250r vs. 250x
 

I plan on getting a 250x or r for a supermoto build. I'm leaning towards the X, cause its more offroad oriented and the 250r is for race. I don't race but I occasionally like to smack up the trails.

I've got a few questions:

People tell me that there's a huge difference between the R and X. For example, they say if I got the R, I'd be burning valves and eating sprockets between every few tanks of gas. Yet when I look at the specs between the R and X, they seem to have the same motor, different tranny. So wouldn't I be doing all the same amount of maintenance on the X? Or is there a difference in the motor that makes it lower maintenance and less-peaky?

Thx in advance.

Re: 250r vs. 250x
 

Basically what I'm asking I guess is:

Is the 250r really that race-oriented that its not suitable for offroad and normal use?

Re: 250r vs. 250x
 

will this be for road use, or just track? if for the road, go with the x. it should have a stator that can handle lights and everything. the gears on the x are probably more highway speed friendly as well. I think that the engines may have different heads, or at least different cams. either way, you should check the valves often to avoid problems. if this is going to be a track bike, the r will be better. are you still going to ride off road (with the dirt tires)? i think if that is the case, either one should be fine. I would go for the "R" unless you plan to make it street legal. but if you are going to be street legal, you might want a 450. sorry if this doesnt help any.

Re: 250r vs. 250x
 

I don't race. I thought the X might be better for a combination of offroading and stunting.

I was just wondering if the X is less maintenance than the R. From what I've read on the internet, I think so.

The X has a wide-ratio trans while the R has a close-ratio for track. The R will obviously jump off the line faster, but the X has higher top-speed.

Which tranny is better for stunting?

Re: 250r vs. 250x
 

i just bought the R last week.... already swapped bodywork and swapped to sm wheels.... here are the differences

stator
cams
i dont know why they would change the whole tranny when they could just change sprocketing.... but who knows.... am having a blast on the R... a valve adjustment is actually really easy just read the owners manual.... but i do plan on putting better valves in on my first topend rebuild when its due (also easy) i cant remember which ones they are but there are some valves out there that require ALOT less adjusting.
heres a pic for ya!
[ATTACH]316785[/ATTACH]

Re: 250r vs. 250x
 

X model tranny has a shorter 1st gear and taller 4th and 5th gears than the R model. the motors are nearly identical minus the porting and the camshaft as someone said earlier. X-will be better for slow stunting because its made to run more in the lower RPM range...its got more torque and is less prone to stalling in the lower revs that the R model....

Re: 250r vs. 250x
 

[quote=Mikeith;2734850]i just bought the R last week.... already swapped bodywork and swapped to sm wheels.... here are the differences

stator
cams
i dont know why they would change the whole tranny when they could just change sprocketing.... but who knows.... am having a blast on the R... a valve adjustment is actually really easy just read the owners manual.... but i do plan on putting better valves in on my first topend rebuild when its due (also easy) i cant remember which ones they are but there are some valves out there that require ALOT less adjusting.
heres a pic for ya!
[IMG]http://i23.photobucket.com/albums/b375/MIKEITH/mycrfsm.jpg[/IMG][/quote]


nice:YEAH

Re: 250r vs. 250x
 

[quote=Mikeith;2734850]i just bought the R last week.... already swapped bodywork and swapped to sm wheels.... here are the differences

stator
cams
i dont know why they would change the whole tranny when they could just change sprocketing.... but who knows.... am having a blast on the R... a valve adjustment is actually really easy just read the owners manual.... but i do plan on putting better valves in on my first topend rebuild when its due (also easy) i cant remember which ones they are but there are some valves out there that require ALOT less adjusting.
heres a pic for ya!
[IMG]http://i23.photobucket.com/albums/b375/MIKEITH/mycrfsm.jpg[/IMG][/quote]

Yeah that's really nice. How often do you need to rebuild top end/adjust valves? People say once a year...

