CR500/KX500 Quad

[ElDiablo52]

Hey is it a good idea to stuff one of these or any BIG two stroke bike engine in a quad. Ive always been into the Trx500R deal but all I ever heard was they are crap cuz the frames crack and such from the vibrations. Well is there anything out there to solve thise other then rubber mounts. Also anyone have any long term experience with a quad like this. I think a Cr500 in a R or 400EX frame or something would be a good project and a wicked fast trail bike.

[ONLY2STROKES]

yeah the crankshaft must be balanced along with the flywheel being used.

[Dier-Wolf]

See my posts.

[azquadzilla]

a 400ex frame might be too short making it want to wheelie a lot. im not sure about this but itd be the nicest bikeyou could always extend the swingarm by like 2 inches. but go with the cr500!

[NOTHINGBUT250R]

Having a 500 motor in a quad it will wanna wheelie no matter what but if i built one I would pry put one in a 250r frame like everyone else

[flotek]

id just save yourself a lot of headache and build a stroker or cheetah banshee or a stroked 300 +cc 250r and have an open class machine thats reliable and doesnt have ot be fabbed ,welded and molested up

[ElDiablo52]

whats the fun of not welding or fabbing? thats what I went to school for.

[zuki500]

CR500 in a LT250R frame isn't too bad of a project. The rear engine mount lines up good and only requires a couple spacers. You'll need to weld-in a headstay mount, and fab up some lower motor mounts. The front mount mounts line up pretty good if you flip the mounts. I speak from experience. It doesn't vibrate that bad. Mine had a balanced crank in it. It was an '85 frame - 87 & up is a little different but should be just as easy.

You'll want a good suspension to back up the power of the motor.