Here's a question that I've never been able to fully resolve :- Why did BS deem it unecessary to fit a gasket between the crankcase side and the left hand inner cover ?
Obviously it doesn't have to contain oil like the right side cover but it is important to keep dust out of the carb chambers. BS fitted gaskets to both outer carb covers and the air filter box.
The crankcase faces are fully machined so should be dead flat, the inner face of a used spare left inner cover I have, appears to be linished (machine sandpapered) so may not be dead flat, making a gasket even more important.
Am I missing something, what do others think ? Should I make a gasket or use sealant? Brian.