z900

[stone MOVIE]

hi guys got prob my 75 z900 is leaking oil from crankcase breather all the time got pods on carbys so no air box i got a k&n filter on the breather need help the oil in motor is fine not over full ??????????????

[mick_dundee]

Sounds like a job for Mel or the Gosmeister, there the 2 older bike experts here although there are a few others that know there way around em, me not being one of them.

[h.b.bear]

Leaking or is it actually blowing ?

[Gosling1]

......hi guys got prob my 75 z900 is leaking oil from crankcase breather all the time got pods on carbys so no air box i got a k&n filter on the breather need help the oil in motor is fine not over full ??????????????......

normally this happens when you overfill the oil. Excess oil gets blown up the breather and into the airbox. If you are sure that the oil level is OK, the other cause for this problem is that the crankcase is being pressurised from excess 'blow-by'. The compression rings are rooted on 1 or more cylinsers and combustion chamber pressure is getting past the top rings and into the cases.

You need to do a compression test. Probably best to get a mechanic to do this with the right tools. They will tell you straight up what the issues are.

[smithy5]

I knew a bloke years ago with a similar issue.
Took a while, but we finally worked out that his idea of correct oil fill, was till it seep'd out the filler hole whilst on the side stand

[stone MOVIE]

when i go for a ride and pull up ther is oil all over the top of the case where the breather is i fill the oil standing up level and what it said on the case of how much oil to use It cost more to clean it then running it ha ha thanks guys think it time to get it to the shop and sort it out TAKE THE TRIP

[h.b.bear]

The 750 turbo is the same ,and the perfect level is just under half on the glass ,that seems to solve its problems

[stone MOVIE]

Leaking or is it actually blowing ?

when i go for a ride its all over the top of crank case

[h.b.bear]

may be coming from the head gasket maybe?

[Stuzrx]

Dud rings pressurising the cases sounds the most likely if oil level isn't too high.
Personally i'd try h.b.bears oil level fix 1st.Head gasket pretty unlikely with the amount of oil being talked of.Have agood look anyway...to satisfy yourself if nothing else.

Good luck.

[stone MOVIE]

Dud rings pressurising the cases sounds the most likely if oil level isn't too high.
Personally i'd try h.b.bears oil level fix 1st.Head gasket pretty unlikely with the amount of oil being talked of.Have agood look anyway...to satisfy yourself if nothing else.

Good luck.

cheer guys ill drop the oil level see how i go its not the head gasket 100% crankcase breather just a pain cleaning it all the time i ride it every day ppl say im mad but i look after it still looks good for a 36year old bike