I would adjust that small drive chain so that it has the tight tension removed from it and thus a small amount of play in it and then see how it goes.
Now to re-tension that chain is rather critical as there are two bolts to loosen to slide the the land roll clutch assembly downwards, but take note that the bottom bolt also allows lateral movement of the slide assembly that way both land roll chains can be adjusted in one action. How I do it is not to loosen those two bolts much at all thus you can use a drift and lightly tap the slide downwards but only a millimetre at a time. Don't loosen it so that it drops down by itself, that's the trick to doing this operation without frustration.
Cheers,
BB.
