UAS Kid Kart Rules
stated otherwise in what follows, all other previously stated
specifications, rules and policies in the UAS will also apply to the
UAS Kids Kart.
2. For the 2017 and 2018 season, UAS Kid Kart engine, safety and body
specifications will be monitored and adjusted as needed to maximize
safety and maintain a balance in the competition. This policy exists
because of how new this class is and will make development easier.
After that time the same policies regarding UAS rule changes will go
1. UAS Kid Kart drivers must have a Minor Release, signed by both parents on file.
2. The UAS Kid Kart class is for drivers 5 to 8 years old.
1. Comer C-50 (cast aluminum blower housing) and Comer C-51 (plastic blower housing).
Other engines will be examined for inclusion in the UAS Kids Kart as
they are presented to the UAS national office for testing.
3. Engines are to be run in stock appearing condition.
A. This means that externally the engine must look as it does when it
comes from the factory with the exception of the air filter and exhaust.
B. The muffler hole sizes are non-tech (we have learned that bigger or
more muffler holes do not increase performance but they do make more
noise). After market tuned exhaust pipes are permitted but with a
higher minimum kart and driver weight.
C. The air filter is non-tech, meaning that the competitor may use any air
filter that fits provided that the filter does not incorporate some
sort of external scoop or ram effect that is visible when the filter is
D. Any drive sprocket ratio may be used. Clutch and axle sprockets are non-tech items.
E. The fuel line from the tank to the carburetor is non-tech and an external fuel filter is permissible.
F. Internally the engine may be altered as the competitor sees fit with the exception of the stroke.
Use of Restrictors
On tracks designated as 1/5 mile or longer, engines must use a
restrictor to limit top speed. No restrictor is required on tracks less
than 1/5 mile.
1. Comer C-50 or 51 engines, restrictor maximum inside diameter is .276" (7.01mm).
2. Other engines (to be determined as other engines are submitted for testing).
Engine Stroke Tech
stroke of the Comer C-50/51 engines is not to exceed 1.506" and it is
to be measured with a dial indicator and a suitable adapter that
attaches to the spark plug hole. (This is very easy to do without
disassembling the engine but eliminates the very expensive stroker
crankshafts...we don't worry about the bore size in that no suitable
oversize pistons are available anywhere and it is very impractical to
resize a cylinder with an intregal head)
Specifications for other engines will be included after they are submitted for testing and approval.
1. Comer C-50 or C-51 with a factory muffler.....150 lbs.
2. Comer C-50 or C-51 with an aftermarket muffler or tuned exhaust.....160 lbs.
3. Other Engines.....to be determined as they are submitted for testing.
Tires and Wheels
1. The largest permissable diameter tire size as marked on the tire is 11".
2. 5" or 6" diameter rims are permissible. Maximum rim width is 6".
rear bumper must extend at least half way across the tread of your rear
tires. This can be done with a full coverage bumper or a devise such as
a "hopper stopper".
Driver Safety Equipment
1. UAS Kid Kart drivers must wear an approved chest protection devise.
Kid karts are to be equipped with a teather type engine kill switch
that will shut off the engine if the driver is separated from the kart.
3. Other driver safety gear is to meet the same specifications as the UAS.
UAS Kid Kart Committee
Matters concerning UAS Kid Karts are to be brought to the attention of
the UAS Kid Kart Chairman. The Chairman will appoint other
committee members as they are needed.
2. For 2017, the UAS Kid Kart Committee Chairman is Mark Bergfelt.