Oil spots on the floor.

[Karfreek]

I have some oil spots on the floor and it looks like it's coming from this tube. Any thoughts?

 

Jay

[M61A1MECH]

Crank case is or has been over filled, those vent tubes come from the air box, the crankcase vents into the air box so the fumes will be pulled into the crabs and burnt with the fuel, if the fume get to a point where they collect inside the air box and stick to the walls they condense back into oil and then drip out of the tubes.

Make sure when you check the oil level the bike is level and the level is just below the mark.

If you pull the air box and wipe out all the oil residue the spots on the floor will stop appearing after a while.

 

Happens to these bikes all the time.

[Karfreek]

Thanks! I'll start with the oil level and go from there.

 

 

Jay

[V7Goose]

May simply be normal. While the answer above is absolutely correct, the real key is just how much dripping you see. If it is only the occasional one or two drops, this is absolutely normal, especially for any 2nd gen that has been ridden fast and long. Normal crank case venting will always contain some oil vapor, and after enough miles and hours, this will condense out and slowly work its way out the vent drains. Don't worry about oil level too high unless there is no air bubble visible in the sight window when the bike is standing straight up.

 

And if the engine ever was overfilled, but is not now, the effect of dripping oil will linger for a long time. The check valves in the tubes make that slow draining even worse over the long run, since any excess oil that collects in the air plenums cannot easily drain completely out.

Goose