Maintenance & Technical > KX500 Original

Getting started project KX5 in 06 Aluminum frame

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emullen:
Hangtime,

thanks for your reply.  We tried the k5 motor in a RMZ 250F frame today and you are correct about the downtube and exhaust pipe.  We pretty much stopped at that point and decided that we would think it over - if we should attempt any modifications.  I was told that there is someone running a k5 in a rmz 250 frame in FTR ( Florida trail riders) but we will have to further investigate that.  Does your 450 have a single downtube or does it have 2 like the k5 frame.  If you have a picture of the pipe and downframe that you could shoot over we would appreciate it.

Thanks

hangtime:
emullen,
I assumed you were talking about an aluminum 250f frame. I am not sure however about the 250f steel frame. If you check out my gallery you can see most of the mods needed. The photo 12/15 in my gallery you can see just how much was removed, then in photo 11/15 you can see the pieces added to complete the new wishbone.

emullen:
Hangtime-

We had a steel frame available to us.  I would prefer the Aluminum.  I am going to have to find a 450 aluminum frame I think to make it work.  it has the split downtube.  That was the the real factor.  Otherwise it will require heavy modification.

hangtime:
Remember, on the 450f frame you will have to cut out the "split downtube" or "wishbone" and move it up to make room for the 500 head pipe.

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