aluminum framed gasgas
 

just put my 03 ec300 engine in a cr250 chassis, ill get some more pics as its almost done hopefully it will be the ultimate woods bike

Nice work. I was also toying with the idea of puting a 300 in a 98 cr chassis but I'm to busy.As it is you may end up with the ultimate or worst handling dirt bike, hard to say. Its much more involved than people think when you factor in weight bias, cg and engine location unless you can exactly mimic the stock gassers attributes, good luck all the same, let us know of your progress.

im hoping it will work good, as the gasser motor and the cr engine are almost identical in length and width, there was very little fabrication involved just relocated the motor mounts and i had to cut and reposition the left side lower radiator hose barb as i used the cr radiators. The pipe even fit all i had to do was cut the rear mount off and weld it back where the cr mount is, ill get some more pics tonite

What year and model cr chassis are you using?

01 cr250 frame and im using an 07 air box and plastic

Intriguing, what is it you hope to accomplish? Do you prefer the rigidity of aluminum? The handling of the CR? Suspension? Cool project, take lot's of pictures.

all i really want to accomplish was to have a nice light chassis with a sweet woods motor in it. I could have set up the Cr engine but it will never be as smooth as the gasgas engine so i figured why bother i'll combine the two and have the best of both worlds. I also just like building cool stuff .

heres a few more

I'm curious, did you weigh both frames while you had them stripped?

no but the cr weighs 213 lbs and the gasser around 237 lbs im gonna bring it to work this week and weight it on th freight scale, but either way i know it will be lighter then the gas gas