So I would go with a sprocket carrier AEM, renthal or Sitta, and a selection of rear sprockets 41 42 43. they are all a much of a muchness but the AEM seems to be more available than the renthal.
You say you were going around Brno at 2.32 and want to improve. Clearly your bikes std gearing wasn't correct for that track and I doubt you even revved out in 5th let alone 6th. I was running a 42 rear and going around in 2.19 and not using all the revs in 6th on the front straight. My pal was going around in 2.12 and he was running a 43 rear.
Having the availability of sprockets to change gives you scope to alter which part of the rev range you are using, which gear the bike is running for which part of the track. It makes it so much better and easier with less gear changes up and down. So Brno out of the hairpin turn 3 1st, short shift 2nd 3rd up to turn 4 then you can use the revs all the way up to the limiter no more gear changes before braking for turn 5 left at the media centre. Of course sometimes you have to compromise a part of the track.
Of course you need a longer chain to accommodate the different sprockets so I would go with DID erv range although tsubaki are good but its a different tool to fit.
Running the new chain longer than the std length to be able to use the bigger sprockets also means your wheel base gets longer and your ride height will alter too......so to keep a constant you'll need something to alter or correct that back.......
also as I doubt there is much wrong with your original stuff when you remove it keep it all to then put it back on when you sell the bike you'll only need a new soft link!
still, its just bling...
which is a much more valid argument than saving 700g in weight which is less than a pasta lunch at the Brno restaurant!
