Don't think so, based on the kx450f just like the yamaha, honda, and suzuki 450's are.

 

It'll be hands down way faster than the other 450's.......IN REVERSE!!!!!
Hahaha I love it.

 

Yea, but just because the others have done so, does'nt mean that kawi will do the same. It even says on the limited information we have, "All-New Engine". And even so, you say it is based, but it will be nothing like it, the dirtbike engine has no EFI, jus normal carbs, and endless things I cant name, cuz no one knows yet. The only thing that is safe to say is that kawasaki has done their homework and will domminate in the 2007 seasons.

 

All it would take to run efi on the existing engine would be to bolt it up and program it. It's a single intake runner, the only hard part is the tuning.

Sure it's likely to a modified bottom end designed for the extra reverse gear, counterbalancer, and other normal changes that have taken place in the vast majority of motorcycle engine conversions to atv duty.

Take a look at the pictures of the atv and kx450f bike, the engine is the same from the jug up, and a lot of the bottom end lines up as well.

 

The only thing that lines up is the color and the top end. The whole bottom is completely reversed. Not the same. If you dont think so, check out these pictures on the following websites.

http://images.google.com/imgres?imgu...saki/KX450F_05.
jpg&imgrefurl=http://www.off-road.com/dirtbike/machines/2006/kawasaki/kx450f.html&h=532&w=800&sz=78&hl
=en&start=5&tbnid=PHS0nC6fAR6kaM:&tbnh=94&tbnw=142 &prev=/images%3Fq%3Dkawasaki%2B450%255C%
2Bdirt%2Bbike%2Bengine%26svnum%3D30%26hl%3Den%26lr %3D%26sa%3DG


and


http://www.atvscene.com/machines/kaw...stlook-06.html

 

most of the engines are derived from dirtbikes b/c thats historically where the R/D went.
however i think we are finally seeing the atv side catch up a little more, a little quicker than in the past...but for the most part, the engines still start off in the dirtbike world then are 'adapted' for atv use.

the 04/05 TRX450R had a disticntly different and 'tamer' engine than the CRF version; most all the internal components were different. it wasnt until the 06 model that honda pretty much gave it the CRF-X's engine, still with only slight mods for atv use.

yamaha pretty much gave the YFZ the YZF's engine with a timing change on one of the cams and they "beefed" up and altered some things in the tranny if i remember the initial comparison and press release on it corectly from 2003. if im off on this one, jump in and let me know...

but until the final specs are relased on the atv version of the KFX450, judgement should be suspended until then on what they actually DID in the engine department. otherwise peple argue for days over it...unless someone can locate or sneak some more pics and specs out for us! we are all eager to see this bike. im glad its coming out, kawasaki deserves a their own winner in the sport arena, and if they did this one right, they will have it. Like i said earlier in this thread or another, kawasaki is capable of building a kick@ss engine!

 

Yes, see, I agree with you. No arguments can be made untill the specs are out. Also, kawasaki can kick @ss when they want to.

 

So how much do you think it will weigh?

 

To be competitive, it'll have to be under or very close to 350lbs. That will be an interesting feat if it really does have EFI, reverse and electric starting.

 

Well, wouldnt you think that since there is an aluminum frame, that it would make up the weight for all the extras?