oil leak (please help)

[scottymx9]

Hay guys i have oil leaking out of the black box right in front of the coolant resavior under the rear fender could anyone tell me what would be wrong with my yfz. THANKS

[effective]

Isnt that black box, the airfilter box. Dunno, think it could be your airfilter oil leaking out of the box and shouldnt be a problem i guess.

[mountaineer]

no, it's the little black box that sits in front of your coolant bottle with a hose that goes down to your motor.

[scottymx9]

Thanks mountaineer you are correct.

[intruder]

If you stand it up on end when you clean it that will allow oil to travel up that tube. If not then your getting blow-by and the top end needs rebuilt.

[scottymx9]

Thanks intruder, yes i do stand my quad up when i clean it im sure that is my problem. THANKS

[murrays400ex]

i believe that is your oil overflow. so try changing your oil and putting the right amount in.
peace

[1iviper]

the black box is your crankcase vent.

[ChrisSekerak]

I have a 2005 yfz 450 LE. On the head, the middle section where it looks somewhat white, There are areas that are shades of grey around the one bolt on the clutch side. There is also the similar problem on the other side. Does this mean those areas are under stress or is something else wrong?????

Any help would be great!
chris