whats the best pipe and add-on's to put on a stock yfz to make it faster all info will be taking thanks guys

dasa, monster, nmotion all good pipes. FCI intake, port head, bore carb, cams, piston, ect. lots of stuff to do, just depends what type of riding you do and how deep your pockets are.

..And a Dynatek programable ignition..

thanks for the info. i dont want the bike to be all out drag but i want it to be fast for a stock looking bike. i have a drag banshee to race on but just want my 450 to be faster without going all out drag on it

shave the weight, kick starter modification, race ported head and what everyone else said. I'd look at MMAD for the porting but that is jmo....

i have heard of doing a cam mod to the stock exhaust cam. is this worth doing and will i feel a difference. im do a port job on the head and put a better pipe on it. i have a gytr exhaust system on it now

Yes,Do the cam mod..You will feel a slight increase,but it will be more mid to upper rpm range..Its free and worth doing.

DO I NEED TO ORDER A NEW TOP END GASKET OR WILL I BE ABLE TO DO CAM MOD AND SAVE GASKET

you don't need any gaskets. The valve cover has a rubber o-ring type gasket that can be reused, and there's no need to pull the head or anything else to do the cam-mod