The BSA A65 only take 140ml of 10w40 engine oil be careful to ensure no more
than this amount is in the clutch case or it will stick the plates together.
Use engine oild for older cars/mororcycles as it does not contain the same
solvents and detergents as modern oils do. If the clutch is locked up this
can mean that the clutch plates are stuck together so put bike in neutral
and pull clutch in and kick it over a few times to separate them before
putting bike into gear or it could prematurely damage/wear the splines/gears
etc. Safest thing to do if he does not want to strip the bike is remove
bottom primary drain plug leave bike on side stand and let it drain. Replace
plug and measure 140ml of new non-detergent mineral engine oil 10w40. Worse
case scenario is that the clutch drum back plate has come lose from woodruff
key and jammed up against cush drive! Fingers crossed its the former and not
the latter. Or if he has put the washer that holds the clutch assembly the
wrong way around, easy mistake, I have done it and that locks the clutch up
too. Washer should have dished side outwards then torque to BSA torque
setting using clutch lock up tool.
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