Re: 250r vs. 250x
 

book says for "racing" valves need to be checked every 6 hours or 3 races... not necessarely adjusted just checked.... and a top end every 15 hours..... but usually it really only needs to be done once a year.... its not expensive to have done either

Re: 250r vs. 250x
 

[QUOTE=Mikeith;2735875]book says for "racing" valves need to be checked every 6 hours or 3 races... not necessarely adjusted just checked.... and a top end every 15 hours..... but usually it really only needs to be done once a year.... its not expensive to have done either[/QUOTE]

and thats if youre constantly on and off the throttle hard like you would be if you were on a track.

Re: 250r vs. 250x
 

you dont need ot check your valves every six hours thats bullshit.....i check mine on my yzf250 every six months and it runs like a champ..also a good freind of mine has a 250 f....has raced it for a year straight and the only thing hes ever done to it was change the oil and clean the air filter....250s ar bullet proof..its the 450s that suck balls

Re: 250r vs. 250x
 

Sweet, this is what I want to hear!

So I shouldn't lean heavily towards the 250x just because its more for the trail than race.

Re: 250r vs. 250x
 

[quote=Schooler;2736328]you dont need ot check your valves every six hours thats bullshit.....i check mine on my yzf250 every six months and it runs like a champ..also a good freind of mine has a 250 f....has raced it for a year straight and the only thing hes ever done to it was change the oil and clean the air filter....250s ar bullet proof..its the 450s that suck balls[/quote]


The YZ250F is damn near bullet proof I know alot of people that go with-out adjusting the valves because the clearance never changes. The CRF250 stock valves suck...mine went 1 good strong year and that was it before the intake valves were toast...and when they wear out they beat up the seat real bad too so you have to either get a new head or get your seats re-cut. Alot of people switch over to steel valves for valve train reliability. Its like everything else.....the harder you ride it the sooner it breaks. I know alot of people whos CRF valves didnt last a couple months from being new. There is a post somewhere in here about the Honda valves thats pretty interesting.....I did hear that the 06' YZ250Fs are common for snapping the valve stem. All bikes have they're flaws, you just have to stay on top of the maintenance and take no shortcuts when servicing them.

Re: 250r vs. 250x
 

im not sure about the 450s but again I know the Honda has the less reliable valve train system than the other bikes...

Re: 250r vs. 250x
 

[quote=Reyals Bemus;2736659]Sweet, this is what I want to hear!

So I shouldn't lean heavily towards the 250x just because its more for the trail than race.[/quote]


Its all in what you want....if you want a 250X but want the power of the R, put a flowing exhaust on it and a r-model camshaft...best of both worlds....used stock R- cams are cheap....hell I have an extra 05 R model cam from when I put an aftermarket Webb cam in mine.

Re: 250r vs. 250x
 

The 250X has plenty of power, considering I'm moving up from the 150 fun bike.

Maybe checking the valves every oil change would be a good habit?

So I'm hearing that I should buy steel valves off the bat for reliability, bulletproof-ness and less adjusting over time.

Re: 250r vs. 250x
 

Not really the valves on the X shoudnt be an issue as the cam is far less aggressive than the R model...I would run the stock motor just keep your oil and air filter changed and take a peek at your valve clearance every so often...The people that race they're R models and beat the hell out of them are the ones that usually have the valve problems. I almost promise you very little problems from your X model if you maintain it correctly and dont ride it around on the rev limiter.

Re: 250r vs. 250x
 

and ive found out that once its time to adjust the valves the valve wear has already started to occur...you can keep adjusting them but your just beating your seats to death.

Re: 250r vs. 250x
 

So at that point, just replace them?

What are the stock valves made of? Lower-quality steel or something?

Re: 250r vs. 250x
 

stock intake valves on both the R & X models are made of titanium....exhaust valves are steel. The problem isnt really the valve its a combination between the valve spring and the valve seat. The spring cannot control the valve during high revs. The valve actually floats (looses its contact with the lobe of the cam) believe it or not a stiffer spring will keep the valve in contact with the lobe so it doesnt smack into the seat. The valve seats are also super hard so they dont cushion the valve when it seats, plus it doesnt wear with the valve. Titanium is strong as steel but not as hard...you dig? Titanium is also very brittle once it passes its flex point. Again its not in the valves its the spring/seat.

