Oh I forgot to add, the top speed for me is 60-65 indicated. According to the GPS, the bike's speedometer is off by 4.5 mph.

 

Cool, thanks for the info

If I switch the rear sprocket to 45, do I need to change the chain also? and since funds are minimal right now and I can't afford a pipe and jetting, I was thinking of just changing to the 13t up front, would it be benificial to change the rear to a 45 also? Only mod on the bike is from PO and it's the snorkel has been removed, but the actual lid is still on it.

 

13/45 will require a new chain with 108 links (stock is 106 links.) Stick to the 13 tooth front for now if $$ is tight. the 13 tooth works with the stock 106 link chain.

 

I think it depends on how much you weigh. I did the opposite of most folks. I bought my bike ('07) from someone who had changed to a 13 tooth front. I rode it for over a year and then I just changed to the 14 tooth last week just to see if I liked it. I absolutely love it on the road. I weigh 160 lbs and I fly on this thing, it feels like a completely different bike and 4th gear seems to pull like crazy.

New tires (thanks for the advice on the other thread) and new gearing makes me feel like I have a new mistress.

 

Yeah since the KLX don't have enough HP to pull redline in 6th gear, you aren't losing any top end with the 13T. Definitely a great mod with no real downside.