea level, average temp during the days is probably about 20-25 degrees and around 70-80% humidity.

From my limited knowledge I think it's running way too rich.

Thanks in advance for the help.

Tom