Go to www.worcsracing.com in the rules you will see what you can change. Really it is just cosmetics. No engine mods and I would say no clutch mods either.
Mine:
2006 LTR450 Yellow, Black & Gray Powermadd Handguards, White Brothers Power Pro, Maxxis Razr2 Rears On ITP Baja Wheels, Maxxis Razr Fronts, JT 13t, Rath Racing Competition Nerfs Black, PRM Swingarm Gaurd, AMS Aerospeed paddles on ITP C-Series Black, Renthal Fat Bars Black, Spider Grips....
My Brothers:
2004 LTZ400 White ,DG Chrome Lite Nerfs, AC Racing Front Bumper, Acerbis White & Black Handguards, Curtis Sparks X-6, Sparks Supercharger and Filter, FCR 39mm, Maxxis Razr2's All Around, ITP Front GP Black Wheels, Sunstar 38t, Spider Grips
2007 Sponsors:
Four, Fasst Co., Hydro Dynamics/i-Shock