Explanation of the Classes

The following is a brief explanation of what each class we run at Oswego is. We may run more classes than are covered here, but we will try to keep this as up-to-date as possible.

Oswego Name	Junior Purple
Alternate Names	Briggs Junior Sportsman I (WKA) Junior Sportsman

Ages	Min. Weight	Engine	Carb
8-12	245lbs.	Briggs	Purple Plate
This class runs a stock Briggs motor with a purple-colored restrictor plate of standard size in the carb. If you hear the name "Junior Sportsman" alone it probably means this class, and not Junior Blue. The purple restrictor plate is the smallest that is placed on Briggs engines, making it the slowest class we run at Oswego. For this reason the purple class is recommended for youngsters new to karting.

Oswego Name	Junior Blue
Alternate Names	Briggs Junior Sportsman II (WKA) Junior Sportsman Blue

Ages	Min. Weight	Engine	Carb
8-12	300lbs.	Briggs	Blue Plate
This class runs a stock Briggs motor with a blue-colored restrictor plate of standard size in the carb. The blue restrictor plate is slightly larger than the purple plate, making this class a good choice for more experienced junior karters who want to experience higher speeds, but are still in the lowest age bracket.

Oswego Name	Junior Gold
Alternate Names	Briggs Restricted Junior (WKA) Junior Restricted

Ages	Min. Weight	Engine	Carb
12-15	300lbs.	Briggs	Gold Plate
Junior Restricted runs the gold-colored restrictor plate. The gold plate is the largest restrictor plate placed on Briggs motors, allowing our older junior karters to have a little more power to play around with.

Oswego Name	Junior Unrestricted
Alternate Names	Briggs Junior (WKA)

Ages	Min. Weight	Engine	Carb
12-15	300lbs.	Briggs	Stock
Junior Unrestricted runs no form of restriction, which combined with the light weight of the driver usually results in speeds similar to or greater than that of the senior Briggs classes. Recommended only for experienced junior karters expecting to transition to a senior Briggs class.

Oswego Name	Junior Yamaha
Alternate Names	Junior 2-Cycle Junior 3-Hole Can

Ages	Min. Weight	Engine	Exhaust
12-15	300lbs.	Yamaha KT100	3-Hole Can
The Junior version of the Senior Sportsman class (yes we know this is confusing, as the Junior Sportsman class is Briggs, blame WKA). This class is technically identical to the Senior Sportsman karts, it differs only in the minimum weight, making it an ideal class for juniors looking to transition either to Senior Sportsman or Yamaha Pipe. Speeds are similar to the Junior Unrestricted class.

Oswego Name	Stock Light
Alternate Names	Briggs Light (WKA)

Ages	Min. Weight	Engine	Carb
15+	325lbs.	Briggs	Stock
The "lightest" of the senior Briggs classes. These are relatively unmodified Briggs motors run without any form of restriction with standard carb and muffler. The Stock Light/Medium/Heavy/Super-Heavy classes are all the same in every respect except the minimum weights required.

Oswego Name	Stock Medium
Alternate Names	Briggs Medium (WKA)

Ages	Min. Weight	Engine	Carb
15+	---	Briggs	Stock
The medium-weight version of the senior Briggs class.

Oswego Name	Stock Heavy
Alternate Names	Briggs Heavy (WKA)

Ages	Min. Weight	Engine	Carb
15+	365lbs.	Briggs	Stock
The heavy-weight version of the senior Briggs class.

Oswego Name	Stock Super-Heavy
Alternate Names	Briggs Super-Heavy (WKA) Briggs Super-Heavy Driver

Ages	Min. Weight	Engine	Carb
15+	400lbs. (Driver: 200lbs.)	Briggs	Stock
The super-heavy-weight version of the senior briggs class. In addition the driver must weigh at least 200lbs. The driver restriction is to prevent light guys adding lots of weight, which at some point is an advantage because added weight can be positioned anywhere in the kart.

Oswego Name	Senior Sportsman
Alternate Names	Yamaha Can Senior Can

Ages	Min. Weight	Engine	Exhaust
15+	360lbs.	Yamaha KT100	3-Hole Can
This is the senior version of the afformentioned Junior Yamaha class. At Oswego we strictly run the 3-hole can exhaust restrictor in the Senior Sportsman class. Note that this is directly contrary to the official WKA rules, which no longer allow the 3-hole can, and instead utilize a 4-hole version. It should be noted that the 3-hole can was run for so many years before WKA moved to a new design that there are still vast quantities of these cans around in private possesion. If the supply of them ever dries up or community attitudes shift we may move to a 4-hole can at some point.

Oswego Name	Yamaha Pipe
Alternate Names	Yamaha Heavy

Ages	Min. Weight	Engine	Exhaust
15+	360lbs.	Yamaha KT100	Pipe
This class uses exactly the same engine (The Yamaha KT100) as Senior Sportsman, only a pipe of standard design is used for exhaust restriction. The pipe is a much much more efficient design and so this class achieves much higher speeds than the can class does.

Oswego Name	100cc Controlled
Alternate Names	Controlled

Ages	Min. Weight	Engine	Exhaust
15+	325-365lbs.	Variable	Variable
This class actually allows several different types of engine to be used, which are balanced by different minimum weights. We will try to obtain a more detailed description of the different engine types at some point. The following setups are allowed: Yamaha - 325lbs. Piston-Port - 340lbs. Rotary-Reed - 355lbs. New Rotary-Reed - 365lbs.

Oswego Name	TAG (Touch-and-Go)
Alternate Names	Rotax*

Ages	Min. Weight	Engine	Exhaust
15+	Variable	Variable	Variable
This is another grouping of several different engines into one class. A description of the regulations for TAG can be found over at the TAG USA website. Since the only type of engine yet used at Oswego is the Rotax Max engine, this class is also commonly referred to as Rotax. Minimum weight for the Rotax motor is 325lbs.