oil leak on 916/955

**MarkG** · 04 Apr 08, 11:22 PM

My new to me 955 sp is leaking oil on the left side. It is not the clutch slave cylinder, but there is oil all over that vacinity after a short ride. I re-sealed the tach pick up also. It looks like it coould be coming out from the timing case window. Any ideas or experience here?

**Jimmy996** · 04 Apr 08, 11:32 PM

Quote:

Originally Posted by MarkG

My new to me 955 sp is leaking oil on the left side. It is not the clutch slave cylinder, but there is oil all over that vacinity after a short ride. I re-sealed the tach pick up also. It looks like it coould be coming out from the timing case window. Any ideas or experience here?

Had similar thing, mine was just a little leak, spoke to Mr R he advised it was either my cliutch pushrod o rings or the gearbox output shaft seal.

I changed my pushrod o rings and it was fine!

hope your fix is as simple!!

**MarkG** · 04 Apr 08, 11:41 PM

Jimmy,

Thanks for responding. I should have said in my first post, the clutch cylinder and that area is dry, as is the countershaft. I feel like an idiot because there is oil all around that area, and mostly around the window and down-ward from there. And the outside of the case around the clutch cylinder IS wet with oil. When I pulled off the clutch cylinder the area around it, including the engine side was dry. I pulled off the countershaft cover, and no fresh oil there either. I wish that was it, as you say, an easy fix.

At first I thought the veritcal cylinder base was leaking, but that's dry. I think the air turbulence was slinging oil around enough to get oil in the vicinity.

**brian91cfr** · 05 Apr 08, 12:33 AM

have a look at the front where the alternator wires come out through the gland type fitting
and has the outer end plate got a o-ring fitted the 2x countersunk allen bolts the
black jhp plate. above the blue eng plug for alternator fitting.
or the blank plug just by the window has a aluminium washer on it ?

brian

**MarkG** · 05 Apr 08, 01:03 AM

Thanks Brian, I will check it out tomorrow

**ohlins916sp** · 07 Apr 08, 02:16 AM

Prolonged standup wheelies can result in oil in the airbox

(I suppose more civil activities could too). Pop the tank off and check for oil pooled in the front/bottom of the airbox.

**MarkG** · 07 Apr 08, 04:37 AM

Prolonged stand up wheelies....wish I could. Power lifts a foot or so in second as far as I get.

No oil in the air box though. I think the leak is/was at one of the timing case screws. Cleaned it all off, went for a ride, and oil dribbling from the screw vicinity. Cleaned it again, and the crevice at the bottom of the screw hole was getting damp. So I cleaned it all out squirting alcohol into the screw hole. (Note one does not light up while doing this!). Resealed the screw with hi-temp silicone. Test ride to follow. I just may have gotten off easily here. I also checked the ignition lead wire exits, so far they are dry.

Thanks for the ideas.