Anything greasy and sticky seems to work well.
Any EP2, Lucas Red"N"Tacky, BelRay waterproof all work well.
More important to put a little bit on more often than what you use.
Too much flings about and risks contaminating the clutch.
One match-head size dollop spread around the big gear every tank or two.
The gears will be noisy at first and quiet with time and miles.
These are not nickle/silicon cylinders. The chrome is quite soft and fragile.
I found my cylinder scratched up badly due to the poor original air filter.
The 50:1 synthetic oil mix I was using didn't help much.
I switched to 32:1 to find it sealed the damaged cylinder better.
With a new cylinder I have switched to Maxima 927 castor oil and found great results.
No scratching at all in the cylinder and the hone pattern is still there miles later.
It seals better at 24:1 but still works very well even at 32:1.