i was wondering if anyone has ever takin a yamaha yz 125 or 250 bike engine and put it into a blaster frame or has seen this done? If it is possible i would like to do this because im running a blaster in a quad open class in new york in the district 3 and they dont have any specific classes for different engine sizes and i dont have the money to buy a 450, 250r, or anything along them lines. any info would be nice. Thanks alot

 

80cc motors are usually done in a blaster frame. I realize this is not what you are looking for.
A non counterbalanced motor above 80cc's would shake a blaster frame apart IMO. This is why you don't see CR250/etc. motors used much in quads.
Save up dude. [img]i/expressions/face-icon-small-smile.gif[/img]
250R's are cheap now days. A 14k 250R (3 years ago) is selling for 5-7k now.Surely a quad not built up as much could be had cheaper.

 

I have seen cr500 motors in 250r frames, I have heard that they shake and vibrate the rider to death if it is not done the right way.

 

the only large engine i saw in a bike was a YZ 125 motor in a banshee frame, ( not sure why) but that thing and beefy thick rubber motor mountas that stiffled vibration

 

one guy on here has a blaster with a cr250 engine in it, well, at least he says he does, but i used 2 have a buddy with a 450r in a blaster, and man, it will rattle u like crazy

 

search it on google, there was a guy who put a 250 into a blaster frame for a customer so he could race 250 class.

 

It was in the late 80's i believe and i think dirt-wheels had a write up about it also

 

CRF 450 OR YZ 426 IS THE BEST CHOICE. VERY VERY FAST. IVE GOT A CRF AND I LOVE IT. FASTEST QUAD IVE RIDDEN.