max engine size for competition [Archive]

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08-09-2002, 04:07 PM

i have a trx 250r and was wondering what the max sizes were in the ama sanctioned races, or atva, whatever it is. i know they let the 4-strokes run a 440 but is the limit 250cc for the 2-strokes or can ya go a little bigger like a 265 or 310? thanx

kabd69667

08-09-2002, 04:22 PM

I'm sure you can go 265 cuz most of the guys are runnin 265 powervalve's. In the 250 pro-am you can run up to 440cc

08-09-2002, 04:24 PM

but that 440 is for a 4-stroke not a 2-stroke. if they allow a 265 do they allow a 310 or 330?

Dave400ex

08-09-2002, 04:48 PM

The limit for 2 Stroke is 265 unless in a Open Class.

08-09-2002, 04:50 PM

thanx man i am in the process of lining up my new powervalve but did not want to go out of the class.

Dave400ex

08-09-2002, 04:53 PM

What kind of Powervalve did you get? We found out with my Brother`s 250r Motor when you give it a lot more Power the Gears and all that stuff has to be replaced because his Gears shot and screwed up the whole Tranny and other stuff in the Bottom End.

08-09-2002, 04:54 PM

i have not purchased it yet ! i am researching to make sur i get what i want. i am looking at a psi genesis motor.

i m in chat if its easier

Dave400ex

08-09-2002, 04:57 PM

I don`t remember the Chat Link. If I were you I would get a Sparks or Duncan Powervalve. Sparks rips it up.

08-09-2002, 04:59 PM

http://pub21.bravenet.com/chat/show.php?usernum=1764312952

but psi is only a hop skip and a jump from where i live if i have a prob i can drive there and take care of it. and they seem solid and reliable from what i understand, im looking for reliability more than the hp.