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Author Topic: How well do you like your KX250F/K5 conversion  (Read 64309 times)

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Offline brooksie

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Re: How well do you like your KX250F/K5 conversion
« Reply #120 on: December 30, 2012, 05:08:35 AM »
I had my frame welded up just before Christmas. I didn't want the front mounts welded to the frame either. I've always thought they looked "half arsed", and a time/cost cutting method. And as mentioned, getting the engine in and out is tricky to say the least.

Tubes were welded into the rails with bolts passing right through from the outside, holding the mounting plate on the inside. The completed job looks "right", in my opinion.
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Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #121 on: December 30, 2012, 05:12:07 AM »
Can you post a pic of what you did?
Thanks!
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline brooksie

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Re: How well do you like your KX250F/K5 conversion
« Reply #122 on: December 30, 2012, 09:32:37 AM »
I thought that request might be coming! lol

The fella doing the work, and I stress it is all his work (I just told him how I'd like it), lives about an hours drive away from me. I have some parts ordered which are not due to arrive for a week or so. But as soon as they do, I'll be dropping them off and take a few pics. If you're not in any rush, might be some help to you.

Cheers
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Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #123 on: December 30, 2012, 09:36:27 AM »
No rush on my end.
I still have a lot to do  :-D
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline brooksie

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Re: How well do you like your KX250F/K5 conversion
« Reply #124 on: December 30, 2012, 09:47:34 AM »
http://www.flickr.com/photos/brooksiebrooks/8326753929/in/photostream/

http://www.flickr.com/photos/brooksiebrooks/8327813190/in/photostream/

Not sure if I'm doing this right. But here are a few pics of the rails and lower mount welded.
« Last Edit: October 12, 2013, 02:48:02 AM by sandblaster »
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Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #125 on: December 30, 2012, 10:58:41 AM »
Flickr makes it a bit harder to post your pics.
Here they are and thanks!




« Last Edit: December 30, 2012, 11:01:36 AM by sandblaster »
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #126 on: January 02, 2013, 10:29:26 AM »
Well, I was heating and bending my tank and managed to burn a hole clean through it  :-o
Oh well, at least I have a better idea how much to try and heat...
Another member spoke of using a 99 kx125/250 petcock valve.
That may work on a 450 conversion but you would gain no advantage on a 250 conversion at least from 06-08.
The trick is bending the petcock valve out away from the head and forward.
So, if anyone has a stock 06-08 kx250f tank, I'm looking for one  :-D
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline stevea100m

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Re: How well do you like your KX250F/K5 conversion
« Reply #127 on: January 02, 2013, 10:49:50 AM »
I was the one who used the 99 125 petcock but mine is a 250f frame with a 250 motor in it
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Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #128 on: January 02, 2013, 11:19:50 AM »
That explains that  :-D
Thanks!
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #129 on: April 04, 2013, 09:02:15 AM »
Just received my 2000 CR250 air box boot today and it is very close to the 98-99 CR250 boot but the 2000 is just a little slimmer and a bit more refined.
So that means I will be using the 2000 boot unless I find something better I like.
The 98-99 boot is on the left and the 2000 is on the right.







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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #130 on: October 10, 2013, 03:32:32 PM »
I made it to the weld shop today.....Engine mounts are in so now I need to start seeing how my rads will fit.... And I need another gas tank...
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #131 on: October 15, 2013, 09:45:37 AM »
Made a trip to the welders last week and got all the mounts welded up.
You can remove and install the engine if you remove the gas tank.













So lets see, I need a coil mount, cdi mount, mod the left radiator, make the spacers, build a engine, clean it all up, and put it together... :roll:
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #132 on: October 17, 2013, 06:43:29 AM »
Quote from: Larry Wiechman on December 06, 2012, 01:02:45 PM
Quote from: sandblaster on December 06, 2012, 12:07:41 PM



 Will the aluminum block capture the head mount so well that engine removal is impossible without removing the head nuts first?

Finally answered this question today...
The engine will come out without removing the head nuts  :-D
I removed all the engine mount bolts.
I removed the rear mounts from the back of the head.
I pulled the swing arm pin out just far enough to release the engine.
I also had to remove the tank.
Other then that it took about 20 seconds to have the engine out on my bench.
With all that being said, I have not tried a complete engine with the side covers and carb on.
I will try that next week when I get my experimental engine...
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline sandblaster

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Re: How well do you like your KX250F/K5 conversion
« Reply #133 on: November 27, 2013, 08:13:02 AM »
Here is the next challenge..
The gas tank hits the head even without the petcock valve.
As shown earlier, I destroyed my last tank so I will be a bit more careful when molding this one ;)



Using a Petcock valve and remote reservoir from a KLX450 will help the problem but it is not a cure all...

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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline Dutch-K5 Fan

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Re: How well do you like your KX250F/K5 conversion
« Reply #134 on: November 28, 2013, 06:49:37 AM »
I think your engine is turned backwords to much Sandblaster.
Mine cylinder is almost hitting the frame, I even used two flat head allenbolts at the small cover above the exhaust.


Dutchie
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Proud owner of a KX500AF
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