oil leak under airfilter casing?

THis is the second time I had this happen.I was told it is due to a clogged airfilter.So I cleaned the sucker and everything, using a k& n air filter cleaner.Let her sit for afew weeks cause I was using my other bike.Took her out yesterday and gave her a good riding.The bike ran so nice I buried the needle afew times.I got on her today took her about 5 blocks and I see the drip again.It is right under the airfilter casing.IT is a slight drip.The first time it happen it poured out.any suggestions?Thanks

 

I meant to type in ther ethat it isn't a slight drip.

 

Pull the air cleaner and check-out how much oil the crankcase vent is allowing to get sucked-up in there. If it's really excessive -- it drains out to prevent getting sucked-in with the intake air.

Look for any evidence that it's draining with the bike in motion. Oil covered parts on the bike behind the drain in the airbox.

Pull-off the hose and make sure that the vent hole and hose aren't clogged-up.

Do a compression check to see if you are getting blow-by. (Worn-out rings allowing gasses to escape into the crankcase during the power stroke)

Switch to 20W-50 oil if you are running anything lighter.

 

Since the oil can get in from the crakcase breather tube I would also check to see if the oil is not overfilled. And if so I would then make sure it is not overfilled due to fuel leaking in from a bad petcock. I fit is high then remove the oil filler cap and smell for fuel.

 

Remove the crank breather hose , start it up [hot already] and a few revs and idle to see how much vapor is being emitted if alot from the vent= blowby past the rings.

how much k's the motor done? comp test?

oil too thin/too full?

 

Going to have to leave this wait for another day or two.I started a new job today for a divison of fed ex.Hopefully get to it tomorrow.looks like some good tips.I think I will drain the oil tomorrow and change the oil filter.This way at least i will know how much oil is in it.And reclean the filter.

 

So I did the oil draining,changed oil filter.Seems I cant rember how the oil filter casing goes on?Do the vents go horizontal or vertical?There seems to be little tabs on it so I am wondering which way it goes?

 

It's nice to have them lined-up vertically. You can read the lettering better, that way.

It's flat with an O-ring seal. I doubt you could put it on and not have it seal.

Nobody's going to stop you and say: "Ok, buddy ... let's see your wrenching license ... looks like you have that Oil Filter cover on there off- kilter!"

 

It goes on with the cooling fins vertical. The top of the filter casing has a tab that fits between two other tabs on the engine case. This keeps the case from spinning as you tighten/loosen it. Although Yamaha designed it so that the case has to be halfway on before the filter tab engages the engine tabs. So with the spring pushing it out yu have to keep pushing against the spring for a while.
Another good thing to know is that the Fram replacement filter comes with replacement orings also. The Hi-Flo & Parts Unlimited filters do not.

 

ccol thanks

 

Fram filter: 5-Bucks Comes with $27.50 worth of O-rings.

Don't anybody blow this deal by telling Fram that they are giving-away money with their Yamaha Oil Filters!!!

 

Rick.

Do you have a link for the Fram filters, all I can find on their website are car parts.

Mick Faighaigh.