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Author Topic: 2014 KX 250F/KX500 AFC  (Read 38456 times)

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Offline alexander-vmann

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Re: 2014 kx 250/300 AFC
« Reply #15 on: January 26, 2016, 04:39:28 PM »
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KX 500 newbie

my bike: 1993 kx500

Offline tkeen511

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Re: 2014 kx 250/300 AFC
« Reply #16 on: February 04, 2016, 12:56:12 PM »
Gotta love when more parts show up right?  :mrgreen:
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline mikectanker

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Re: 2014 kx 250/300 AFC
« Reply #17 on: August 03, 2016, 03:15:31 AM »
Any progress on the build?
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Offline tkeen511

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Re: 2014 kx 250/300 AFC
« Reply #18 on: August 08, 2016, 10:31:13 AM »
Yeah but not as much as I'd like. I'll post some pics soon
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline pre-mixed

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Re: 2014 kx 250/300 AFC
« Reply #19 on: December 05, 2016, 09:30:04 AM »
Quote from: tkeen511 on January 17, 2016, 03:13:39 PM
Well I have very slowly been making some progress on the build. Been taking the engine apart on the 2 stroke motor, planning on sending it to sand blaster for some vapor blasting. Also thanks to jbernard I got some sweet frame rails and yoke, so far it looks like everything will fit pretty nicely. I got some cutting done today but it's about -8 F here right now, so I was working in the basement and the compressor didn't have enough juice to power the air tools to cut out the welds, so I'm gonna wait till it warms up a little to work in the garage and get these welds cut out and start doing some tacking.



where did you get those good looking frame rails and Y? I am looking at a 2013 KX250f and thinking about putting a 14 KTM 300 motor in it...
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Offline umberto

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Re: 2014 kx 250/300 AFC
« Reply #20 on: December 05, 2016, 10:09:55 AM »
Those rails were made by jbernard, who is doing the really awesome 500AF conversion on this site.  He hasn't been on in a while, but I think he may still have some.
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Perhaps I have a dirt bike addiction?

03 KX 250/88 KX 525/2017 KX250F - Goliath
17 KX250F/04 KX250
04 KX 250 - Lunchbox's Bike
05 KX 125/144

Offline pre-mixed

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Re: 2014 kx 250/300 AFC
« Reply #21 on: December 05, 2016, 10:19:41 AM »
Quote from: umberto on December 05, 2016, 10:09:55 AM
Those rails were made by jbernard, who is doing the really awesome 500AF conversion on this site.  He hasn't been on in a while, but I think he may still have some.

Thanks I will try sending him a message
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Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #22 on: September 11, 2017, 12:55:08 PM »
Alright guys sorry I haven't posted in a while, but I haven't made much progress. The project started as a 250 2 stroke conversion, but when I came across a nearby complete kx 500 for $250 I really couldn't say no. I bought the bike, and it's been sitting for almost a year. Been hard to find time and funding for it since I moved across the country, and didn't even have any of it with me, and working in the motorcycle industry doesn't exactly help the funding. So anyways, I finally got around to getting the motor on my bench. Still have some fab work to do to the frame but I figured I'd get this started. As i started tearing into the motor I realized it was a little worse shape than I originally thought. Cylinder walls have a little bit of surface rust, connecting rod is pitting, main shaft has some surface rust, I will see what I will clean up. Seems like photobucket has gone down, so I'll give my best attempt at posting from imgur.
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #23 on: September 11, 2017, 12:58:32 PM »




















« Last Edit: September 11, 2017, 01:43:08 PM by sandblaster »
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline sandblaster

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Re: 2014 KX 250F/KX500 AFC
« Reply #24 on: September 11, 2017, 01:44:12 PM »
I fixed your pics.
If you go back and modify your last post you can see how I fixed the pics so that they show up  8-)
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #25 on: September 12, 2017, 02:12:53 PM »
Split the cases tonight, not exactly what i wanted to see. The previous owner said it was his dads bike and he decided to restore it after his dads passing, until finally giving it up and selling it to me. He said he rebuilt the bottom end, obviously every bike on Craigslist has a new bottom end, I took it with a huge grain of salt and figured I'd split the cases anyways. The main shaft had some surface rust on it but it came off ok with just a little bit of scotch brite, so no worries there. However, the main bearings were trash, the right side main bearing came out with the crank, the connecting rod has aluminum that appeared to be molten at some point, and you can see where it shaved the cases and eventually cracked the left side case. Right side appears to be ok, and thankfully the crack appears to be repairable.
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #26 on: September 12, 2017, 02:23:34 PM »







« Last Edit: September 12, 2017, 02:30:17 PM by tkeen511 »
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #27 on: September 12, 2017, 02:39:41 PM »
Quote from: sandblaster on September 11, 2017, 01:44:12 PM
I fixed your pics.
If you go back and modify your last post you can see how I fixed the pics so that they show up  8-)

Much appreciated. Think I got it figured out now
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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline tkeen511

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Re: 2014 KX 250F/KX500 AFC
« Reply #28 on: September 13, 2017, 02:41:36 PM »
Made some more progress during lunch today. Not a whole lot, but better moving forward a little bit than nothing at all. Cleaned up the sub power valves a little bit and started chipping away some of the carbon build up inside the exhaust port. Have plenty more cleaning to do before i start porting it.

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14 250 sx, 98/14 kx 300 afc, 91 kx 500, 72 s2 350, 11 ktm 250xcw, 10 crf 250x, 97 Montesa 315r, couple other bikes

Offline sandblaster

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Re: 2014 KX 250F/KX500 AFC
« Reply #29 on: September 14, 2017, 02:35:12 AM »
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.
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