Oil in airbox

[spldart]

442 Hope that attachment works.

Ok. Gonna check three things this weekend.

Chain tension
Air filter
Compression test.

Bike has between 15 and 16 K miles on it.
Only had bike a couple weeks.

Chain needs adjustment but it and sprockets in good shape.
Haven't done compression test yet.

However.... The air filter check.....

Pulled the filter and it's in great shape but I can see the entire bottom of the
filter box is wet.... So I stick my finger in the box and touch the bottom.
It comes out wet at the tip and a drip of motor oil falls from that tip of finger to
the ground.
Now... I know there is a breather line that pulls 'blow by' actively from the engine
case to the airbox to get consumed by the engine.
And I know this is a 'emission control' that was introduced by the govt on cars
in roughly the late 60's to early 70's.

I recheck the oil level cold... 'oil level the previous owner left it at'
It's a little above the high mark... 1/5 of an inch high of the high mark....

Question is this.
Should I be concerned with oil coated wet air box floor?
Possibly the overfill of the previous owner?

Now I feel more trepidation at the compression test I will do later today or
tomorrow.

Still though. It's a low miles engine and the oil is in good shape......

Thoughts?

[Water Warrior 2]

A bit of oil in the airbox is not a big problem. It happens and there is an easy solution. The airbox has a drain hose for just this situation. You will find a drain hose from the bottom of the airbox that ends hanging down below the frame. Ir is supposed to have a plug in it. Remove the plug, drain excess oil and replace/secure plug.

[spldart]

I did notice the drain hose and the plug in it. Just wanted an experienced opinion. Thank you very much. I'll post compression psi numbers when I get to that test.
8~)

[spldart]

Pulled the plug and I got between 5 and 10 tablespoons of used motor oil dumped out. Quite the puddle.

[jonathan180iq]

Over long periods of time, and having never been drained before, I really wouldn't be shocked to see that much. If someone in the past overfilled the crankcase, most of the excess would have found its way into the airbox, or burned itself out of the exhaust.

Now that it's cleaned out, you can keep an eye on it over the next few thousands miles to see if there is a serious issue or not. I'm betting it's not, though, and that everything is fine.