I have a 1999 Ninja 250 and oil is slowly leaking out somewhere. I just got the bike several days ago and today I had the chance to work on it a bit. There was gunk all over the bottom of where the oil drain is so I sprayed some WD40 and used a tooth brush to clean it all off. Once it looked brand new, I rode it for 20 miles. Once I got back, oil was leaking onto the left pipe that lead from the exhaust into the engine area (don't know what those are called) and began steaming. I checked out the bottom of the bike again and saw oil everywhere again along the left side. I'm new to street bikes, if its anything like my dirt bikes I've worked on I'm guessing maybe a gasket to replace? If it was something smaller I don't see how oil is getting in all the places it is high and low. please I'm open to any suggestions! thanks
Well this is in the wrong section so it'll probably get moved. Clean the bike off, get it to operating temp (don't ride just let it idle) and LOOK for it. If you want to make it a little easier get a thing of baby powder and put some on the motor. It'll highlight where it is getting wet.
My guess is that it's leaking from where I've circled. You can see that there is a tube sandwiched by two copper gaskets, which is tightened by the bolt just above it. Just get a wrench in there and tighten it up a bit (righty-tighty, lefty-loosey). I don't know the correct torque value off the top of my head. You may need to replace the crush gaskets (they're cheap).
Let us know when you find out more exactly where the leak is coming from.
I cleaned it up real good, dried it up with a towl, then did the baby powder technique which kind of worked. cleaned it off again, dried, then just ran it and watched for 10 minutes. It seeps out from that wide area..right above the Generator Cove Gasket #11060. AliasCT and my dad who works on bikes told me there shouldn't be any oil on that side of the engine.. suggestions? thanks!
Well the only thing to do at this point is crack open that cover and see whats underneath. That's the alternator side, which means it *will* be a pain. You need a pulley puller (I bought a 6" one, but I've used some that were fabricated (and ironically *much* easier to use than the one I bought)) to take off the pulley and look at the metal oil line underneath. You *can* check the line without pulling they alternator rotor, but you can't fix the oil line if you don't. If it is leaking from there, grab a $.50 o-ring (from the dealer) and replace the seal. The water pump is on this side as well, and if I remember right there is an o-ring on this that can also leak oil.
I had a leak here as well, replacing the o-rings on the internal oil line fixed the issue. What kind of concerns me is that the oil is leaking from the *top* of the cover; If anything, I would think it should leak from the bottom, and not even then if the gasket was any good.
Cracked gasket right from where I circled. I took apart the coolant hoses, took off the chain cover, and then finally pulled off the alternator cover. scraped the bad gasket off, put on the new one.. new oil, new filter.. perfect. thanks guys for all your help!