i was lookin into puttin some mods in my yfz and was wonder wut would be some good things, but i aint lookin for no really expensive parts

 

Try a new intake (K&N) with a new pipe and jetting ..... all in all should run no more than $600.00 tops!

the next thing you can do to pick up a horse or two is cutting out the air box.

Cam mod but only by a good mechanic, 15 tooth front sproket and a decent set it tires. now if you do all this and you still want more speed, well then you have to start messing with the engine/piston and the carb but that's major upgrades.