Ok due too the fact that I was givin the wrong info by the guy that I bought the bike from , I purchased and installed a set of renthal sprockets 14/45 . Worried that that set up will be to much for the bike here are my options on gearing. 15/43, 15/45, 14/43, or 14/45 ? The initial setup was 15/43 which the original owner said was a stock setup , I didn't think that it was enough low end grunt so I wanted a -1/+2 setup and opted for the 14/45 renthals , then I came to realize that 15/40 is the factory setup. Do some zx6r' s come with the 15/43 setup cause i could have sworn that in my earlier searches I seen those numbers ?? If anyone has any of these setups it would be great to hear some feed back .