Here are the class structures USMGP Class Structures
Filed under:
Classes Featherweight
Juniors: ages 6-15 or Seniors: ages 16+
Bikes must be Cag - Blata 2.5 HP production* bikes with no engine modifications allowed except to clutch, air box and wheels or Chinese Manufacture Cagllari-Daytona style
pocketbikes with no modifications to any part of bike with the exception that any production air filter may be used. Blata 2.5 bikes may use a 14-14 SHA carburetor. Exhaust canister is preferred but not required. Non-programmable ignition systems must be used. No material may be removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
Production 4.2
Juniors: ages 6-15 or Seniors: ages 16+
Blata Elite 13 Jr. - Polini Powered 4.2
Modified Blata 2.5
Modified Cag
Bikes must have production* based Polini Series 1 engines OR Blata Elite 13 Jr. 4.2 and cannot have any engine or carburetor upgrades. Bikes may be air or water cooled 40 cc with 3 port head and can have up to 14-14 mm SHA carburetor. Stamped (seamed, stock) exhaust systems must be used and any production* dual reed conversion may be used.
Pocketbikes competing in this class may not have any clutch, flywheel or wheel upgrades. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed in this class on European powered
pocketbikes. Non-programmable ignition systems must be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated
Production 6.2
Juniors: ages 6-15 or Seniors: ages 16+
Blata Elite 14 6.2
Polini Powered 6.2, 7.5
Modified Blata Elite 13 Jr.
Modified Polini Powered 4.2
Pocketbikes must have production* based Polini Series 2 engines or Blata Elite 14. Bikes may be air or water cooled 40 cc with 3 port head and can have up to 14-14 mm SHA carburetor.
Pocketbikes competing in this class may have no flywheel, reed or wheel upgrades. Any production* designated exhaust may be used. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed in this class. Non-programmable ignition systems must be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated. ++ Classifications for 'modified' bikes in this class: Bikes must have production based Polini Series 1 OR Blata Elite 13 Jr. 4.2 engines and may be air or water cooled 40 cc with 3 port head and can have up to 14-14 mm SHA carburetor. Race/stuffed cranks and race** designed exhaust pipes may be used but no material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed. Non-programmable ignition systems must be used. Any production* clutch, flywheel, exhaust, reeds, air box, wheels and tires may be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
Super Production
Juniors: ages 6-15 or Seniors: ages 16+
Polini-style Powered 8.5 or higher
AMG Powered
Bizeta Super Production Powered
Blata Elite 14
Polini Powered 6.2
Bikes must have production* based Polini Stage 2 engines or Blata Elite 14 and cannot have any engine upgrades with the exception that race
/stuffed cranks and race designed exhaust pipes may be used. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed. Bikes may be air or water cooled 40 cc with 3 port head and can have up to 14-14 mm SHA carburetor. Non-programmable ignition systems must be used. Any production* clutch, flywheel, exhaust, reeds, air box, wheels and tires may be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
Sumo Super Production
(Seniors 16+ Only)
Polini-style Powered 8.5 or higher
AMG Powered
Bizeta Super Production Powered
Blata Elite 14
Polini Powered 6.2
Riders must be 185 LBS or higher to participate in this class.
This class will have a LeMans Style Start where the rider must run to his machine at the start of the race. Bikes must have production* based Polini Stage 2 engines or Blata Elite 14 and cannot have any engine upgrades with the exception that race
/stuffed cranks and race designed exhaust pipes may be used. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed. Bikes may be air or water cooled 40 cc with 3 port head and can have up to 14-14 mm SHA carburetor. Non-programmable ignition systems must be used. Any production* clutch, flywheel, exhaust, reeds, air box, wheels and tires may be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
Open
Juniors: ages 6-15 or Seniors: ages 16+
Polini, ZPF, BiZeta, AMG Powered
One-off product acceptable. Motors may be air or water cooled, up to 50cc 3, 4 , 5 OR 6 port heads. Bikes can have unlimited modifications to all parts of bike but must be naturally aspirated. No combustion enhancers such as NOS may be used. Any clutch, flywheel, carburetor, exhaust, reeds, and air box may be used.
New for 2007 we will allow 4 stroke
pocketbikes with motors up to 110cc . Bikes must follow all other class rules such as no NOS or combustion enhancers. Any clutch , flywheel, carburator ,exhaust, or air box may be used.
*) Production- defined as "stock configuration" and readily available
for sale to all consumers. 20 units must be initially available for a new product to be considered production. A production exhaust pipe may be modified to fit any model of pocketbike on the market but the basic specifications may not be altered. The best way to determine if your pipe is
classified as production or not is whether or not it has a seam in the side. Please call or e-mail the USMGP with any questions concerning this subject. Classification determinations ultimately rest with USMGP officials.
**) Race Designated- defined as upgraded performance parts. Even though some race designated parts may come from the dealer installed, they are still considered upgrades. Most common among these classifications are race exhaust and stuffed cranks.
+) All engines must be gas/oil burning. Use of ethanol etc. is not allowed.
Motard,YSR,NSR & Metrakit Classes
SuperBike 50 Juniors: ages 6-15 or Seniors: ages 16+
Stock YSR, NSR, Derbi, Aprilia, DT, NS, (Completely stock 50cc MetraKit OZ Bike with 12†Wheel OK). SuperBikes competing in this class may have no flywheel, reed or wheel upgrades. Any production* designated exhaust may be used. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed in this class. Non-programmable ignition systems must be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
SuperBike Open 50 Juniors: ages 6-15 or Seniors: ages 16+
Super Mod YSR/ Super 50 Mod. Bikes may be air or water cooled 50 cc Any production* clutch, flywheel, exhaust, reeds, air box, wheels and tires may be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated
SuperBike Extreme Juniors: ages 6-15 or Seniors: ages 16+
MetraKit OZ Bike up to 72cc, Derbi GPR50 up to 76cc, Aprilia RS50 up to 80cc, 4 strokes up to 200cc. One-off product acceptable. Motors may be air or water cooled. Bikes must be naturally aspirated. No combustion enhancers such as NOS may be used. Any clutch, flywheel, carburetor, exhaust, reeds, and air box, wheels and tires may be used.
Motard Stock 50 Juniors: ages 6-15 or Seniors: ages 16+
Motors up to 50cc. Motors may be air or water cooled. Cannot have any engine upgrades. Non-programmable ignition systems must be used. No material may be added or removed from any part of the exhaust, carburetor or engine and porting, polishing, matching, balancing etc. are not allowed. Any production*air box, Suspension, brakes, wheels and tires may be used
Motard SuperStock Juniors: ages 6-15 or Seniors: ages 16+
Bikes up to 107cc engines. No material may be added or removed from any part of the exhaust; carburetor or engine, and porting, polishing, matching, balancing etc. are not allowed. Bikes may be air or water cooled. Non-programmable ignition systems must be used. Any production* clutch, flywheel, exhaust, air box, Suspension, brakes, wheels and tires may be used. No combustion enhancers such as NOS may be used and all bikes must be naturally aspirated.
Motard Open Juniors: ages 6-15 or Seniors: ages 16+
Motors may be air or water cooled, up to 165cc. Bikes can have unlimited modifications to all parts of bike but must be naturally aspirated. No combustion enhancers such as NOS may be used. Any clutch, flywheel, carburetor, exhaust, air box, Suspension, brakes, wheels and tires may be used.
