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Author Topic: Trans question KX250  (Read 10263 times)

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Offline motopunk

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Re: Trans question KX250
« Reply #15 on: April 07, 2013, 04:56:09 AM »
Quote from: sandblaster on April 07, 2013, 03:43:14 AM
Thanks motopunk!
If anyone needs any parts from me DO NOT buy them from eBay, just shoot me a PM for direct pricing  :-D

 :-D thats good to know... you are great sandblaster  :-D
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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

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Offline shookyd

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Re: Trans question KX250
« Reply #16 on: April 08, 2013, 03:08:42 AM »
I got the 2001(cracked cases) apart and down to splitting the cases on the 1992,  It appears to me that the stator off of the 2001 should work in the 1992 as long as I use the same flywheel.  Biggest issue I see now is diagnosing the problem with the 1992 tranny, but at worst case, I am thinking its the shifter forks which Motopunk has stated wont interchange, might have to buy a set of shifter forks on ebay,  Sandblaster, do you have a set of 1992 KX250 shifter forks?
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Offline sandblaster

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Re: Trans question KX250
« Reply #17 on: April 08, 2013, 03:30:23 AM »
PM sent  :-D
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The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline motopunk

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Re: Trans question KX250
« Reply #18 on: April 08, 2013, 06:04:17 AM »
Quote from: shookyd on April 08, 2013, 03:08:42 AM
I got the 2001(cracked cases) apart and down to splitting the cases on the 1992,  It appears to me that the stator off of the 2001 should work in the 1992 as long as I use the same flywheel.  Biggest issue I see now is diagnosing the problem with the 1992 tranny, but at worst case, I am thinking its the shifter forks which Motopunk has stated wont interchange, might have to buy a set of shifter forks on ebay,  Sandblaster, do you have a set of 1992 KX250 shifter forks?


shookyd, you´re on a right way, but you can also buy a set of cheap cases for the ´01 motor (97-2004 will work ) i think that might be easier  8-)
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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 shookyd

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Re: Trans question KX250
« Reply #19 on: April 10, 2013, 06:17:13 AM »
Just sent my cylinder off to be replated and piston fit to it, ordered bottom end kit and topend gasket kit from ebay. I know this is probably a stupid question but I have never rebuilt an engine. Do the bottom end kits come with the rod already on the crank or is that something I have to install and figure out clearance for the rod bearing?
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Offline motopunk

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Re: Trans question KX250
« Reply #20 on: April 10, 2013, 06:42:36 AM »
Quote from: shookyd on April 10, 2013, 06:17:13 AM
Just sent my cylinder off to be replated and piston fit to it, ordered bottom end kit and topend gasket kit from ebay. I know this is probably a stupid question but I have never rebuilt an engine. Do the bottom end kits come with the rod already on the crank or is that something I have to install and figure out clearance for the rod bearing?

no... this aftermarket-kit comes ready to build in...  i have never seen aftermarket cranks that were sold apart.  8-)


would like to see a pic of your blown cases where the rod hangs out... an which parts of the 92 tranny are damaged? i think you could bring both motors back to life sooner or later... having a backup motor is always a good thing.. :-)
« Last Edit: April 10, 2013, 06:55:21 AM by motopunk »
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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 shookyd

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Re: Trans question KX250
« Reply #21 on: April 10, 2013, 06:52:54 AM »
thanks Motopunk...gotta learn by asking questions. Just glad there is helpful knowledge on this site that is willing to share.
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Offline motopunk

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Re: Trans question KX250
« Reply #22 on: April 10, 2013, 06:58:33 AM »
take questions is always better than making fails...  :mrgreen:
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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 shookyd

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Re: Trans question KX250
« Reply #23 on: April 21, 2013, 12:31:57 PM »
Time for an update.  I got my cases back together.  Still waiting on my cylinder to come back.  I used the entire transmission out of the 2001, including the shifter forks and rods.  I had the 2001 shifter rods machined down to the diameter of the 1992 shifter rods 10.5mm back on the ends so they would fit the 1992 case which also allowed me to use the 2001 shifter forks.  I also had to change the bearing for the output shaft because the 2001 was slightly larger.  Bad news was the gear set lever was very worn and broke when I reinstalled it, got a new one on the way.  Can't wait to crank the throttle on this one.
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