Oil leaking out of airbox when parked By rosiemoto (Read 298 times)

[rosiemoto]

This has been happening for a while and didn't seem to be too bad, but this morning I came out to a big dried up circle of oil on the ground, and I actually had to top up my engine oil a little (was down to 1/4 on the dipstick)! The "puddle" was located straight below the airbox, and I think the oil on the ground may be coming from that little clear/yellow vent hose that dangles from the airbox (the bottom airbox hose; see pic). Every hose that comes out of the airbox is saturated with oil where it meets. Messing with their hose clamps seemed to temporarily stop the oil leaking out from the hoses before, but now it's just like it's "overflowing" from the airbox. I have the engine oil filled up to the center of the dipstick.

It won't leak to the ground right after a ride; it only does it behind my back when it's been sitting.

Also maybe related - this morning the bike was HARD to start and took a lot of cranking with some throttle. Until today it has been starting perfect since I did my valve adjustment about a month ago. Seems it doesn't want to start cold? Once it was warmed up it would restart no problem like nothing ever happened. Did the valve adjustment pop loose?? But what's with all this oil...

This picture is from it being parked for 1 hour after a ride. I'll add more in a new post when/if I can get more:

[rosiemoto]

FIXED! It wasn't oil on the ground; it was gas, and it was coming of the float bowl drain screw. The screw must've been just loose enough to drip out behind my back. Probably from all the times I've taken the CVT cover on and off. Well after this hard ride I just did it was PEEING right in front of me soon as I parked it, so phew, glad that's all it was!

Though, the oil leaking out from the airbox hoses is still there. Unless tightening this screw fixed it but I doubt it. Anyone know why oil would leak out of those hoses?

[cyborg]

Theres always a bit of oil misting and gathering in the airbox,,, hence the clear drain hose,,, and yep gas will "dry up" but oil will not,,, glad you found it

[rosiemoto]

Thanks, so do you mean it's normal to have oil where the hoses connects to the airbox, cyborg? There's no dripping, and I've never seen the oil visibly moving, but whenever it does have alot of oil, I can see where a little bit has run down the outside of the CVT cover at some point. Nothing to worry about then?

What about needing to top up my oil? I keep checking the dipstick periodically and the oil level has gone down twice since my last oil change. A shop has told me about this a couple years ago, so it's not a new thing... just wondering if it's normal to have to top up a couple times per oil change?

[cyborg]

Crankcase pressures ( pumping pressure) rise when the piston is moving up and down fast,,,,think of the volume of air displaced when the piston is on the downstroke,,,at 7500 rpm the piston goes up and down 125 times a second,,,that's a lot of volume in ccs,moving in and out of an engine