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View Full Version : 250r cylinder and head???


asc180
03-28-2007, 10:17 PM
I bought this on ebay. It was sold as 85 250r parts. Anyone have any ideas??
Billy Golightly
03-28-2007, 10:25 PM
mid 90s CR250 from the looks of it. I can tell it was originally nikasiled cause the displacement is 249cc
asc180
03-28-2007, 10:27 PM
It is ported and polished and the bore is great. I am wondering if I could use it on a 250r lower without the powervalve?
jeffatc250r
03-28-2007, 10:42 PM
I think someone here did it, but from what i recall it required extensive work to make it work. I think it was also tried without the powervalve and didnt run right,
asc180
03-28-2007, 10:47 PM
So I basicly got shafted lol!!!
DeePa
03-28-2007, 10:59 PM
return it for being mis listed? see if you can ship it back and get money back...all else fails, file a complaint thru ebay.

mike
PWK39
03-28-2007, 11:22 PM
If you can't return it I would be interested in it.
grundlegrabber
03-28-2007, 11:27 PM
Looks like a CR to me. It's not going to work with your motor unless you are extremely dedicated and have a large wallet. Don't know how much you paid for it, but odds are you can just resell it on ebay and probably get what you paid if not more. List it as a CR cylinder, I'm sure there's a market fot those!
firefirefire90
03-28-2007, 11:40 PM
There is a way to disable to the PV on it. I think ESR has a blockoff plate...


I think it will fit on your bottom end though. Not sure.
InPiEcEs
03-29-2007, 02:13 AM
Yes.......that is a CR cylinder, not a 250R.
EsR does(did) make a blockoff plate.........not sure how that works.
All that I do know, is that when you disable the powervalve, you have a narrower, but more agressive powerband.
If what you wanted was an R cylinder, then contact the seller, tell them it was wrongly described.
Just make sure you keep your timeframe in mind for eBay, or PayPal protection.
Red Rider
03-29-2007, 08:56 AM
That's a 86-91 CR250R cylinder, and I'm almost positive it's a 1991 because of the bolt-on rear waterjacket elbow. I would be concerned with the big hole drilled into the left rear cylinder port. That shouldn't be there.
asc180
03-29-2007, 09:14 AM
I wonder why it is there?
SYKO
03-29-2007, 10:15 AM
hmmm....that hole..could be a vacum port (or had a fitting there) possibly for a fuel pump of some sort (maybe alcohol?) any ways theres one member here that I talked to about putting a pv top end on my 250r motor and he said esr does make block off plates, it makes wicked power but the plates have to be welded in though, and you need longer head studs to mount the cyl, but if you didnt get it for that much I would slowly get the parts needed for the conversion if it was mine. .02 cent is done!
asc180
03-29-2007, 10:50 AM
I am looking for those plates if anyone has a link. I was on ESR this morning and didn't see them.
Billy Golightly
03-29-2007, 10:53 AM
Thats just where a waterneck would go in and use the same type of hoses the ATCs do. I think the ATC ones will even come out a regular cylinder with some work and probably press right in there.
asc180
03-29-2007, 10:58 AM
Billy are you talking about the hole on the side?
Bryan Raffa
03-29-2007, 11:14 AM
this is hrc powervaled CR motor he uses the block off plates.. read up,, I have personally SEEN it run and IT RIPS!
http://www.3wheelerworldforums.com/showthread.php?t=53934&highlight=cr+powervalve
SYKO
03-29-2007, 11:27 AM
YEPO! thats who you need to talk to!
Billy Golightly
03-29-2007, 01:41 PM
Billy are you talking about the hole on the side?


Na I'm talking about the round hole above the intake. The regular 250R cylinders have a waterneck right there. I don't know enough abour the CR250 to know if that is stock or not on this one, but if it isn't, then its there so that a person could run the stock configuration hoses. The holes on the sides towards the exhaust are powervalve covers.