4 Horsemen Racing Glossary Of Terms:

MRA		Motorcycle Roadracing Association
		Colorado's club-level racing organization - find out more at MRA-Racing.org
		The MRA is sanctioned by the AMA (American Motorcycle Association)
Novice		Newer racer
		Identifiable by black numbers on a yellow background
		Can only race in a limited number of classes (Novice & Amateur, Sportsman & Endurance)
Expert		Experienced racer
		Identifiable by black numbers on a white background
		Can race in any class that their bike qualifies for, except Novice classes - for complete details, please refer to the MRA rulebook
Race Types	Sprint Race
		A relatively short race, consisting of 7-10 laps (depending on track length), usually taking 10-15 minutes to complete
		Most races in the MRA are Sprint races, with the exception of Heat races, Endurance races, & Race of the Rockies
	Heat Race
		Only run when there are too many racers signed up for a specific class
		A short 3 lap race - the top finishers qualify to compete in the class they signed up for
		Racers that do not qualify are allowed to compete in the Sportsman class
		If required, heat races are the first races of the day
	Endurance Race
		A 30-minute timed race ridden by 1 rider.
		These races are broken down into 4 different categories based on engine size:
		Lightweight - small 4-cylinder and small-to-mid sized 2 cylinder 1 Middleweight - Engine displacement up to 640 cc for a 4-cylinder (or up to 750 cc for a 2-cylinder) 1 Heavyweight - Engine displacement up to 750 cc for a 4-cylinder (or up to 1000 cc for a 2-cylinder) 1 Open - Engine displacement is not limited
		Endurance races take place on Saturday afternoon.
	Race of the Rockies
		The MRA's premiere class, running twice as many laps as a Sprint race.
		aka "ROR"
		Split into 2 categories based on engine size:
		GTU - Engine displacement up to 640 cc for a 4-cylinder (or up to 750 cc for a 2-cylinder) 1 GTO - Engine displacement must be larger than those eligible for ROR GTU
		Winner of ROR GTO championship is considered the #1 plate holder for the following season.
	Sportsman class
		This class is intended to be an essentially non-competetive environment where racers can hone their skills until they are ready to move up to other classes.
		This class is open to both Expert & Novice racers.
		Brand new Novices are usually seen running this race.
		It is not typically run by experts unless they are coming back from an injury or they failed to qualify (heat race) for another class.
		There are no engine displacement limitations.
Classes	Race classes are typically broken down by one of more combinations of:
	Engine Size/Configuration Classifications:
		Lightweight - small 4-cylinder and small-to-mid sized 2 cylinder 1 Middleweight - Engine displacement up to 600 cc for a 4-cylinder (or up to 750 cc for a 2-cylinder) 1 Heavyweight - Engine displacement up to 750 cc for a 4-cylinder (or up to 1000 cc for a 2-cylinder) 1 Open - Engine displacement is not limited Super Twins - 2 cylinder motorcycles only
	Allowable Modifications Classifications:
		Supersport - The engine must be mostly stock, with only a limited number of modifications allowed to the bike. 1 Superbike - The bike can be modified with very few limitations. When combined with Middleweight (eg: "Middleweight Superbike"), allowable engine displacement is increased to 640 cc. 1 GTU - Essentially a combination of Middleweight ("U" stands for "Under", as in under 650 cc for a 4-cylinder) and Superbike. 1 GTO - Essentially a combination of Open and Superbike. 1
	Race Types:
		Sprint - As described above Endurance - As described above Race of the Rockies - As described above
	Level of Racer Classifications:
		Novice - As described above Expert - As described above Amateur - combination of both Novice & Expert racers.
	Classes that 4 Horsemen Racing are competing in for 2006:
		Saturday Middleweight Endurance Heavyweight Endurance Sunday Amateur GTU Amateur GTO Middleweight Supersport Middleweight Superbike SuperTwins GTU SuperTwins GTO Heavyweight Superbike Race of the Rockies GTU
1 These are just basic guidelines - detailed information is available in the MRA rulebook