Dang, yall bought got me talked into buying this bike. I have heard alot of good things about Eric Gorr.  i will let yall know what I decide to do.

mynewcr250, on 27 June 2012 - 07:46 PM, said:

"STOMP" the Honda engine?

HARDLY.

It makes a few more HP, but it's not like putting a CR500 up against a CR250!

And let's not forget... a new KTM 250sx is probably around $8k new.  And lets not forget... they have Orange plastic!

For $2,600 I would buy it right now.

And don't worry about having to mill the cylinder or head.  You honestly do NOT have to do that.
I did not do it to mine, and mine runs great.

Get it, RIDE it awhile, and then see what needs to be addressed with it.
Don't just do what everyone tells you they did to their bikes.  Who knows, you might love it just the way it is.

Definitely BUY it!  Ride it.  Post some pics of it.  Let us know how you like it!

Thanks Sandmantis.

The way everyone was talking I was thinking the head and cylinder had to be done to the bike. Money is kinda tight so I was hoping to get the bike and ride for awhile then start tinkering with it.

SandMantis, on 28 June 2012 - 05:20 PM, said:

lol, msrp on the 07 cr250 was $6499 just from a quick google search, msrp on the 12 250sx is $6899. big whoop. when new, they are about the same price, and the ktm comes with brembo brakes, hydraulic clutch, vforce reeds and so on. let me know what the price difference is between the 2 when they're equally equipped.

but anyways, yea, it will stomp it from a powerband width and overrev perspective. the dynos ive seen on the case reed engines shows that cr is down 3-4hp at 8500, 12hp at 9000, and 20-22hp at 9500 assuming the ktm is equipped with the pc pipe, the info is honest, and we decide the crunching numbers is the way to go. so while the cr will need a shift at the end of the long straight, the ktm just gets pinned and holds the same gear.

you own an 05, so its not surprising to see you defend it, come hell or high water, its gonna be the best in your eyes. the cr is only down a few hp AT PEAK, but peak hp isnt everything.

i own neither (i own a 2k model), and view the data as objectively as possible. i never said the cr was no good and to not buy it, all i said was making the claim thats its the best motor on the planet is far from accurate when the newest ktms seem to have the broadest powerband with the most hp.

as an FYI, i am looking for a 05-07 model to pick up. but like i said, i look at things objectively, not with emotional attachments.

mint 07 CR for 2500$ or brand new KTM for 7000$. It's a tough choice I know. Economy is so great right now I'd run out and purchase TWO brand new KTMs.

Edited by shrubitup, 28 June 2012 - 08:15 PM.

I like other bikes too.  I would buy a new Yamaha YZ250 2-stroke before I bought a new KTM 250.

( I never said the CR had the best engine.  Maybe someone else did, I dunno. )

I am not a Brand picky, if somthing runs good and feels good when I ride it, and has a good price tag, I will ride it. I dont get into all the technical stuff because I will never use the bikes full potential, all I do is trail ride for fun. If I was a professional than it would be a different story.

Hogdgz, on 28 June 2012 - 05:56 PM, said:

My suggestions were not mandatory, they were just the fix for the "problems" that were stated the 07 250's have.  CamP stated that his 250 had a lightswitch power band that was difficult to control and could surprise you at times on the track.  He didn't think it was a safe or usable power delivery so what I suggested caused the bike to smooth out the power delivery and make the power more usable.  Plus he said it had much more low end and more over rev than stock with those mods.  (that was turning down the cylinder and having the squish set).  As far as the carb, the Mikuni carb has very finicky jetting, I would assume that getting a PWK would be at the top of anyones list who has a 3rd gen CR.

One last thing, Eric Gorr will turn down your cylinder and cut your head for a total of $75 per what CamP was saying in his thread.  That is not a bad price for that.  So if you got a 00 250 PWK carb from powersports plus that would be $160 + 75 for the cylinder work, that isn't much to spend for transforming a finicky motor into an awesome one.

Edited by frdbtr, 29 June 2012 - 04:57 AM.

I would not use a '00 CR carb on an 04-07 CR250 beccause it's 16mm longer than the Mikuni w/ TPS. You can stuff it in there, but a short body PWK from a KTM/YZ/RM will fit much better.

These bikes run well on 100LL avgas and it's only $1 more than pump gas. Race gas is expensive and mixing it with ethanol pump gas defeats the purpose of using good fuel.

Edited by CamP, 29 June 2012 - 09:23 AM.

Hogdgz, on 28 June 2012 - 05:56 PM, said:

I would highly suggest sending it to Gorr for .030" base milling. He only charges $35 for that service and it drastically improves the low/mid throttle response, which will be a huge benifit on the track or trail. If you aren't going to commit to usuing good fuel, you'll need to have the head reworked to lower the compression, because these bikes ping on pump gas.

The 05-07 has very erratic power delivery that borders on being dangerous. With some simple machine work and a properly jetted short body PWK, the engine can be transformed into one of the best engines available. That won't set you back much dough if you are smart about it. Less than $100, including gaskets, is what it cost me.

Edited by CamP, 29 June 2012 - 09:33 AM.

Well this is sounding better and better!!!! I ws thinking it would be a couple hundred dollars to send the head and cylinder to  ERIC. I think I could swing the $75 dollars and the new carb. Thanks alot fellas.

Does JD jetting sell carbs? If so could I order one from them already jetted pretty close for my elevation.

Hogdgz, on 29 June 2012 - 12:19 PM, said:

He sells 00 CR250 carbs with his jet kit included they run about $250.  I don't think the longer PWK from the 00 will be a problem.  You will probably have to Loosen up your sub frame to get it installed but it won't be a huge deal.  I put a PWK in my 94 CR125 and you really have to work the 38mm carb into the 36mm hole, I can't see how removing the sub frame and then installing the carb would be much more of a hassle and you aren't going to use the TPS plug anyway.  IMO, buy the carb from powersports plus, get a 45 pilot and ride with everything else stock.  If you want the JD jet kit later, buy it from an ebay seller for $75 and free shipping.

A 16mm longer carb is going to make the airboot collapse somewhat. It will work, but the proper length carb is preferrable.

Hogdgz, on 29 June 2012 - 12:19 PM, said:

This is exactly what I did.  You will pay more for it, but it will have the JD kit in it, and be ready to bolt on and go.