Check this guy out for a-arms, steering stem and shocks.
http://www.jdperformance.net/488%20Web%20Design/yamaha.html
I did a whole package on my 02.
Fireball +2+1 Steering Stem w/1-1/8" bar clamp
ProTaper Contour CR Mid bend bars w/ODI Rouge Grips
Man what a huge difference, confidence went thru the roof!!
Fireball LT a-arms with LT Elka Stage 5's.
Fireball HD +2 swqingarm
House of Horsepower rear shock resprung and revalved for the +2 and my riding weight.
I kinda wished I had looked into jd performance before I bought all my fireball shit.
My front-end understeers like a mutha fucka, but I attribute that to too much negative toe.
I'm getting ready to reinstall everything and I'm using a tool to dial in caster angles and camber angles.
And, while you're buying your control arms, ask them to make you tie rods that use 2006 and newer Raptor 700 tie rod ends.
They're 12mm threads rather than the puny 10mm stock banshee shit.
That jd performance guy talks about it on his site.
I especially like how you can dial in his caster adjustments simply by moving the shims.
Suspension makes a huge difference.
Steering stem and bars make a huge difference.
Spread your money out on a whole package.
Do I need the stage 5's hell no, but I had the scratch and I got them for $500 off msrp.