How to make my 06 yfz 450 faster

[yamaha48]

What i have is a 06 yfz 450 i have 13.5.1 cp piston,hot cams,head work,air box setup,hot rod crank,and the quick shot in the carb. I have some money stuck into it but dont want to stick alot more money into it. What can i do to gain more power with out spending a bunch of money Please give me some ideas thanks

[aDviSol2y]

Where do you want power gain? Bottom end, top end, all range?

[yamaha48]

I have enough bottom end but need more top end what do you think.

[yfzrider690]

Get a fci intake setup, they make more power through out the whole range.

[aDviSol2y]

If you want more top speed you could change your gearing. Go bigger in the front or smaller in the back.