Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > oil breather

[Paul748bp]

i hate the look of the standard oil breather if i change it to a race one will it **** oil out all over my engine ? are they worth changing ????

[NBs996]

I recently read a great article on crankcase breathing but just spent arf hour looking for it with no success.

What d'you mean by 'race' breather? A race breather system will feed to an expansion box fitted on the subframe, and some sort of reed valve at the crankcase.
The dude writing the article was saying that them little cylinder shaped jobbies that sit lonesome on the crankcase are not recommended - they become soaked in oil vapour which then leaks out over the back of the engine/tyre.

If anyone knows the writeup i'm on about and can post a link that'd be fab - it's a step-by-step project of converting a 996 to a proper race breather system.

[keefer]

have a look at the post from Shazaam
http://www.ducatisportingclub.com/showthread.php?t=12030&highlight=crank+case+breath er

[keefer]

PS
I have the race item and it will not put oil out on your bike
but they can be expensive and you may find it hard to get all the plumbing as Ducati corse no longer supply the parts

[Paul748bp]

the arrow points to what i belive is the breather,mine is a big black box ontop of that wrapped in heat shield silver tape yuck !

just behind the resivour for the rear brake pedal

[keefer]

you could go for something like this
http://cgi.ebay.co.uk/Ducati-748-916-996-Oil-Breather-Valve-Anodised-Blue_W0QQitemZ330039551064QQihZ014QQcategoryZ36796 QQrdZ1QQssPageNameZWD1VQQcmdZViewItem
its the same but different if that makes sense ?

[phil_h]

The goal of a race breathing mod is to reduce crankcase pumping losses.
This is usually achieved in one of two ways :
- a much bigger breather pipe than standard
- a reed valve to reduce crankcase pressure
HOWEVER ...
if the engine has one piston in when one piston is out (e.g. a ducati v-twin or an ilf) ... then the pumping losses are not bad.
UNLESS ...
you have leaky rings which will cause a big crankcase pressure problem and blow oil over your engine
SO ...
if your engine is blowing oil ... first sort out the problem, then worry about the after effects.

[phil_h]

Originally Posted by Paul748bp

the arrow points to what i belive is the breather,mine is a big black box ontop of that wrapped in heat shield silver tape yuck !
just behind the resivour for the rear brake pedal

Correct - just make sure you have a reasonable size hole venting the reservoir at the end of the tube.

[Paul748bp]

i had a tricle around mine the day and i get some black sooty build up around it but i been told thats not much to worry bout if there is oil blasted all over ur shock and engine then something has gone
poooooooooooooppp

[NBs996]

Found that article I was on about in my post up-thread, it's from Shazaam on the Oop-North site:
http://www.ducati-upnorth.com/tech/breather.php