CB500T puking oil out of the breather tube.

Useful Idiot

Useful Idiot

Been Around the Block
Not sure what is causing this, but when I'm going down the road it's puking oil through the breather. It did it again on the way to work this morning. I'm going to put a quart of oil in it and get it home, but I'm stumped on what my be causing this.

Any ideas???


Thanks
 
Hmm....sounds like excessive blowby, but you may want to check the breathers on the head for obstructions. How much do you lose over how much time? Is it a vapor deposit or splashy, oil running off kinda thing?
 
It's a lot. I started happening in a parade last weekend. Lots of stop and go.

Possible the motor got too hot and damaged the rings?
 
It's possible, quickest thing would be to do a compression and leak down test.
Some autoparts stores will rent you the tools if you don't have access on your own.
Doesn't sound good however.....
 
one if not both of your ring sets are farked(broken ring,seized ring) do the compression test as suggested,,,good luck!!
 
I was hoping he'd get lucky if nobody actually mentioned the bad stuff......yer screwed now sparky!
These old pistons are cast from pretty crumbly "aluminum" and it'd be just as possible that he just plain holed a piston, especially if perhaps the bike was running lean and in stop/go parade type traffic......

good time to rebuild......might as well hop it up while you're in there.
 
Too much oil, maybe? Crap in the carbs, overflowed gas into the motor and overfilled the sump? Worth a look first up ;)
 
Think this is the first time the worst case senerio WASNT the case.

The breather tube that runs from the rocker boxes was clogged with this milky type shit. I took my primary cover off and the same stuff was everywhere.

I'm thinking the tube clogged so the motor wasn't breathing right, add the fact that I rode in a St. Paddy's Day parade (lot's of stop and go) and that super thinned the oil and along with the motor not breathing, created this goo stuff.

I've been riding the piss outta this bike for 2 seasons and neglecting the routine stuff....
 
Hot damn! Well, I'm glad your engine isn't pooched.
I do wonder what the "milky substance" is though....love that bike much? HA!
Sounds like you should flush that engine out and go from there. Is it gummy or hardening up?
More like mayonnaise? Could be condensation frothing the oil, but it'd take a lot of condensation.
Beer does a great job of that too.....got some pranksters for buddies?
.
 
Milky....hmmm. Well it does sound like water or some liquid in the oil for sure. Not sure where it would have come from though! ???
 
It's heavy water based. You can rub it between your fingers and water droplets will come out.

Gonna flush it and time it tonight and give it a go.
 
hurley209 said:
What ever happened?im having the same problem
Click to expand...

I was thinking this was you for a sec. just under a different screen name.../ I was thinking "is he that embarrassed?" haha
 
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