Here's my mod list for my MX banshee...pulled off my site; probably left a few out, but owell. I'm not done yet...but how can you be? And of course, not all of my mods are needed for MX, just picked up along the way.
1997 Yamaha Banshee, full custom gussetted frame
Ported & Polished - mild
Milled Head
Dyno Jet Kit
Hinson Clutch Baskett
Barnett Dirt Digger Clutch
Chrome Pro-Circuit Platinum Pipes & Silencers
+2+1 LoneStar Chrome A-arms
Works Triple Rate Shocks w/Rezzies
-2 Burgard Swingarm w/round house Honda style twin row bearing carrier
Ohlins Rear Shock
+2+2 Durable Eliminator axle w/Honda hubs
Graydon Proline Nerf bars
Toomey 2:1 w/UNI filter & Outerwear
White Bro's Boost Bottle & Break Block-Off
Fly Racing Handlebars w/pro-grips
MSR Raptor Clutch Perch & Lever
TM Design Works Chain Slider
AC-Racing swingarm skid
Outerwear's Shockwears - front & back
Cascade polished grill & 'eye' light covers
Polished gas cap, footpegs, & brake