<-=- Club Bevel Heaven -=->

I'm getting oil coming out behind the drive sprocket. There doesn't appear to be a seal on this shaft just some threads on the outside of the sprocket that seem to be for directing the oil back into the engine. Any advice? Thanks

Has it just suddenly started doing it? has the bike been stood for a while?

Most likely cause is excessive crankcase pressure.

Easiest fix is take the sprocket off and refit with plenty of silicone on the splines.

It's been out of operation for a year +. I bought it and did a cosmetic restoration on it after checking it out mechanically and running it but not long enough for it to show the leak. It has a new oversize piston in good shape and it doesn't seem to have any restriction on the breather. I'll try the silicone on the spline. Thanks

Do try the compression though, if it has been stood for some time there is a chance that the rings might be stuck.

Chris

you are correct that there is no seal . there should be a sealed bearing
at the outputshaft . a lot of times a zz type bearing is fitted that is with
a metal shield doing the sealing . a 2RS type bearing would be better
it has a rubber shield on both sides .
unfortionally you have to split the crankcase to replace this bearing
would be a good thing to clean the sludgetrap in the crank flywheel and
check if there is no sludge in the bigendpin .
a lot of bigend assemblys died because lack of oil due to plugged oilholes
in the bigendpin

Regards Eldert

Hi Eldert, Reading through old service articles they reccomend removing head and barrel to clean out flywheel trap, is this a practical method??.

Hi Bob

not really , Ducati used a slotted screw for the sludgetrap so you have to
use a impact screwdriver to remove and install
it would have been easyer if they used a plug with a inside hexagon then
you could remove the plug with a allen wrench

Regards Eldert

relevance-sludge traps have little to do with countershaft sprockets-this sounds like an interesting new thread-please elaborate

i too would be interested in info on sludge traps;my motor is a twin but you seem to have knowledge about all ducatis
i am putting a 750 motor back together and was unaware of these traps.
any info would be good-perhaps we transfer to a twins area?
ta jads

Hi Jads
yes a twin has sludge traps to . Richard Kennedy aka Richo Roundcase
has a very nice site about the restoration of his 750 GT
if you click on this link you see the sludge trap in the lh flywheel

http://people.aapt.net.au/~arkay/ducati/Crankshaft.html

Eldert

thanks -very informative.looks like a big/wide screwdriver would be needed.would you loctite these in after cleaning?-when cleaning,what stops rubbish going into big end
allen key screw is obvious-does no one make these
thanks jads

Eldert wrote:who the hell made you moderator ? i am just answering a question
i am not the one polluting this forum with 4 plus messages a day of witch
90 % is plain a bullshit .
this is a forum for people that love Ducati singles and twins
if you have to much time on hands find a nice BS forum

Eldert

no i have a personality unlike you

+1 on that.i'd rather hear a bit of personal stuff ,than just robotic answers and links to other sites-we're on the net you know

+2-if you bother to read those posts you'll see 90 % BS is only your opinion-others may think that of yours-its all relative-life is to short to be so serious