cr 500 engine in cr 250r 2003 frame

[Chamberz33]

gday guys

i just bought a 1994 cr 500.
i want to put it into a 2003 cr250r frame, any tips, what would be best way to go about it ?
what do i need ??
any special welding, cutting and chopping of frame, any spacers to be used in the swingarm?

this is my first time doing it.
any suggestions would be great

cheers

[Roostius_Maximus]

buy the allballs swingarm bearing kit for the 2003 cr125, the sleeves are correct spacing and the whole kit is the same price as oem sleeves.
Have a look for builds by Pstoffers, or Algava. Theres lots of older links with pictures of how to do it.

[maddog1927]

you will get 101 opinions.

Mine is Algava style.

http://cr500riders.com/cgi/yabb/YaBB.pl ... 913934/0#0

I did a 125 convert. Major PITA.

Helping a friend with an algava smooth sailing.

[Roostius_Maximus]

I leave the rails intact, I stretch the chassis like PStoffers



I machined blocks with a flange and an angle that matches the stock tube's twist. Then warm it up and squeak it foreward. In the first pic you can see a stock frame in the foreground.

[Chamberz33]

does stretching it cause any stress or cracks ??

im not sure atm the moment what frame im gunna use. whats a good frame to use ?? with easy fitment.
ill use a frame from 2000 to 2005 whatever i get my hands on.

how much am i looking at spending on this build ??

im just keen to build it.

cheers guys

[Roostius_Maximus]

2002+ cr250

[coley13]

hey roostius, whats with that bend in the Y in the frame at the back ? is that after the bending? also looks like you cut the hole in the underside of they Y before bending ? does that make it a bit less stressful to bend ?

[Roostius_Maximus]

yes and yes, check the weld on the Y for how much it moved

[coley13]

yes and yes, check the weld on the Y for how much it moved

cool