I dont like oil leaks - the KH has a couple of minor ones, one around the oil pump, which I have never been able to stop as I dont wat to overtighten any of the pump unions so I just live with it.

The other one is from the gearbox sprocket oil seal, it leaks because the sleeve that the seal fits over has some pitting on it from rust.

The sleeve is rusted in place and the only way to remove the sleeve and replace it is to strip the motor which I am going to do over the winter.

When I park it on the bike lift after a while there is what looks like a lot of oil on the surface of the lift.

I stuck a small container under the bike just to see how much it is leaking, after a week it amounts to a couple of spots, so I guess it just spreads out on the surface of the table.

In just over 1500 miles I have had to put about 100ml in the box to top it up.

So the leak is nothing like as bad as I thought, but still going to strip the motor over the winter as there is a whine from the box - should have looked at the bearings when I had it all apart - stupid me !

Might see about a bit of port work over the winter as well, had a word with Mick Abbey and for a modest cost it can be improved without making it too peaky.

That's the downside of old bikes, the fettling never ends /