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How easy to make a 250X into a 250R?

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I am thinking about buying a crf250x (or wr250f) and turning it into a crf250r (or yz250f) or at least as much as I can within reason.  I mainly ride tracks, and i would much prefer to have the motocross version of these two bikes, but I live in california and don't want the red sticker and give up being able to ride at two parks that are within an hour of where I live and follow the green sticker/red sticker deal.  (Yes I know you can still ride at tracks year round, which I ride at as well, but my fiance who just started riding prefers going to the OHV parks). I don't race and I'm definately a novice level rider on the motocross track, so I dont need the latest and greatest motocross machine.  I had a 2006 yz250f a couple of years ago before I sold all my bikes because of bills to pay and I loved that bike.  Felt waaay lighter, faster, and handled better than my friends stock 2003 wr250f.  

 

So if I bought either a crf250x or wr250f (2007 or later because I want the aluminum frame), I would send the suspension off to get revalved and stiffened up for motocross riding (and maybe shortened an inch or two because I like the feel of pit bike/smaller bikes) and I would also take off the lights and possibly the e-start in order to shave off as much weight as possible. I was also planning on switching the gas tank,seat, and plastics over to the motocross versions to give the bikes a more slim feel and reduce weight some more.  Also was planning on doing some minor motor mods such as aftermarket exhaust, cam, etc and  anything else thats not too expensive but would make the motor compariable to the 250R (or 250f).  

 

My question is, how easy (and expensive) is it to turn the 250X into the 250R?  How close can you get the X to feel like the R? (both motor wise and suspension/weight/handling wise?).  Obviously the 250x will never be like the the newer EFI 250R, but if I could get the 250X to feel close enough to an older 250R (2004-2008 for example) I would be satisfied.  

 

What mods do you think would be absolutely essential for doing this conversion?  Whats the approx. cost for these mods?  Also do you think its worth the money to switch the rear wheel to a 19" vs the stock 18" for motocross riding?  Or does it not make that much of a difference? 

 

What bike would be easier to convert to its motocross version?? The WR250F or CRF250x?

Edited by punkguitarist

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My suggestion?  Buy both<g>

 

Seriously, the one thing you won't get around is that the X has a wide ratio tranny.

 

Other than that, it's everything you outlined (exhaust, cam, etc).

 

and I would not remove the electric start.   On the 450's anyway, there have been a number of folks that end up with cracked cases.  Of course they were made as thin as possible to save weight and with the idea that e-start was built in.   While the 450 takes a lot more to kick, I would not rule out the same problem with the 250 over a long period.

 

Jim.

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Well why don't you just buy the version that you want and not worry about paying for mods. And I think the only differences are plastics(head light/taillight) and gearing.

Did you not read what I wrote?  The reason I am buying a crf250x or wr250f instead of crf250r or yz250f is because I live in california and I want the green sticker that the trail bike versions have (in case you dont know about the green sticker red stick thing, basically motocross bikes can't ride on trails or OHV parks 4-5 months out of the year)

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My suggestion?  Buy both<g>

 

Seriously, the one thing you won't get around is that the X has a wide ratio tranny.

 

Other than that, it's everything you outlined (exhaust, cam, etc).

 

and I would not remove the electric start.   On the 450's anyway, there have been a number of folks that end up with cracked cases.  Of course they were made as thin as possible to save weight and with the idea that e-start was built in.   While the 450 takes a lot more to kick, I would not rule out the same problem with the 250 over a long period.

 

Jim.

Ya actually I think I well keep the estart because it woudl come in handy.  Ill probably just replace the stock battery with something lighter. I have thought about buying a complete crf250R motor on ebay or something and dropping that in my 250x chassis and then selling my 250x motor on ebay to recoup some of the costs.  Because from the DMVs point of view, the only thing that matters about green/red sticker is the vin number on the frame. 

 

Actually I think I just found the solution to my issue!!  I could buy a complete yz250f or crf250r and then buy just the frame of a crf250x or wr250f that comes with dmv paperwork on ebay and swap the parts over !!  This should work fine ya???!!

Edited by punkguitarist

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So am I.

 

But seriously read Rick Ramsey site on the 250X for info on the differences to the R. Then you can can decide the best route to have  R performance on an X. For me I would attempt to decide how much money would be needed to ride a Red sticker bike the few times that I couldn't.  Life is always full of compromises and some choices are more expensive than others.

Edited by Chuck.

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I am thinking about buying a crf250x (or wr250f) and turning it into a crf250r (or yz250f) or at least as much as I can within reason.  I mainly ride tracks, and i would much prefer to have the motocross version of these two bikes, but I live in california and don't want the red sticker and give up being able to ride at two parks that are within an hour of where I live and follow the green sticker/red sticker deal.  (Yes I know you can still ride at tracks year round, which I ride at as well, but my fiance who just started riding prefers going to the OHV parks). I don't race and I'm definately a novice level rider on the motocross track, so I dont need the latest and greatest motocross machine.  I had a 2006 yz250f a couple of years ago before I sold all my bikes because of bills to pay and I loved that bike.  Felt waaay lighter, faster, and handled better than my friends stock 2003 wr250f.  

