New front gear ordered, I'll report my findings later. The old commuter, CBR 1000 F -92, pulled very well from 3 k to 10+k, I expect this bike to do the same. One reason for the below 7 k weakness on 5th and 6th gear, is the 300 km/h gearing on the Blackbird (the old bike was geared for 260 km/h). A 16 instead of 17 teeth front gear will certainly help to some degree.
16 teeth front installed and tested today. This is the perfect gearing to me, the bike is more responsive and the bad over-gear feeling on 6th disappeared . The rev is now exactly as I'm used to from the GSX R1000 -03, which is fine when changin between bikes. Some of the shifting roughness also disappeared. This is a highly recommended change for those who have more interest in overall performance (except fuel consumtion) than absolute top speed, and the top speed will only go down by 6 %, theoretically. I guess the top speed doesn't suffer that much since the engine will reach full rpm better.