I had my 2005 zx6-r 636 up to 170 on a looooooooonnnnggggg straight, it hung @ 169 then finally got itself up to 170, ive done it a few times since the first and it looks like 170 is it for my 05 that was all stock, im going to get a yoshi slip on and a new air filter from k&n then dyno and remap it. ill also be putting the stock chain back on that lasted 36k mi the first time around. ill let you know when i need the speed again haha