Maintenance & Technical > KX500 Original

Oops The big k5 went down

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Just an old rider:
  Well had a good and bad day saturday ..   We just got back out of the shop the wifes kx 125
   I took it for a couple of spins up and down our road  (Semi Private)  it runs awsome .. and I added a couple of plastics to the 2002 kx ...    :evil:                     

 Now for the bad news  :-(      I got anxious to take the k5 out and get on her  I let it warm up a little les than I usually do and she started smoking a little like she was loading up so I reved her up a little while to blow the smoke out ,,,,,   i then let it idle while i put my helmet on and chest protection  .. engaged the clutch went some 25 feet and she threw on the brakes and never barked again  :-o 
   the kick starter   is froze up so im sure she is dead and gone ... I would like some info on maybe what I did wrong ??? If anything  besides overreving  and also I will  be rebuilding her myself this time..  I am hoping it is just piston seized but that would be best case senario ... thanks alll  .. and Jfab.. I am going to be getting a hold of you for a piston   thanks ron










     

DHregdovic:
Are you positive you had mix fuel in it? Are you sure you shook the container to make sure the 2stroke oil was thoroughly mixed?

Hillclimb#42:
Nice lookin bike, old rider. Looks awesome. My prediction is a cast piston crater'd. Doesn't sound like you do anything too different. You'll know once you see it, probably.

BDI:
What oil are you running? Castor 927 will separate from the gas when it gets cold. If you leave your bike parked with the gas turned on and it gets under 40 the oil separates from the gas filling the float bowl with oil. It will smoke like a big dog when started and then it will clear up leaving you with strait gas in the tank.

Just an old rider:
Just so happens I am running castrol I thought it was a good oil...   I have noticed my fuel shut off valve does not totally shut down also and we have had several days with cold weather ,,,   :-o  I did not know it would do that .. Oh well I guess I am going to take her apart and order a pistion with a window in it  :roll:  I needed to try to rebuild a engine eventually ... last time i did it it was a enduro 175  in high school around 1978   thanks guys ...

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