An alternative method to renew the throttle lever seal on a Bavaria 33 (2006) and other models, which does not require removal of throttle lever. Use neoprene roll, 8mm x 8mm, available from a well-known global website (£6.49 / 1.5 metres). Remove the old silicon first and clean with methylated spirit. Form a circle around the lever with the neoprene, and cut to approximate size. Check the final size of the circle and ‘mark’ and then make a final cut of the neoprene.
Note: it’s easier to join the neoprene at right angles with superglue. This will create a point in the neoprene circle, which you rotate to face downwards, out of sight. Fix the neoprene circle in place with sealant or an adhesive of your choice (or both).