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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
AMA rule Changes, its that time of year!
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[QUOTE="James980, post: 28466, member: 16990"] As we've said, the dual class eligibility of the +251cc four-strokes is a result of the relatively low power 4S bikes output vs. two-strokes. Basically, in the past a 250cc 4S just wasn't competitive with a 250cc 2S, so you obviously had to allow the bigger bore 4S bikes compete with the smaller 2S bikes. Throw in the weight disadvantage of the 4S bikes, and it seems logical to allow 4S bikes up to 550cc compete with 250cc 2S bikes. This creates a special situation for the bigger 4S bikes. Because Class 3 is defined as only 251cc-Open with no 2S or 4S clarification, legally you could run any 4S 251cc or larger in that class. Now, as with most things, technology is out-pacing the rule books. Obviously, big 4S bikes are competitive with even 500cc 2S bikes. If you doubt that statement, just check out any top five in the Open classes on Wardy's results page. It's Yam...Yam...Yam... (with apologies to AJ). My guess is the statement in the AMA rule book "No motorcycle may be entered by the same rider in more than one engine displacement class of the following classes 1,2 or 3" was put in there to foil guys from switching, say, a stock 125cc cylinder with one bored 0.80 over and running the 250cc class with the same bike otherwise. I also guess that the original Class 3 designation that doesn't specify 4S or 2S was done because the original authors simply didn't know what to do about the 4S limits because they already went up to 550cc on Class 2 (out of necessity because 4S used to be at much larger disadvantage to 2S bikes of the same size). What would they have done? Made Class 3 251cc-Open 2S and 551cc-1000cc 4S or something? That would have looked pretty stupid. The AMA rulemakers need to bite the bullet and fix this. It seems pretty silly that on one weekend a bike can be raced in one class and then with *no modification* be raced in another class on the next weekend, but the same bike can't be raced in those same classes on one day. Either the line that says one machine can't be entered in more than one class on one day needs to be clarified to limit it to its original intent OR the class displacement limits for 4S bikes need to be set for each class. For example: Class 1: 86cc-125cc 2S, 86cc-225 4S Class 2: 126cc-250cc 2S, 226cc-350cc 4S Class 3: 251cc-Open 2S, 351cc-Open 4S James 00CR250 [/QUOTE]
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MX, SX & Off-Road Discussions
General Moto | Off-Topic Posts
AMA rule Changes, its that time of year!
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