Howdy, I was wondering if any of you have ever dealt with oil leaking from the pressure feed to the cylinder heads. Ever since I modified my 907, I've not been able to stop the oil from slipping past the o-rings. Tried new o-rings, oversized o-rings, still no luck. I heard from a local Duc shop that Ducati had trouble with some of the early paso cylinders not having the correct depth recess milled into them, but I do know that they didn't leak for the first 15K miles until they were disassembled. Thanks in advance for any assistance.

There's a thread in the 906 forum about oil leaks. Check it out.

Jon is right there is a thread that has a lot of information on it, and I have posted some of my thoughts on it as well. Just a couple of quick comments here, and you can look at the detail on the other thread.
I had my 907 rebuilt by a very good and experienced shop with a national reputation. I had taken the heads off of my bike to fix the o-ring leaks about 5 times my shelf and had two local ducati shops try as well. Only after the engine rebuild did the leaking stop, however not entirely. Rub your hand down there and you will get oil on them. The Ducshop guys told me that there was not a lot of pressure on those passages, oil or the water. I'm starting to believe that it has to do with getting the heads torqued properly and evenly. After all the o-rings are just getting crushed a little and there is nothing else between them and the outside. Trying to get the proper torque on them while the engine is still in the frame is not easy because you have to work around the frame members, you have to use a special wrench that you have to make just to get to the head nuts. Then you need to be able to convert the torque wrench settings based on the angle the torque wrench is to the homemade wrench and the distance from the nut to the attachment point . . . . . and so on. I think when the motor is out of the bike on a bench, the proper torque can be applied making a proper fit of the heads to the cylinders.
du907
by the way, I went to high school in Langdon, North Dakota. Cold!