 

So if I bought either a crf250x or wr250f (2007 or later because I want the aluminum frame), I would send the suspension off to get revalved and stiffened up for motocross riding (and maybe shortened an inch or two because I like the feel of pit bike/smaller bikes) and I would also take off the lights and possibly the e-start in order to shave off as much weight as possible. I was also planning on switching the gas tank,seat, and plastics over to the motocross versions to give the bikes a more slim feel and reduce weight some more.  Also was planning on doing some minor motor mods such as aftermarket exhaust, cam, etc and  anything else thats not too expensive but would make the motor compariable to the 250R (or 250f).  

 

My question is, how easy (and expensive) is it to turn the 250X into the 250R?  How close can you get the X to feel like the R? (both motor wise and suspension/weight/handling wise?).  Obviously the 250x will never be like the the newer EFI 250R, but if I could get the 250X to feel close enough to an older 250R (2004-2008 for example) I would be satisfied.  

 

What mods do you think would be absolutely essential for doing this conversion?  Whats the approx. cost for these mods?  Also do you think its worth the money to switch the rear wheel to a 19" vs the stock 18" for motocross riding?  Or does it not make that much of a difference? 

 

What bike would be easier to convert to its motocross version?? The WR250F or CRF250x?

 

Theres alot of guys on this forum that have made quite a few changes to their 250X using 250R parts. Exactly where you would draw the line in your conversion or transformation is up to you, it is alittle different from person to person although there are some necessary changes or mods that (almost) every 250X needs, check out Rick Ramsey's website.

 

I bought a new 05 250X without doing much research and after a few rides realized it wasnt going to work out well like it was. Since then have done alot of performance mods but didnt start out to make it into a 250R, and that still isnt the goal.  

Really just wanted a better performing, lighter bike with more power and have got it real close to what I originally wanted out of the bike. Would have been great to be able to buy it like this from the start and not have to put a bunch of work and $ into it after the purchase. I could have bought a new 250R instead but didnt want to then and still dont, also could have bought a 450 which probably would have been an R but didnt want or need that much power or additional weight.

 

IMO the bottom line is buy the bike that is the closest to what you want.

 

Our 250X has had many mods done to it, some of them are front and rear suspension upgraded-which I highly recomend, lightened up by removing the kickstand, battery, starter and most of the related components. Engine performance upgrades include a different cam, high comp piston, gearing and a few other things. 

 

The bike now has alot of hours on it but is still alot of fun, reliable and alot more versatile than it was before the mods. No comparison between when it was new and now.

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Actually I think I just found the solution to my issue!!  I could buy a complete yz250f or crf250r and then buy just the frame of a crf250x or wr250f that comes with dmv paperwork on ebay and swap the parts over !!  This should work fine ya???!!

 

This would seem to be the most simple and cost effective solution. This would be a bolt in swap for the 04-09 CRF250R components into any year CRF250X frame. My only concern is that I am under the impression that your rangers in Cali have been trained to spot check for missing smog equipment. You may need to mount a "dummy" 250X smog pump in order to pull this off.

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Did you not read what I wrote?  The reason I am buying a crf250x or wr250f instead of crf250r or yz250f is because I live in california and I want the green sticker that the trail bike versions have (in case you dont know about the green sticker red stick thing, basically motocross bikes can't ride on trails or OHV parks 4-5 months out of the year)

 

 You know, there's the old saying "you can't have your cake and eat it too".

 

 Rant ON

 

 Maybe you shouldn't be living in CA.   CA has those rules for a reason and your trying to game the system.

 

 It's things like this that cause more and more restrictions to be placed on off-road use.

 

 It's no different than the guy that comes to an event with a stated 92db sound requirement, but it's clear their running in the 110+ range.

 

 Ride responsibly or don't bother.

 

 Rant OFF

 

 Sorry, but questions like this just kill me...

 

 Jim.

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Theres alot of guys on this forum that have made quite a few changes to their 250X using 250R parts. Exactly where you would draw the line in your conversion or transformation is up to you, it is alittle different from person to person although there are some necessary changes or mods that (almost) every 250X needs, check out Rick Ramsey's website.

 

I bought a new 05 250X without doing much research and after a few rides realized it wasnt going to work out well like it was. Since then have done alot of performance mods but didnt start out to make it into a 250R, and that still isnt the goal.  

Really just wanted a better performing, lighter bike with more power and have got it real close to what I originally wanted out of the bike. Would have been great to be able to buy it like this from the start and not have to put a bunch of work and $ into it after the purchase. I could have bought a new 250R instead but didnt want to then and still dont, also could have bought a 450 which probably would have been an R but didnt want or need that much power or additional weight.

 

IMO the bottom line is buy the bike that is the closest to what you want.

 

Our 250X has had many mods done to it, some of them are front and rear suspension upgraded-which I highly recomend, lightened up by removing the kickstand, battery, starter and most of the related components. Engine performance upgrades include a different cam, high comp piston, gearing and a few other things. 

