Vet261
PR Addict
Sorry, I misunderstood and thought you were talking about the Pro Nationals -- those are the AMA PRO Racing rules. They do not apply to Deegan's motor at LL.Yep those are the rules! Tells me nothing, other than the fact that maybe 1 or more of those rules where overlooked when building deegans motor.
These are the AMA Amateur "mod" class rules regarding the engine:
1. Engines (Modified Classes)
a. Motorcycles must use the crankcases of the production motorcycle engine. The use of sleeving, stroking or boring to change displacement classes is allowed.
b. Any crankshaft configuration may be used (180- degree firing, alternate firing, etc.).
c. Naturally aspirated engines only.
d. Removal or alteration of displacement or bore size designations on cylinders or cases is prohibited.
e. The displacement of the motorcycle or minicycle may not exceed the class limit. Piston displacement specifications depend on the type of meet.
f. Piston displacement may be measured using either of the following formulas: (1) V = 3.1416 * b2 h; b is one-half bore, h is measured stroke MOTOCROSS 1.2 22 V = 3.1416 x (one-half bore x one-half bore) x measured stroke x number of cylinders (2) V = B2 * 0.7854 * h; B is bore, h is measured stroke V = bore x bore x 0.7854 x measured stroke x number of cylinders Note: If bore and stroke is in millimeters, divide the end product by 1,000 to convert to cubic centimeters (cc). If bore and stroke is in inches, multiply the end product by 16.387 to convert to cubic centimeters (cc).
2. All combustion engine motorcycles must use petroleum based gasoline as defined by the American Society for Testing and Materials (ASTM), designation: D4814. All gas must be stored in approved containers
The only LL Supplemental rule that applies to "mod" classes is regarding using next year bikes:
1. Next year model machines are not eligible in any class at the AMA Amateur National Motocross Championships.
Yes. Just a few years ago about 7 PW50s were protested and torn down at the end of the week. I think 4 of them ended up with DQ.Has any motor ever been torn down at Loretta's ?
Ironically, the original protester who protested the entire top 5, was also protested and his bike found illegal!
I think at this point I've about exceeded my energy in reading and quoting rule books. hahaha
For further info, links below:
2022 AMA Amateur rulebook
2022 LL Supplemental Rules:
2022 AMA Pro Racing Rulebook:
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