Hi Guys. I'm having problems with oil seeping out of the clutch on my 749 race bike. It's fine when idling but underload it seeps. I'm not 100 % if it's through the push rod or behind the clutch basket so changed all of the seals including the main one on the clutch housing, seal on the primary gear, one on the basket spacer, push rod and thee two embedded seals and the small one it goes through. I've also changed the one behind the main clutch nut top hat. If that doesn't cure it, maybe it's piston ring change time. Last chance before I strip the engine? My question is has anyone used the breather system in the photo attached? They're from Moto Rapidio. I've had issues with the stock breather before.
No, but very interested as I've been using oil on my 999 on TDs. Opened it up today and found oil in the OEM tube that connects to the breather. How much oil do you use?
I was also reading this today, may be of interest to you. I know it's 998 but I believe it's very similar to the 999. http://www.ducati-upnorth.com/tech/breather.php
Thanks for the reply. I'm not using any as I'll get black flagged leaking oil and I don't fancy any on the rear tyre! I've just read that article too! Great article. They're £133.
About 350ml per TD + 200 road mls so roughly 300mls. Last TD was particularly high reviving due to nature of track. Road miles are all "spirited" too. I'm also told Motul is particularly bad for blow by at high revs.
If you are seeping oil through the clutch, why are you changing the breather or thinking the piston rings may be going?
Assuming you changed the oil seal in the output shaft? (clutch end, by the bearing that the pushrod goes through) If so, are you sure you fitted it the correct way round? Because if you fit it backwards, with the 'lip' pointing outwards (it's small so not that easy to see) it may continue leaking oil into the clutch! Don't ask how I know...
The idea is to reduce crank case pressure. The three outlet junction screws into the existing crank case breather. One pipe goes to the normal breather route. One goes to the oil filler cap and the final one becomes the new oil filler.
Interesting. Does this mean even less power loss than the oem system, which is basically retained or not??
