Maintenance & Technical > KX500 Steel Frame Conversion (SFC)

Looking for input on stuffing a 500 into a 95 kx250 frame

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Goat:
Should I use the 250 or the 500 swingarm? Pros and cons of both would be great. It will mainly be my woods bike but knowing me it will see the dunes as well :-P I like my bikes to sit up kinda high as I'm 6'3" I also like to jump anything I can so the higher the better susp. travel.

BDI:
the best thing i can tell anyone doing this is to start with a whole bike. the reason people prt bikes out is they are worth far more in parts. so if you try to part one together it will cost you far more then buying one and selling what you dont need. as for drilling the cases goes you need to get over that. there is not one part of the bike that does not have to be modded in some way to pull this off. As for welding I would find a junk frame to practice on it, frames are super easy to blow holes in. I used a mig to weld mine so it would look factory. You better have your heat and wire speed set right, close wont cut it on this.

don46:
Not sure the swingarm is the same between the 250 and 500, I do know the 02 250 isn't the same as the 500. I think I would keep everything the same if using a 95 250 then use 95 parts.

Goat:
I paid $100 for the frame and almost an entire bottom end of the 250 engine. The guy was hurting for money so he was selling all kinds of stuff. I can sell the engine parts and get what I need. I'm also working a lot now so money isn't really an issue. Just trying to put money into my truck, k5 and the 250 build.

I ended up getting a subframe off ebay for $9 and a front hub for $9.50 from the same guy. Just 2 bolt holes striped on the subframe. No biggie.

I do have a spare k5 frame, subframe, and swingarm laying around. Wasn't sure if I wanted to build that into a supermoto or use the swingarm for the 250. That's why I was asking which would be better to use.

If anyone is interested in some cash to make me some bushings for the swinarm pivot bolt let me know. My friends dad sold his shop so now I don't have a place to make them.

BDI:
I guess everyone has their own way of doing things. Some people will drive strait down the street to the store and some people will drive all the way around the neighborhood to get to the store. I guess as long as you get to the store that what really counts.

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