Maintenance & Technical > KX250 / KX125

1989 kx125 restoration master thread

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queen of spodes:
I owned an 85 and 86 kx125.. 89 is a different motor and carb so jetting will be a little different.     

Googling around this morning and it looks like this is the Jetting Bible:
http://dirtrider.net/forums3/threads/carb-tuning-canadian-daves-kdx.184671/

this is a little info in spooge:
http://motocrosshideout.com/2-stroke-dirt-bike-pre-mix-101/

I'm sure MXA did a full write up on jetting/spooge recently but I can't find the issue.

queen of spodes:
Long story short, I had some bad gas.  I went ahead and moved my clip up to the 4th spot and kept the 150 main and 52 pilot.   Also threw on an old Pro Circuit pipe.. bike barks now.   Hope to get some better video soon. 

queen of spodes:
Got the new clutch perch cover installed today:


and took apart the front caliper to find that the lower piston area was filled with gunk.   Dropped it in the ultrasonic, cleaned it up with brake cleaner then rebuilt using a Motion Pro kit:







finally received my two new brake rotors.   The ones on the bike were badly worn and slightly warped:


new front rotor:


queen of spodes:


sandblaster:
Nice job on the brakes.
Next to the suspension bearings it's one of the most ignored areas on bikes.... and yet.... they are so critical  :mrgreen:

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