Thanks for all the info

The spec plate has the same numbers as the ones stamped on the right hand side of the fork body under the engine cowl.

You say that the fork was an Australian model but the plate says it was made in Brazil!

I have to say that it may be old but there are no oil leaks, except from the sump plug. It flies from one side of the warehouse to the other and has pretty good torque carrying 6 barrels of wine, each 400L, up a moderate incline.

You mentioned that the bell housing has a tendency to fill with oil. What is the reason for this? Is there a seal that breaks? Pressure differential pushing oil in?

The engine blows no smoke and leaks no oil and only has 8500 hours on the clock.......just run in!

Thanks for all the insights.