91 kx 250 blows smoke and drips alot of unburnt oil out the pipe
91 kx 250 Blows a fair amount of smoke out the pipe and drips a fair amount of unburnt oil out of the pipe connection. I am running 50:1 mix and it still does it. also it uses gas very quickly and fouls at least 1 plug per ridding day. It starts very easy and idles perfect, but often when you crank it it seems to have something holding it back.
Re: 91 kx 250 blows smoke and drips alot of unburnt oil...
Does it have a stock pipe,carb,any modifications! If its stock,I would put a new ring and piston in it,it seems like your getting a lot of blowby,also make sure your air filter is clean. It would help if you used an iridium spark plug.
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Black smoke is fuel. One or more of the fuel injectors could be stuck open and when you shut it off, the fuel drips into the cylinder. When you start it, that extra fuel burns and blows out black smoke. Blue smoke is oil and white smoke is antifreeze/water.
I had a look at the video and it looks like steam - to confirm oil will not evaporate but steam will disappear. If it is steam you have a blown head gasket again or a crack in the head, but you definitely seem to be getting water/steam into your crankcase.
Assuming the bike idles smoothly and is not smoking you can pretty well rule out bad valves and piston rings. If the air filter is clean then intake should be okay. Are the valves set properly? Is the decompression lever and valve working properly? I assume there is not mud plugging up the pipe. That pretty much leaves the muffler on the right side having an internal collapse and is restricting the flow of exhaust gases. Remove the mufflers and see if the pressures are equal at the head. If the problem is still there then have the shop do a compression check. It is possible a ring has broken or is frozen in the ring groove. This would let some compression into the gear box and account for the lower exhaust pressure. I hope this helps.
the weakest link from water entering engine is intake manifold losing its torque. their are four water ports right next to valve ports. two in front two at rear of intake manifold. they warp fairly easy.so check before re installing
I don't drive a Ford but I drive an International and white smoke on start up means the engine is too cold to properly burn the fuel. Your black oil or soot is unburnt fuel. You should look at your engine's preheat system for a malfunction.