I am wondering which is faster. a 400ex with a Yzf426 engine in it.. or a Yamaha Yfz450. please lemme know[img]i/expressions/face-icon-small-confused.gif[/img]

 

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i would think the 450 engine would be faster...but why in a 400ex frame? i wouldnt screw around and put one of these engines in a 400ex frame unless i got it real REAL CHEAP...otherwise it may defeat the purpose. you know yamaha and honda already makes 450 quads - you dont have to make your own anymore!

 

If you have the stuff to do it then I dont see why not. Sounds like something interesting to see. Good luck if you do it.

 

i think the yfz would beat it mostly everywhere. especially if you put it in a 400ex frame.

 

It all depends on tuning. I know a guy with a crf in a 250r frame who can wipe out all but one yfz in the area. Stock, the yfz will probably not hold up to a bike engine when properly tuned, even without any performance mods on either.