Topic: massive oil leak

[freggy]

I replaced the chain of my cb750 and since then i got a massive oil leak which comes in my opinion from the chain oiler.
I removed the sprocked and put an o-ring in the hole of the oiler like someone mentioned on this site and then i turned the oiler like it should be to shut it off.
Nevertheless i still have a massive oil leak as soon as i rev the bike up.First 5km when i ride slowely there's nothing but when i rev it up my rear tire becomes all wet by oil. (see pic)
Does anyone know what i can do about it to shut it completely off?

[MCRider]

I replaced the chain of my cb750 and since then i got a massive oil leak which comes in my opinion from the chain oiler.
I removed the sprocked and put an o-ring in the hole of the oiler like someone mentioned on this site and then i turned the oiler like it should be to shut it off.
Nevertheless i still have a massive oil leak as soon as i rev the bike up.First 5km when i ride slowely there's nothing but when i rev it up my rear tire becomes all wet by oil. (see pic)
Does anyone know what i can do about it to shut it completely off?

There is no pressure behind the oiler, its purely a splash feed affair. So revving the bike up should not contibute much to the oiler effect. Maybe a little.

I'm suspicious that the Oring and the oiler shut off work together, I think its use one or the other. And I don't remember what's supposed to hold the bit of Oring in the hole. Is it just that the sprocket is on top of it? Centrifugal force would be working to dislodge it, but I remember reading about that trick and it sounded secure at the time, just my bad memory.

Anyway, if the oiler didn't puke on your tire before, it shouldn't be worse now. And even at full wide open I've not seen an oiler puke like that.

Is the breather from the back side of your transmission still hooked up to the oil tank? If so...

I prefer the method of running a long bolt or cut off sparkplug into the countershaft to positively block off the oiler hole. Then there can be no question what it is turned off.

[kghost]

+1 on what MC said.....

Check your breather on the back of the engine..

Also theres a seal behind the sprocket...in the case.

I've seen them come loose.

[chrislib]

I had a very similar leak, some of it was the chain oiler but the majority was coming from the breather at the back/bottom of the crankcase. Turns out the little vent hose going to the oil tank had cracked right at the nipple on the case.

[MCRider]

I had a very similar leak, some of it was the chain oiler but the majority was coming from the breather at the back/bottom of the crankcase. Turns out the little vent hose going to the oil tank had cracked right at the nipple on the case.

Yup that's what I was alluding to.

[freggy]

had a few busy weeks but today i had the time to check where the leak was coming from...
you guys were right! a tube from the oil tank was cracked 

Thanks for your help!

[Johnny5]

had a few busy weeks but today i had the time to check where the leak was coming from...
you guys were right! a tube from the oil tank was cracked 

Thanks for your help!

It could be a lot worse than that! And look on the brightside, when you replace the tube, you get a fresh oil change.

[MCRider]

had a few busy weeks but today i had the time to check where the leak was coming from...
you guys were right! a tube from the oil tank was cracked 

Thanks for your help!

Good deal, you'll be like new.

[igraul]

I had a very similar leak, some of it was the chain oiler but the majority was coming from the breather at the back/bottom of the crankcase.

Is there a chance someone has a picture of this they could post. I'm currently in Malibu, and I think I might have this problem.

Thanks!

i