well for the 09 I must say it has woke right up after the 800KM range and now it just wants to keep its front wheel in the air all the way to 3rd gear.... I figured it's past "my break-in point"and now I can abuse it some what...so I can only get it to 153KM/H and no faster on flat land...not too bad for a KLX[8D]...
as for the 13T front I put it back on the bench and stuck with the 14T stocker...no complaints with the 13 just too high rpm...the 14T seems to bring the wheel up just fine....
this little bike is not a jump/freestyle type bike...long story short 40' air and I came down REALLY REALLY HARD!!!!but luckly still on 2 wheels LOL.... I could not imagine doing that again...but was worth it to get it out of my curiosity..almost brought me back to my FMX days with the KTM450SX but at least it was built for it....
the KLX is good for a few mild jumps no more than 10' at max tho....
other than that she is a pig on fuel but to be expected with that kind of RPM...

A nice lttle ride all around with it..