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Welcome to UMRA!
United Mini Racing Association
Welcome to the official UMRA racing website, a Southern California based mini-motorcycle road racing league. United Mini Racing Association was established simply to make racing fun and affordable to everyone. We charge people the bare minimum possible to race in this league, none of the staff take home a dime so that everyone that wants to race like Rossi can do so as often as possible.
#minigp #minimoto #roadracing #raceumra
The 2022 UMRA 24 Hour Endurance Race is on! Registration is open. Register now!
Rules & Classes
UMRA was built around the popular classes of converted dirt bikes, small displacement street bikes, and older GP chassis bikes. As new bikes emerge we will continue to adapt our rules with certain Specs for specific bikes to keep competition fair for sprint and endurance races.
Modern Mini GP bikes
Modern mini GP bikes such as the Ohvale and Bucci will be required to remain STOCK in their USD spec form and will be put into specific classes outside of their spec class. Any mods or engines not considered 2020 USD spec will move them up at least one class.
85/150 Stock Endurance
GP or Motard frames, max displacement of 85cc (2 Stroke), 150cc (water cooled 4 Stroke) and 230cc (air cooled 4 stroke).
Pocket Bikes
We do not run pocket bikes of any sort.
Unclassified Bikes
Any bike not listed will be allowed in a class on a trial basis but may be moved and points forfeited.
Combined Races
If 3 or more do not show up you may be combined with another class at race director's discretion.
2022 Endurance Race Classes
Stock Moto or Spec 50 GP bikes and rules
ONLY the following bikes are allowed in their STOCK unaltered form (including foot peg location) unless noted. May change bars, fork oil, springs, gearing.
CRF100 - 16" front wheel allowed.
TTR125, KLX125, DRZ 125 - 16/19" big wheel versions only
Grom/Z125 - Bone stock. May tape or remove lights and other street requirements.
KLX/DRZ 110 - May run 12" wheels.
Stock NSR50.
Stock Kymco 125.
Bikes intended: 100-125 Aircooled converted dirtbikes, GROMS/Z125, modified NSR50, NSF100
Max displacement of 63.9cc (2 stroke) & 128cc (air cooled 4 stroke). Engine mods are allowed.
* Ohvale/Bucci 110 Allowed in stock/unaltered form
GP or Motard frames, max displacement of 65cc (2 stroke) & 158cc (air cooled 4 stroke)
* Ohvale/Bucci 160 allowed in stock/unaltered form
GP or Motard frames, max displacement of 85cc (2 stroke), 150cc (water cooled 4 stroke) and 230cc (air cooled 4 stroke)
2020/21 Sprint Race Classes
This class is intended to introduce new riders into racing and help them develop track etiquette and race technique before they graduate into championship classes. Riders are allowed to remain in the class for up to a half season but do not compete for championship points. Race director has the ability to move riders out of this class at any time if he/she feels that there is an unfair advantage. Bikes allowed: Any motorcycle, GP or Motard frame, max displacement of 65cc (2 Stroke), or 150cc (air cooled 4 stroke).
Bikes allowed: Stock CRF50 and TTR50 only.
5-10 year olds only.
No engine mods or knobby tires allowed. Springs and controls may be changed only.
Bikes allowed: Modified CRF50 and TTR50 only.
5-10 year olds only.
Up to 88cc engine displacement allowed. Manual clutch kit allowed. NOT PERMITTED FOR THIS CLASS: Stroker cranks. Any displacement over 88cc. 4-5-6 speed transmission (must be kept to 3 speed transmission). Stock frame, stock fork tubes, stock wheel size, stock swingarm must be retained.
Bikes allowed:
Honda NSR50 - everything must remain stock
Yamaha YSR50 - aftermarket carbs & exhaust are allowed.
Suspension springs may be replaced but the internals must remain stock. Controls such as pegs, rear sets, throttle tubes, ect. May also be changed. Bodywork and gearing may also be changed.
Bikes intended: 100-125 Aircooled converted dirtbikes, GROMS/Z125, modified NSR50, NSF100
Max displacement of 63.9cc (2 Stroke) & 128cc (air cooled 4 Stroke). Engine mods are allowed. May run combined, split wave, or seperate.
* Ohvale/Bucci 110 allowed in stock form
Bikes intended: 65 air cooled 2 strokes, air cooled converted dirtbikes up to 156cc
GP or Motard frames, max displacement of 65cc (2 Stroke) & 156cc (air cooled 4 Stroke)
Bikes intended: 65 air cooled 2 strokes, air cooled converted dirtbikes up to 156cc
GP or Motard frames, max displacement of 65cc (2 Stroke) & 156cc (air cooled 4 Stroke)
Must be at least 30 years old by December 31st of this race year.
(Runs at the same time as Supermini Vet 30)
Bike allowed: Any STREET LEGAL Four Stroke 125.
Max displacement 128cc. Grom, Z125 Pro, etc. Bike must have come street legal from the factory to be eligible. Stock bore/stroke, head, cylinder, valvesm, fork tubes, swingarm, frame, master cylinder, calipers, and rotors. No forced induction allowed. ECU, cam, exhaust, shock, and fork internals may be changed.
Bikes allowed: GP & Motard frame, max displacement of 112cc (2 Stroke) & up to 150cc (4 Stroke).
Unlimited engine mods allowed.
* Ohvale/Bucci 160 allowed in stock form
Bikes allowed: GP & Motard frame, max displacement of 112cc (2 Stroke) & up to 150cc (4 Stroke).
Unlimited engine mods allowed.
Must be at least 30 years old by December 31st of this race year.
(Runs at the same time as 65GP Vet 30)
Bikes allowed: Street/GP/Dirt, displacement of 125-250cc (2 Stroke) & 150cc-450cc (4 Stroke).
Unlimited engine mods allowed.
* Ohvale/Bucci 190 allowed in stock form
All bikes must be STOCK USD Spec for that bike. Ohvale or Bucci only. NO engine swaps, mods, etc. Please ask if you are unsure about your engine. Only jetting, gearing, and adjustments to stock spec suspension allowed.
110 and 160 will run together in separate waves.
Three (3) or more 190s show and we will make room for them in the schedule.
ONLY the following bikes are allowed in their STOCK unaltered form (including foot peg location) unless noted. No slicks. May change bars, fork oil, springs, gearing.
CRF100 - 16” front wheel allowed.
TTR125, KLX125, DRZ 125 - 16/19” big wheel versions only
Grom/Z125 - Bone stock. May tape or remove lights and other street requirements.
KLX/DRZ 110 - May run 12” wheels.