[YZ3]

I changed the oil and I noticed when I run the bike hard or on the highway oil will trickle out of the oil cap down the crankcase cover (which I sprayed black and replaced). I only put about 1/4 more oil than the manual said so that the level gauge was a bit over midway point.

Is there too much oil in there or is something else going on?

 

[JSS829]

check the gasket on the oil filler cap...theres a rubber gasket on there that probably broke off

 

[BroChaos]

when mine wasn't tight enough, oil sprayed out when i was at high rpms. i just tightened the cap more and it's been fine.

 

[YZ3]

check the gasket on the oil filler cap...theres a rubber gasket on there that probably broke off

Yup, I changed crankcases with one I painted black so that rubber thingy was probably left behind on the old one.

Thanks man.

 

[troy45]

Mine used to weep very slightly even when new - tried adding a shim to make sure the o-ring was compressed before the outer edge of the cap tighened against the casing but in the end I found a fatter o-ring to cure it.

 

[teamstinkin]

its cracked lol...sorry!

 

[YZ3]

Mine used to weep very slightly even when new - tried adding a shim to make sure the o-ring was compressed before the outer edge of the cap tighened against the casing but in the end I found a fatter o-ring to cure it.

Ok, so I went out and bought a new OEM O-ring and the fuxing thing still leaks (much less now) a little bit of oil out the side of the oil cap. What do I need to resolve this? God forbid some flings on the rear tire while making a sharp right turn.

 

[cbrmikeymikes]

damn a lil grease around the seal to help seal it and make shes tight, lol...anyway or u could try a fatter o-ring

 

[YZ3]

damn a lil grease around the seal to help seal it and make shes tight, lol...anyway or u could try a fatter o-ring

It's defenitely tight as can be... simply because if I try to turn it any further I'll break something.

 

[nc600rr39]

something doesnt sound right. if you have the o ring in there and its tight as hell then no oil should be coming out. like cbrmikeymikes said you could try a fatter o ring and tighten it down a lot to make sure it's sealed. let us know if you get it fixed and how you did it.

 

[liljoec]

is it possible that the oil is not actually coming out of the filler hole?
I had a problem with my oil pressure switch leaking. sort of in the same area.

 

[troy45]

I think the problem can be with the shape of the sealing surface of the cap - the o-ring sits in a groove, and the outer edge of this can bottom out on the casing before the o-ring is compressed enough to seal properly. So you get the cap tight but it still doesn't seal fully. Like mentioned above I'm using a fatter o-ring with mine and it's OK now.

Surprising little quality niggle for a Honda, not the only one I've had either.

 

[fasterfortheMaster]

you prolly already checked maybe it's cross threaded

 

[600rr Rider]

Their is a point to where you can over tighten the oil fill cap and pinch the o-ring. You shouldn't have to tighten it down to much.

 

[frontslope]

i was always told to run your finger over the ring of the filter with a little of the new oil before you put it on and only snug it with your hand

 

[nc600rr39]

yea thats what i've always done to make sure that the o ring is "sealed"

 

[Coronacbr600rr]

Someone ever got this fix

 

[dannoxyz]

Pretty sure one of these will fix it.