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Author Topic: Making 1995 kx250 work in 1998 kx250 frame  (Read 527 times)
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Egossett87
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« on: July 01, 2017, 06:35:44 AM »

Hello, this is my first post so take it easy on me. I apologize in advance if this has been covered before. Ok; so I started building a kx 250 with just a frame. The frame is a 1998 kx250. And I've been ordering all my parts for a 98. Most everything has been smooth until I ordered my swingarm. The motor I have is from a 1995 kx 250. So when I went to put my swingarm on the motor casing is way to thick to fit the 98 swingarm on. I figured I would have to use a 1995 swingarm to attach properly but wanted to get some more input before I buy another one and it not work as well. Any input would be great! Thanks in advance!

Eddie
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KXDINO
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« Reply #1 on: July 01, 2017, 01:15:52 PM »

are you talking about the width of the back of the engine, if so how much difference are you talking about? if it to much to machine off , i would use a 95 part.
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Egossett87
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« Reply #2 on: July 01, 2017, 02:54:55 PM »

About a 1/4 to 1/2 inch off each side. But I really don't want to cut into the motor cases. So was wondering if the 95 swingarm would work right and also if I went with the 95 swingarm if I would have to use other 95 parts such as the linkage, shock and rear wheel. Or if I can still use all the 98 parts with the 95 swingarm
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Egossett87
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« Reply #3 on: July 06, 2017, 12:44:00 PM »

Anyone? So without cutting into anything Will I need to run a 1995 swingarm to fit the 1995 motor? That's what it looks like to me but would like some other opinions. And if I do run the 1995 swingarm; is the rim a different width? Can the 98 rear shock and linkage work on a 95 swingarm or will that stuff have to be 95 too? I know the brake caliper bracket is different. Wanting to order the correct parts ASAP and give it some life 🤘😝🤘
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umberto
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« Reply #4 on: July 06, 2017, 01:03:21 PM »

I'm guessing that you don't already have the 95 swingarm, or you wouldn't be asking if it will work.  Have you considered cutting your 98 swingarm down?  I had to cut mine down to fit the 500 in my 03 250 frame.  I cut mine with bandsaw (although I have seen people use woodworking saws with a carbide blade) a little large and then use a belt sander to fine tune the fit.  I just put the motor in the frame with the swingarm bolt and motor mounts installed, measured what I needed on each side and then repeatedly test fit the swingarm as I sanded until it fit.  It took me about an hour total.  You will need to put new bearings in the swingarm, and to cut down the races.  For the races, I put tape on the until they would sit flat in the cut off saw and then cut them.  If you don't put the tape, they won't sit flat or cut straight.

If you still want to try the 95 swingarm, I would just buy a cheap one and give it a try.  You may be the first person to try this, and can educate the rest of us of if it works or not.  Worst case you could always re-sell it on eBay.
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Egossett87
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« Reply #5 on: July 07, 2017, 01:02:51 PM »

Ok, so I ordered a 1995 swingarm this morning. When it gets here I'm gonna see if will fit the motor casing. If it does I'm gonna take measurements on it and the 95. If they are all the same the 1998  linkage and shock should work. And like I said. I just started with a frame 5 months ago and have been picking up parts from time to time. But I will keep you guys posted. Hopefully I'll get it right and help another rider down the road who's doing this as well
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