I purchased a used 1991 KX 60. The previous owner said the bike ran when parked. I removed/cleaned the carb, put in new plug, replaced all fluids, and tried to 'fire it up'. It would not start after several attempts.

The spark plug was getting really wet with some time of brown water. I drained the new coolant from the hoses, pump area, and radiator. I tried to crank it several times again....took the plug out and each time it was wet with brown water.

I drained the crank case oil, disconnected the carb and cranked it more times...still has brown water in cylinder. I have tried to use a vacuum over the spark plug opening.....still brown water in the cylinder. It seems that the brown water is less....but still there.

There are no fluids in the motor....could the brown water be from the exhaust pipe? How can I dry out that cylinder?

 

Yes it could be from the exhaust. If I was you I would take off the head and check it out, but don't take advice from me.

 

Thx Gravvy.....does anyone else have some words of wisdom?

 

Pulling the exhaust, draining the water out of the jug and the exhaust can be done at the same time easy enough. The vacuum is a good idea if the nozzle was small enough for the spark plug hole. I normally would just verify a leak down test after buying a used dirt bike and buy a pipe plug for future use.