Author Topic: Dutch 500AF Conversion 250KXF 2009  (Read 52274 times)

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Offline Jos197AF

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Dutch 500AF Conversion 250KXF 2009
« on: March 24, 2014, 01:36:51 AM »
Hello,

My name is Jos, I'm 25 years old and I'm from the Netherlands. The last months I've been building myself a KX5AF, starting with a 1991 KX500 engine, bought on Ebay coming from California USA. I also bought a KXF 250 frame, complete without the KXF engine, exhaust, carburetor and electrical items.
The project isn't done yet, but the exhaust and the bikes graphis are the last items which need attention. But we are building on that.
I like to post some photo's and information of this conversion, so I can hear some positive/negative opinions of you guys.

Starting with the 1991 engine:


The 2009 KXF250 rolling chassis:


I want to make the clutch cover divisible, so I cut the carter in pieces:


Developing an answer with SolidWorks to this problem:


Developing a new chain protector:


Developing a new Y part (red parts into existing frame):


Starting cut the frame down:


Making myself some new pieces with a waterjet cutter:


Making the clutch cover:



Making the chain protector:


Insert the Ypart:




Building a new brake pedal:


Making a adaptor for holding the head of the cilinder:




Cut new radiators completely down, and built some new one (I used two new right KXF250 radiators because of the available space):




Bought new pegs, and new Factory wheels:


Making the subframe fit a new Pro Circuit 304 silencer, and bought a new Acerbis Xseat:



A hard piece to create, building a Carbon airboot (there is a silicon hose between the carburetor and the airboot):


And it fits perfectly:



Now we are building a handmade exhaust, and we are also developing an awesome set of stickers for the graphics of my bike. If there is some progress, I will post some pictures!

Greetings from the Netherlands!
« Last Edit: March 24, 2014, 10:00:32 AM by Jos197AF »

Offline sandblaster

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #1 on: March 24, 2014, 03:32:51 AM »
Hello Jos and welcome to the forum.
I would love to see the pics but they are all blank.
I believe that you may have the security settings on the photo's set for private viewing only.
If you change the settings to Public I believe that we can all see them.
Thanks!
SB
The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline Jos197AF

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #2 on: March 24, 2014, 03:35:53 AM »
Hello Jos and welcome to the forum.
I would love to see the pics but they are all blank.
I believe that you may have the security settings on the photo's set for private viewing only.
If you change the settings to Public I believe that we can all see them.
Thanks!
SB

Hi SB,

I will try to fix that! Without pictures this thread is worthless!

Offline sandblaster

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #3 on: March 24, 2014, 03:43:44 AM »
It's not worthless... we just have to use our imagination :-D
The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline mxaniac

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #4 on: March 24, 2014, 04:18:43 AM »
Without doing more research I can't be positive but I suspect welded 7075 is a big mistake because of stress corroision cracking. 

Offline Jos197AF

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #5 on: March 24, 2014, 05:07:08 AM »
Without doing more research I can't be positive but I suspect welded 7075 is a big mistake because of stress corroision cracking. 

I've done some research before i have chosen for 7075 t6. Its possible,  but there is a risk of cracking (Heat). We have done it before, it ages by time (strenght will be better by time after welding).
Wait for the pictures.

Offline mxaniac

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #6 on: March 24, 2014, 06:12:14 AM »
SCC is indepenent of although likely exacerbated by welding.

Without doing more research I can't be positive but I suspect welded 7075 is a big mistake because of stress corroision cracking. 

I've done some research before i have chosen for 7075 t6. Its possible,  but there is a risk of cracking (Heat). We have done it before, it ages by time (strenght will be better by time after welding).
Wait for the pictures.

Offline Dutch-K5 Fan

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #7 on: March 24, 2014, 08:06:54 AM »
He Jos197AF, I have been looking at Motor forum.nl. Nice looking clutchcover.

Hope to see more of the build here.


Dutchie
Proud owner of a KX500AF

Offline motopunk

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #8 on: March 24, 2014, 08:42:01 AM »
He Jos197AF, I have been looking at Motor forum.nl. Nice looking clutchcover.

Hope to see more of the build here.


Dutchie

hey dutchie ..would you post a link, where we could find it there directly on the other website?
want to see the pics to his interesting descriptions...  :-D

hey jos.. welcome to kx-riders and greatings from germany..  8-)
big 2 stroke bikes are weapons for real men, who don´t fear death or devil. ;O)
´83 kx250, ´87 kx250 (with 360 big bore), 87 kx500, ´93 kx500 sfc

---  www.der-motopunk.de.tl  ---

Offline Dutch-K5 Fan

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Proud owner of a KX500AF

Offline Jos197AF

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #10 on: March 24, 2014, 10:01:25 AM »
Hi guys, I make the pictures work again!  :-D


Offline Foxx4Beaver

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #11 on: March 24, 2014, 10:13:01 AM »
Hi guys, I make the pictures work again!  :-D



wow...that is just awesome!!!!
brake pedal, air boot...excellent work...
I wouldn't expect that GEO-MAX 11 to last very long. 
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline Jos197AF

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #12 on: March 24, 2014, 10:22:16 AM »
Hi guys, I make the pictures work again!  :-D



wow...that is just awesome!!!!
brake pedal, air boot...excellent work...
I wouldn't expect that GEO-MAX 11 to last very long. 

Thnx mate!

Offline jBernard

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #13 on: March 24, 2014, 10:34:01 AM »
im going to try and do a CF subframe like the twin air version (just hopefully i wont spend 2K like theirs cost). and that airboot looks awesome!
post some pics of the process if you have any. also how are you sealing the silicone to the cf airboot correctly?
awesome job. very impressive and nice access to a waterjet.
'09 KX500AF - never ending project
'14 KTM 300SX

Offline Jos197AF

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Re: Dutch 500AF Conversion 250KXF 2009
« Reply #14 on: March 24, 2014, 10:56:01 AM »
im going to try and do a CF subframe like the twin air version (just hopefully i wont spend 2K like theirs cost). and that airboot looks awesome!
post some pics of the process if you have any. also how are you sealing the silicone to the cf airboot correctly?
awesome job. very impressive and nice access to a waterjet.

I'm sorry, I don't have any pics of the process making the carbon airboot. But it takes me more than 50 hours to make it perfect.

A little preview of the exhaust of my project, its going to look just like this: