That reminds me, for the reasonably low amount of use I have done on ,mine -way back when- I never had the cover on, even though I have two but never any nuts. Also I intended to ask as the later models don't run a cover, what use is it anyway, and am tossing up whether to bother with it??
The only thing I can think of is to prohibit any clutch swarf contaminating the oil bath, just means to change it regular ??
Cheers