First off your bike must be mechanically sound: brakes must work, kill switch must work, brakes must work, no loose spokes, no loose wheel bearings, steering bearings must be tight.
Fluid containment. You need catch cans in place to contain the carburetor vent and over flow lines, coolant overflow. The crank case breather line should either be run to the air box or into a catch can.
How to make a catch can (coming soon)
Safety Wire. Also related to fluid containment is safety wiring all bolts that if removed would allow fluids to be released. This includes oil drain/ fill bolts, water pump bolts, oil filter bolts. Also the front brake caliper mounting bolts need to be safety wired. Safety wiring is running small wire through bolt heads to keep them from coming loose.
How to safety wire bolts (coming soon)
Coolant. Antifreeze must be changed to straight water or a non glycol based coolant. Water wetter is a good additive to use with straight water. The reason for this is that if antifreeze is spilled on pavement it it extremely slippery and this is very dangerous.
Sliders. Sliders are used to protect the pavement track surface. Sliders are typically made out of hard plastic. Axle sliders extend out the end of the axles so that when the bike falls over the sliders contact the ground and not the metal fork legs.
How to make axle sliders (coming soon)
Footpeg sliders mount to the bottom of the foot pegs. This keeps the foot pegs from scraping the track in the event of a crash or when cornering with great lean angles. Handguards with a wrap around plastic aluminum bar that cover the end of the handlebar are recommended but not mandatory. Handguards should have plastic sliders on the ends of the metal bar also. If you dont have handguards the ends of your handlebars must be covered.