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Twins / Re: BSA A50 1962 CLUTCH STICKING
« on: 08 December, 2018, 19:49:15 »
The oil for the primary chaincase should be a 20W50 mineral oil; the same oil that you use for the forks.
I spent a lot of time getting my A65 clutch to operate properly and, assuming there's little or no difference in principle between that and an A65 clutch, suggest you place all the clutch plates into a bath of clean petrol, leave them there overnight, then remove them and wipe the petrol off with some clean linen and allow the rest to evaporate. That done, wipe the bonded plates very lightly with fresh 20W50 - too much and they'll stick to the driven plates, which should be left dry. You want them so that they'll slide freely when you apply the clutch lever. Replace the plates and don't over-tension the springs. The clutch nuts on my bike sit proud of the bolt heads, making application of the clutch lever much easier.
I've had no clutch problems since. Best of luck.
I spent a lot of time getting my A65 clutch to operate properly and, assuming there's little or no difference in principle between that and an A65 clutch, suggest you place all the clutch plates into a bath of clean petrol, leave them there overnight, then remove them and wipe the petrol off with some clean linen and allow the rest to evaporate. That done, wipe the bonded plates very lightly with fresh 20W50 - too much and they'll stick to the driven plates, which should be left dry. You want them so that they'll slide freely when you apply the clutch lever. Replace the plates and don't over-tension the springs. The clutch nuts on my bike sit proud of the bolt heads, making application of the clutch lever much easier.
I've had no clutch problems since. Best of luck.