Re: 250r vs. 250x
 

again you should have no problem with the X model

Re: 250r vs. 250x
 

Alright, I getcha.

Besides places like Craigslist, WantAds and eBay, are there any other pretty big classifieds sites/mags that I should look at?

I was just about to buy a 250X tomorrow, but some guy got to it just before me.

Re: 250r vs. 250x
 

yeah they will be advertized everywhere...theres far fewer x models than R models around so im not sure how difficult it may be to find one that works for you...

Re: 250r vs. 250x
 

O.K. Well thanks for your help so far. I think I've got a 250X in Pine City, NY, that I'll be picking up this weekend.

Re: 250r vs. 250x
 

How much $$$ do you have to spend? I'd go with a leftover 06 if you have enough. :YEAH

Re: 250r vs. 250x
 

I've got very little. At most $3000.

Re: 250r vs. 250x
 

[quote=Reyals Bemus;2739473]I've got very little. At most $3000.[/quote]


ehh, im not sure if that will be enough...the '04 R models are still going for around $3,500, the X models usually sell for higher....if you can get one for 3k jump on it fast. What year did the 'X' come out??? Was it 05?

Re: 250r vs. 250x
 

The X first came out in 2004. I have a deal on a '04 one right now for $2800. Guy has a complete FMF Q exhaust on there and just had a complete top end job and valves adjusted. Extra set of plastics too.

Original Ad URL: [url]http://www.thumpertalk.com/classifieds/showproduct.php?product=24431&cat=all[/url]
[U][/U]

Re: 250r vs. 250x
 

I GOT YM 04 YZF 250 FOR 2800..AND ITS CLEAN AS FUCK/.. Look in ur local newspaper classifieds

Re: 250r vs. 250x
 

You should have been checkin out craigslist, I just sold my MINT KX250F for $3000 with extras.

Re: 250r vs. 250x
 

[quote=Reyals Bemus;2739473]I've got very little. At most $3000.[/quote]


Do you work? maybe you could put 3 down and finance the rest.

Re: 250r vs. 250x
 

[quote=Reyals Bemus;2739959]The X first came out in 2004. I have a deal on a '04 one right now for $2800. Guy has a complete FMF Q exhaust on there and just had a complete top end job and valves adjusted. Extra set of plastics too.

Original Ad URL: [URL]http://www.thumpertalk.com/classifieds/showproduct.php?product=24431&cat=all[/URL]
[/quote]


jump on it...

Re: 250r vs. 250x
 

[quote=Schooler;2739967]I GOT YM 04 YZF 250 FOR 2800..AND ITS CLEAN AS FUCK/.. Look in ur local newspaper classifieds[/quote]


I have a '04 YZ250F stolen from a big ass stunt show...had those yellow michelin tires on it and no one saw a thing....life goes on.

Re: 250r vs. 250x
 

[quote=E-Loc540;2740053]I have a '04 YZ250F stolen from a big ass stunt show...had those yellow michelin tires on it and no one saw a thing....life goes on.[/quote]


That sucks Bro, you'd think your stuff would be safe at a stunt show. :banghead

Re: 250r vs. 250x
 

That sucks... initial karma?

I'm 15, so I can't find half a decent job around here that could rake in much. I don't want to work at Market Basket either...

Re: 250r vs. 250x
 

[quote=Reyals Bemus;2740068]That sucks... initial karma?

I'm 15, so I can't find half a decent job around here that could rake in much. I don't want to work at Market Basket either...[/quote]


:LOL I feel ya, when I was your age that was the only shithole that would hire me. Try looking for a roofer or someother trade that you can work for on the weekends. They'll pay the best and you'll learn something.