DTX vs Modified Bike

DTX vs Modified Bike

Postby Shelstad on Mon May 11, 2009 9:39 am

With the AMA Holeshot Series Races coming to the short track at the end of May I have been asked by several racers what is the difference between a DTX bike and a Modifed bike. Basically the difference is changes that are made to a bike from OEM configuration that give a competetive advantage. With the exception of changing tires and wheels and suspension componants. DTX bikes must remain in oem configuration as far as the motor is concerned except for Reed valves, exhaust. The questions that have been asked are steering stabilizers and or handel bar replacement, does that mean that bike has to be ridden in the mod class. The answer is no. Those items may be added to a dtx bike. Modified would mean that you have modifed a motor coponant such as air box, carberator, head, cam, ect. You may not run a quick change rear wheel on a DTX bike but you may on a Mod bike. If you ride a Framer bike it may only be ridden in the Mod class. You may ride your DTX bike in both the DTX and the mod class.
Shelstad
 
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Re: DTX vs Modified Bike

Postby gkinzler on Mon May 11, 2009 10:09 pm

When we were at nationals last year we learned that the DTX bike must be stock appearing too,even down to the front fender!There is an after market case cover on the bike that recieved alot of attention.If Michael would have landed on the podium he could have been protested for his supermoto front fender and the case cover.We found a stock air box to use so that was not an issue anymore.Crazy,but I guess you have to have guide lines that everybody must follow.Gary/Lightshoe
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Re: DTX vs Modified Bike

Postby Shelstad on Tue May 12, 2009 9:50 am

The front fender issue boils down to this. The rule says you have to have an OEM fender or no fender. Last year after nationals the rule was changed to allow a replacement fender. It doesnt say OEM or otherwise specify. At the officials meeting this winter we were told to use our judgement as to if a competetive advantage was gained or not. As far as the replacement clutch case cover the rules allow for an after market case cover its what is behind the case cover that matters. If it is anything other than a direct OEM replacement meaning stock configureation then it is deamed modified. The airbox issue is exactly what it says. If it is not stock or OEM configuration then it is modified. This means no holes, no slots, no K&N.
Shelstad
 
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