I don't know the answer here.
A couple of years ago I put a Mk3 engine together as a 920.
That started with bare cases so I had to buy the timing cover and fixings.
I bought all of that from Rabers just before they closed shop.
It was all NOS.
A week or two after getting the cases on Ebay I managed to buy the original oil pump and crankshaft for the same cases. They had sold earlier to another buyer, but that fell through.
I didn't do anything to the pump other than fit a new external rubber seal.
The 920 engine can sit for 3 months and barely show any drop in oil tank level. For all intents, wet sumping does not occur with that engine.
My Mk3 850 drains down into the sump at a steady rate. If it isn't ridden at least once every two weeks, expect a smokey startup. If it goes much more than a month, the sump needs draining.
Same system, but more miles on the parts, although I'm not sure that it was ever sealed up like the 920 is.
Glen
A couple of years ago I put a Mk3 engine together as a 920.
That started with bare cases so I had to buy the timing cover and fixings.
I bought all of that from Rabers just before they closed shop.
It was all NOS.
A week or two after getting the cases on Ebay I managed to buy the original oil pump and crankshaft for the same cases. They had sold earlier to another buyer, but that fell through.
I didn't do anything to the pump other than fit a new external rubber seal.
The 920 engine can sit for 3 months and barely show any drop in oil tank level. For all intents, wet sumping does not occur with that engine.
My Mk3 850 drains down into the sump at a steady rate. If it isn't ridden at least once every two weeks, expect a smokey startup. If it goes much more than a month, the sump needs draining.
Same system, but more miles on the parts, although I'm not sure that it was ever sealed up like the 920 is.
Glen