The best thing you can do is invet in a service manual for your bike. They are the best investment you can get for your quad. It will explicitly show you how to do this with pictures to guide your way!
400EX- Renthal Bars,MotionPro Twist Throttle,Pro Design Kill Switch,AC Mudscreen Frt Bmpr,AC Fullbody Skid,AC Swingarm Skid,AC Pro-Peg Nerf Bars,Steel braided brake lines,Denton steering stabilizer,Raptor EZ-Pull Cluth Lever,Maier Universal XC Handguards,White bros. E-series Pro-Meg Exhaust,K&N Air Filter w/outerwear,Works Shocks w/Shockwears,Wiseco 440 kit, Hotcam,Eichner series Edlbrock carb,Hinson clutch and basket,6 degree timing key,FST oilcooler,Oversized oil tank