It should be the case drain. If the engine becomes flooded with water, pull the cable (and the spark plugs) and turn over the engine. The water will be pumped out. I think.
10w30 synthetic would be the best you can use.
Yes u can because ive put a 91 crank into a 92 case.
it says on your crank case it will say something like 798cm almost a quart
It does not have a crank case sensor.It does not have a crank case sensor.
If it's a 4 stroke there is no mixing oil and gas. the olny oil is in the crank case
on top of the crank case towards the outside , it vents into the carb by vacume.
The type of oil that is used in a 1991 Kawasaki KX250, 2 stroke, in the bottom half of the crank case is called gear oil. The best form of this oil is 80-90W Gear Oil made by Standard Oil.
there is no crank case drain plug on your engine, only a plugged drain line coming from your oil tank.
replaced crank case valve location at valve cover
There is no oil in the crank case,,you use mixed gas and oil that's what lubes the crank bearings and piston rings.
as the pistons go up and down, and the temperature changes the air in a crank case has to go somewhere. that is what the vent is for
either your neutral safety switsh is bad or your connections are bad or the slow burn fuse on the positive cable has blown(that is the big round thing on the positive cable) the cable will need to be replaced if that is the case. this can be determined by using a test probe behind the fuse and seeing if you have power. if not then that is the problem.