what kind of motor for 250r should i do?

I'm posting this for a friend he is curouis how big of cc motor he should for mx or if he should do a 265cc power vavled motor or something along those lines


Thanks
John

If he's got the money....265PV all the way. There are several good ones out there.

If he wants to spend a little less, he could build a 265 spacer plate and get the cylinder nikasil plated for quite a bit less than a powervalve kit

Who makes the best power vavle for the cost

Thanks
john

i have a lrd 265 powervalve and the thing moves out, i love it.if your racing the nationals or something like that then a 265pv is the way other wise, if you have the cash i would consider a 310pv or a 330pv

Quote:

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Originally posted by Trx450rr
I'm posting this for a friend he is curouis how big of cc motor he should for mx or if he should do a 265cc power vavled motor or something along those lines


Thanks
John

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What class is he running? Unfortunately the tides are turning in favor of the 4 strokes in MX racing thanks to their double the cc handicap :grr:
If he's running open he can build a pretty ballistic 2 stroke.

He races B class he's pretty much a weekend warrior but it never hurt anybody to build a little bit bigger than is allowed=)

Thanks
john

Quote:

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Originally posted by Trx450rr
He races B class he's pretty much a weekend warrior but it never hurt anybody to build a little bit bigger than is allowed=)

Thanks
john

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Well, the problem is the boring limit on a 87-89 cylinder is .080 which is 265cc. If you go to a bigger cylinder like Niks or Pro-X it's pretty ovbious it's over the 265cc class limit.
If he doesn't care about classes, the sky (and your wallet) is the limit.