Valve Lifter Lever removal - 1946 16M

[Hayden1946]

Does anyone know how to remove the valve lifter lever from the crankcase? It's a 1946 16M and the lever was completely seized, with some heat it now moves slightly but ideally I would like to remove it.
Any help would be greatly appreciated.

[SPRIDDLER]

If you look at the illustration of it on page 11 in your Spares List you'll see that there's nothing holding it in the c/case except its external return spring. If it was completely seized I suspect it's been standing a long while and there may be corrosion on the internal part of the shaft, although it should have been oily when in place.
Your Spares List is here:

http://archives.jampot.dk/book/Spares_l ... ingles.pdf