ET: Engine (Twin) Oil Leak

[Bill Thomas]

If you ever take the chaincase off,
As Greg says, Make sure the kick start hole is blocked off, I think a Wine cork does a good job !,
Then you can have a Drink, You will need it .

P.S. I wonder if you can look through the Chaincase filler hole and see if the hole is blocked,
Most are after all these years.

 

[nigsey]

I would just try and ride it for a bit, A Twin clutch is not something you want to get involved with,
If it's OK now,
Some of us have been 50 years trying to get the clutch really good !.
But it's up to you. Cheers Bill.

Thank you Bill.

 

[nigsey]

Just one more thought from me on this then I’ll park it. I used Castrol Classic XL 20/50 in the primary case, the same as I’ve put in the engine. Wondering if this is what caused oil to pour out of the gearbox due to increased pressures in the case. Perhaps I should have used a 30 grade as is recommended.

 

[Bill Thomas]

I don't think it would upset it, It just things that happen to Vincent's,
One of my Bikes wants to leak, Which is why I put the breather pipe on it,
I had the pipe on it years ago, But one day I thought it looked a bit bad !!,
So took it off !!, Should have left it how it was, That's what I mean when I say if it's OK leave it alone !.
and the other Bike is fine , Strange.

 

[nigsey]

I don't think it would upset it, It just things that happen to Vincent's,
One of my Bikes wants to leak, Which is why I put the breather pipe on it,
I had the pipe on it years ago, But one day I thought it looked a bit bad !!,
So took it off !!, Should have left it how it was, That's what I mean when I say if it's OK leave it alone !.
and the other Bike is fine , Strange.

Thanks Bill, ever helpful and reassuring.

 

[Chris Launders]

I have a small subtle breather out of the dynamo sprocket cover, the cover is drilled almost parallel to the face in from the bottom right corned area and a piece of 1/8th copper pipe Araldited in ending at about the centre of the cover but not touching anything, it exits under the footrest spacer with a slim rubber pipe down behind the rear footrest plate and is virtually unseen. I fitted this an mine was obviously pressurising the primary side.

 

[Cyborg]

 

[nigsey]

View attachment 40773

Many thanks for sending the photo, it’s a neat job you’ve made of that and certainly something I will consider doing. Took the bike out this morning and fortunately no repeat (so far) of the oil leaking out.

 

[vibrac]

Interesting you have not sprung a leak from the dynamo junction

 

[Bill Thomas]

Nigel, When you pulled the primary case away a nats, To drain the oil,
Did you first loosen the Primary chain ?,
Because the tension blade pivot is slotted half in the outer case and half in the Crank case,
You may have had enough to get the oil out, But just check the chain tension,
You don't want the chain too tight, It can upset the clutch.
Cheers bill.