Lemans mk2 throttle grip screws

On the throttle grip.of my lemans mk2 their are 2 screws one a thumb screw and the other with a slot in it
Looking on information on what they exactly do and how to set them up.
Thanks
Neil.

One is for friction, easier or harder pull/return, as I remember. The other? Forgotten - I always fitted the Tommaselli (?) twin pulls, usually because the original equipment was disintegrating or due to disintegrate. Two screws there, too.

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The slotted screw might be to limit travel at WOT. I imagine this prevents yanking on the cable when carbs at WOT, but just a guess.

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