 

The bike now has alot of hours on it but is still alot of fun, reliable and alot more versatile than it was before the mods. No comparison between when it was new and now.

U say buy te bike closest to what I want. What I want is a green stickered 2014 fuel injected yz250f or crf250r. But this doesn't exist for us lucky ones living in California so I have to do it the hard way which is the frame swap. Does anyone know if the newer (2010+???) crf250r fuel injected motor and parts would bolt into a crf250x frame? The funny thing is because of the green sicker law in California , 250x bikes sell for more than the same year 250r.

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This would seem to be the most simple and cost effective solution. This would be a bolt in swap for the 04-09 CRF250R components into any year CRF250X frame. My only concern is that I am under the impression that your rangers in Cali have been trained to spot check for missing smog equipment. You may need to mount a "dummy" 250X smog pump in order to pull this off.

 

I think you would also need a X cyl head with provisions for the smog aparatus to connect to otherwise it would be to obvious thats its non compliant, but I dont know how close they check over the bikes.

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U say buy te bike closest to what I want. What I want is a green stickered 2014 fuel injected yz250f or crf250r. But this doesn't exist for us lucky ones living in California so I have to do it the hard way which is the frame swap. Does anyone know if the newer (2010+???) crf250r fuel injected motor and parts would bolt into a crf250x frame? The funny thing is because of the green sicker law in California , 250x bikes sell for more than the same year 250r.

In AZ used Xs sell for much more than Rs, which seems strange since it is very easy to street plate a dirt bike in AZ, and there are no  Green/Red sticker issues.  Phoenix Craig's List ads for Rs number 10 times Xs, and the asking prices are much lower; seems to be supply/demand in the used market compared to to the new market.

 

I doubt if all of the R parts will bolt onto an X frame, or vice versa;  the two bike models, and their various years, have different bracketry for their different equipment and options.

 

Based on doing a few engine conversions and many major mods over the years I would suggest that based on your requirements it would be easier, faster, and cheaper to buy a Green sticker bike and a Red sticker bike.    Two other benefits; the flexibility of 2 bikes, and avoid the future difficulty of selling a franken bike. Also a MX bike is not the best choice for escorting other riders.

Edited by Chuck.
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I doubt if all of the R parts will bolt onto an X frame, or vice versa;  the two bike models, and their various years, have different bracketry for their different equipment and options.

 

 

 

Based on my experience with swapping 250X & 250R components this is not true, as long as the 250R is 04-09 everything can be swapped onto the 250X frame with the exception of the steering damper from the 08-09.

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Actually I think I just found the solution to my issue!!  I could buy a complete yz250f or crf250r and then buy just the frame of a crf250x or wr250f that comes with dmv paperwork on ebay and swap the parts over !!  This should work fine ya???!!

 

That's what I was going to suggest.  Then I'd suggest starting a campaign to vote out those stupid lefties out there to start getting rid of the stupid communist laws that you poor bastards have to live with.

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That's what I was going to suggest.  Then I'd suggest starting a campaign to vote out those stupid lefties out there to start getting rid of the stupid communist laws that you poor bastards have to live with.

 

 That works for a while, until you can no longer breath. :thumbsdn:

 

 CA has some unique weather and geography to deal with, which is why it has some of the most stringent emission requirements in the country.

 

 and if you don't think smog is a problem, one only needs to look at Beijing in China.  They have days now where people are not supposed to even go out of the house!   People there are starting to show open discontent with the Chinese government over smog, and in China, that's saying something.

 

  LA is not as bad as China, but only because it does have rules.

 

Jim.

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 That works for a while, until you can no longer breath. :thumbsdn:

 

 CA has some unique weather and geography to deal with, which is why it has some of the most stringent emission requirements in the country.

 

 and if you don't think smog is a problem, one only needs to look at Beijing in China.  They have days now where people are not supposed to even go out of the house!   People there are starting to show open discontent with the Chinese government over smog, and in China, that's saying something.

 

  LA is not as bad as China, but only because it does have rules.

 

Jim.

 

Yup - gawd knows they'd have to shut down LA if not for preventing all those extra exhaust gasses at Hollister and Metcalf.

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The LA Basin  use to be as bad as China.

Yup - gawd knows they'd have to shut down LA if not for preventing all those extra exhaust gasses at Hollister and Metcalf.

 

And the East doesn't want Hollister and Metcalf pollutants, just as LA and the West Coast  doesn't want China's.

 

However IMO a few dirt bikes are not the problem, they are just easy for the bureaucrats to go after.

 

Thank you CA for the stupid and difficult to use gas cans.

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CA has some unique weather and geography to deal with, which is why it has some of the most stringent emission requirements in the country.

The geography and weather patterns have little to do with what has become a multi billion dollar revenue machine. The EPA, and California Air Resource Board (CARB) have implemented restrictions on select groups, in what they call an effort to crack down on pollution. If you were to total all of the OHV combustion engines and compare their measured CO output with that of say the total amount of passenger cars what percentage of the total CO pollution do you think would be attributed to bikes/quads/buggies/jeeps/boats/pwc/etc versus that of passenger vehicles titled for street use?

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