Hi Guys

I've got a quick question, my bike is a 2001 with just over 6000km. After a 45min ride today I parked my bike in the driveway and went to work on my wifes bike for about 10min. When I came back to my bike, I noticed oil dripping from one of the hoses down by the kick stand. Where is this oil coming from? the air box? and what do I do to correct this problem. Thanks in advance.:(

to my knowledge,there are 3 hoses going down there;

1 radiator overflow tank tube and 2 gas tank breather tubes.

now there"s a bracket screwed on the cam chain tensioner where some hoses go,but no oil there.

all in all,no oil in either of those tubes.
the airbox tube is going down the crancase.

it may only be some chain lube that gathered there and with some heat is trickling down.
or a shift-shaft seal that"s leaking...

check along the lenght of those tubes to be sure its getting there inside or outside one of the tubes.

If its the same as my 02, one hose is an airbox drain hose, and that is where the oil is coming from. i overfilled the oil on my bike just slightly, and when it sits out on the hot asphalt it leaves a dribble of oil out of the vent hose.
What happens is this:
You get a little oil in the airbox from the crankcase vent(that is where your crankcase vent ends up) It drains out of the airbox via the tube.
You may have a little too much oil in the bike, or you may be getting a little blow by, OR the reeds that control the crankcase vent pressure may not be sealing well. Keep an eye on your oil level, and maybe change the oil for good measure.
it is probably one of those things, i would guess.I highly doubt , however, that it is blowby!!

Dave

I had the same problem. Below the generator cover there are two bolts, these are the main bearing bolts. They have washers on them. Since they are the main bearing bolts you can only tighten then so much. In my case they couldn't be tightened enough to seal the hole. I braught it to the dealer they put some sealer like yamabond or somthing in between the washer and tightened it to spec. bike was under factory warrenty. It hasn't leaked yet. What ever you do, do not just tighten up those bolts. This will tighten up your main bearings and fry them. NOT good. Hope this helps

I've had the same thing happen on my '02. I kind of suspected that the hose came from the airbox, but never checked it out since the amount of oil it was loosing was so small. Funny thing is that I haven't had a single drop of oil come out at home in my garage, but have had it happen several times at work.