
Minimotonation.com

Official Pitbike Classes and Rules for 2023
Bike Classes - ( All classes may not apply to each event, check with the specific event you are attending)
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-Stock 110
-Stock Limited
-Stockmod
-FullMod
-40+
-Heavy weight
-Womens
-Xr100
-Playbike
-Unlimited
-Unlimited B
-Youth 9-14
-Youth 3-8
-Stacyc
-Vintage Mini
( All class rules listed Below)
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Class Rules -
**MiniMoto Nation reserves the right to alter these rules at anytime*
Stock 110 ​
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Comfort mods only( Bars, springs, tires, peg bars, shifters, levers, chains, tires, sprockets, or cosmetic upgrades)​
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No internal motor modifications
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Must have stock exhaust
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Must have stock airbox
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Must have stock swingarm( No aftermarket allowed)
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No aftermarket Throttle bodies (CRF) or Intakes
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No aftermarket clutches
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No additional aftermarket parts or modifications to the bike unless specifically approved in this rule section
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NO PORTING Allowed( NO porting of head/intake manifold or any other parts on the bike)
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No lightened flywheels or other components
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Must be air cooled 4 stroke
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110L not allowed. 110L rides in Stock Limited
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Stock Limited
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Aftermarket Exhaust allowed
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Aftermarket A style swingarms allowed( Foes/BBR ETC)
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throttle bodies/carburetors/intakes allowed
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Porting/jetting/tuning is allowed
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MUST RETAIN STOCK BORE/STROKE
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Conventional style forks required( no inverted forks allowed unless from factory(most chinese style bikes)
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KLX110L allowed
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Disc brakes allowed( This is the class you will race a stock YCF110 and other off brand bikes that are 110cc)
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aftermarket Clutches allowed
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114CC max ( no Big bores)
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Must be air cooled 4 stroke
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Stock Mod 110
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155cc Max Engine Size ( Any internal engine mods are OK as long as the bike meets the max engine CC requirement.)
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Aftermarket exhaust allowed
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Stock Style Suspension Required - Aftermarket A Style Swing Arms Permitted
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Stock Style Forks Required (KX 65 forks OK) - Inverted Forks are NOT Permitted
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Disc Brake Conversions Permitted
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KLX110L allowed
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Throttle bodies and Intake manifolds are permitted​
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Air cooled motors 4 strokes only
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clutches allowed
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Fullmod
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No Modification Restrictions
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Wheels limited to 12” rear and 14” Front
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Air cooled motors 4 strokes only
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Electric conversions allowed.
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No surrons
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PlayBike -
Bikes are limited to XR100, KLX140, KLX140L, CRF125, CRF150F, DRZ125, and TTR125.
Bikes Must be Air Cooled 4 strokes
190cc Max Engine Size
No Modification Limits Otherwise
40+
-No Modification Restrictions
-Must be air cooled 4 strokes
- Wheels limited to 17” rear and 19” Front.
-Rider must be of 40 years of age or older
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Heavyweight
-Must be 220+ lbs for this class
-No modification restrictions
-Must be air cooled 4 strokes
-Wheels limited to 17" rear and 19" front
Womens
-190cc Max
-17/19 Max wheel size
- Must be air cooled and must be 4 stroke
XR100
-145cc Max
-Must be Honda XR100 Frame
-XR80s allowed
Unlimited
-17" Rear and 19" front max
-No cc Limit
-Must be air cooled
-Electric Conversions/bikes allowed, as long as all other requirements met.
-Air cooled 2 strokes allowed
- Surrons allowed
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Unlimited B​
-Same rules as unlimited
-You cannot ride this class if signed up for any money class
-This class is designed to be an entry level class for people new to the sport/racing scene.
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Youth 9-14
-Must 9-14 years old
-12" rear and 14" front max NO BIG WHEEL BIKES/PLAYBIKES
-Must be air cooled and 4 stroke
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Youth 3-8
-Must be 3-8 years old
-4 stroke ONLY (pw50s allowed)
-110cc MAX
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Vintage Mini
-110cc max engine size( 4 strokes 1999 and older)
-80cc max engine size(2 strokes 1975 and older except for GT80,KV75 and similar bikes)
-14" max rear wheel size
-Typical minis but not limited, to this class: z50,CT70,SL/XL70,KV75,XR75,GT80,YZ80(74-75),JT1,JT2, TM75(74-75) AND similar era Minis.
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Stacyc
- Must be an electric style balance bike
-16" max wheel size