1. All motorcycles must be effectively muffled so that the noise level is not irritating to the other riders, workers, or spectators.

2. The intermediate, advanced, expert, and Champ classes may only use tires that are of a trial tread pattern that meet International Motorcycle Federation specifications and which are available to the general public.

3. A rider may start and finish on different bikes.

4. Vintage Technical Specs

NOTE: Without machine limits, modifications may cause the difficulty level of the sections to increase beyond “fun” for many riders as well as greatly increasing the cost of competing.

a). Tires and Wheels: Trials tires are required in all classes. Any pre ‘80 wheels and hubs from the proper era are acceptable.

b). Suspension: No single-shock bikes may compete (except Vincent).

c). Rear dampers may be replaced with gas filled units. Rear wheel travel (not shock travel) is limited to four inches. Front wheel travel is limited to seven inches.

d). Silencers are required. No machine may compete with an open exhaust system.

e). Major components may not be later than 1980. Specifically: engine, frame, gearbox, and forks.

f). All modifications must be consistent with the spirit of the class. Period modifications only.

5. IMPORTANT! Anyone operating a motorcycle at any COTA event is required to wear a DOT or Snell 85 or later, or any FIM approved helmet or they may be removed from the property. It is the sole responsibility of the rider to select a helmet and apparel, which will provide appropriate protection. The rider must rely upon his own judgment in the selection of any helmet and apparel for durability and safety.

6. A number plate is encouraged stating class and name.