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kx250F
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Posted by: sako---------------------

New to the site....pardon my ignorance.

Is there any differences in the 2006 KX250F thru 2008? It's a 4 stroke correct?

Posted by: atkkid250---------------------

yup its a four stroke, the carbs are different, from the 05, to the 08 the compression is different, 08=13:5:1, 05 = 12:5:1.
and finally the 08 is a true 250 cc, while the 05 is merely a 249. look it up on the yamaha website, i believe you can compare?

Posted by: _JOE_---------------------

Quote:

Originally Posted by atkkid250

look it up on the yamaha website, i believe you can compare?

I would try the Kawasaki site first.

Posted by: atkkid250---------------------

haha my bad, damm how'd i do that one? switched them out. damm. o well. what he said lol. wowwwww, alztheimers at such a young age... what is in the food my parents feed me? lol

Posted by: tyler_43---------------------

lol yeah, the 2006, 2007 and 2008 kx250f's aren't much different at all. I've owned a 2006 and my buddy just bought a brand new '08... the '08 has a little more bottom due to a slighly different cam and the suspension is a bit more plush; tiny differences though.

Posted by: sako---------------------

thanks for input

Posted by: slinger34---------------------

The review in Motocross action gave the KX250F a good review. They said the 08 engine felt like a clone to the 07. The bike is all about power. It lacks a little low end but hits hard at 7,000rpms and pulls good up to 13,000. The only flaw was that shifting from 2 to 3 ends up staying in 2 if you dont give it enough foot. For trail riding it is good but racing, the shifing might be a little hard if your on the gas. Same goes for the 07 model too. Still a great bike

Posted by: IndyMX---------------------

Quote:

Originally Posted by atkkid250

yup its a four stroke, the carbs are different, from the 05, to the 08 the compression is different, 08=13:5:1, 05 = 12:5:1.
and finally the 08 is a true 250 cc, while the 05 is merely a 249. look it up on the yamaha website, i believe you can compare?

I know you thought Yamaha did some magic to come up with a displacement of 250cc, but you'd be wrong.

It's still 249cc. Do the math.

Posted by: atkkid250---------------------

how so? on their website they say teh dimensions right haha. my bad. my friend has allready lloked this up so he told me. thats why i only knew the 08 to 05. why would they label one as 249 and the other as a true 250 then? thats nutty

Posted by: IndyMX---------------------

Marketing.

Posted by: atkkid250---------------------

ahh lol that would explain alot. why are they allways one cc off? is it easier to make the 249. dimension wise? i hardly ever see an actual 250. same with the 150's as well.

Posted by: tyler_43---------------------

i dunno most bikes have always been that way... the exception being the 80's before they changed them to 85's. My yz125 is 124cc... I dunno maybe the theory is if a certain organization only allows you to have a 125cc bike in a certain class if it was a 125cc to start with it could wear and become a 125.1cc etc... though that's not gonna happen with any new bike as they call have coated cylinders. Though this is just my theory, I'm probably completely off haha

Posted by: sako---------------------

One last question on the kx 250f....will it be suitable for more off-road riding than track? I just have a smoking deal on one that I hate to turn down if it does just fine. My other option was a CRF250x for off-roading

Posted by: _JOE_---------------------

The crf-x is a much better off-road bike in my opinion.

Posted by: mox69---------------------

Quote:

Originally Posted by sako

One last question on the kx 250f....will it be suitable for more off-road riding than track? I just have a smoking deal on one that I hate to turn down if it does just fine. My other option was a CRF250x for off-roading

If the KXF is a good deal I wouldn't turn it down. The CRF-X has a headlight and different gearing I think (main differences).

It also has somewhat restrictive exhaust and a differen't cam than the CRF. Its still fast, just not as fast as a KXF would be.

So I don't know how fast you are planning on going, but the KXF will be plenty fast, but require a headlight to ride at night. The CRF-X has the headlight, but will require some mods to bring it up to par with a KXF.

Posted by: _JOE_---------------------

The crf-x is ported different and has a different cam than the mx version. It also has a wide ratio tranny so it will have a higher top speed which is nice for long fire roads, but less ferocious acceleration. The x has smoother acceleration and plusher suspension. And as mentioned, lighting. It is also e-start.

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