Maintenance & Technical > KX250 / KX125

new kaw in the stable...oil from the exhaust?

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MadKaw:
got this bike today..99 kx250, all stock-and I mean NOTHING is done to it. still looks like it just about rolled out of the showroom. stock pipe and everything. the guy bought it to ride with his sons and they were way faster than him. so he pretty much didn't ride it much at all.it runs really good, but it won't idle. I figure it needs a carb cleaning. the thing is that I changed the plug, and the oil in the tranny. it seems the guy had been using atf in the tranny, and maybe he was using too much. I took it out for a little ride after I changed the plug and oil, and there was oil dripping out of the exhaust pipe and quite a bit of it. enough to make the back brake slime up and not work. the oil coming out smells like burnt atf. I'm worried there might be a bad seal between the tranny and crankcase. really hope not though, since that means you have to split the cases right? but then he may have just been running a rich gas/oil mix. need some input here....HELP!

going to be cleaning out the silencer and pipe on Wed. :? :? :?

hughes:
Nice looking 250. Sounds like the engine needs to come out and split the cases. It's not that bad of a job but I would use the right tool to spread the cases apart not screw drivers.

eprovenzano:
Before you go too far, what is your mix ratio.  I run 50:1 in my 99 250.  I'd give her a few more rides with proper mix ratio while watching the tranny level before you pull the engine.  Check the silencer packing, it most likely needs replaced.  Give her a few rides, while watching the fluid levels, your problem was most likely an incorrect fuel mix ratio.

The 99 250 is a good reliable bike.  Mine has never disappointed me.

MadKaw:
thanx for the reply guys, I hope it has just been running the wrong ratio. cause splitting the cases sounds like a huge pain in the @$$. the thing that bothered me the most is that when it got hot and that oil in the pipe got to smokin, it smelled like burnt atf. left a real bad feelin in my gut after I just brought it home. she runs real sweet though(just won't idle) and the thing looks brand new. even the paint on the frame, underneath the bike, everything. I know the packing in the muffler is soaked, how exactly do you get that opened up to get the crap outa there?

scared of pulling the engine out...splitting cases,,,arggghhh!!!  thems fightin words :x :x :-P

hughes:
Do you have a shop manual for the bike?? Their is a test for pressure testing the crank case, kind of like a leakdown test, might need to remove the flywheel cover and flywheel to expose the crank seal and remove clutch basket from other side to expose the crank seal, soapy water spray onto the seal area check for bubbles.

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