Results of marking the pulleys and running it.
It appears the clutch pulley reaches it's maximum belt depth, and the variator reaches right at maximum travel about evenly.
On stock exhaust, stock variator and clutch pulleys, no rev limiter (it seems the stock exhaust is the rev limiter), upjet, it seems around 37 mph indicated is about it. Going any faster would take mods to facilitate higher engine rpm (pipe, bbk, carb, airbox). Or final drive gearing changes.
If it had a clutch pulley that allowed the belt to travel to the bottom, the stock variator travel would only facilitate using around 70% of the clutch pulley range, the belt would have to be shortened to allow the stock variator to pull it to the bottom of the clutch pulley, and thus some penalty to the takeoff gearing.
A larger variator with more effective travel would be ideal with a fully unrestricted clutch pulley.
Just my interpretation of it, let me know what you think, and what results you have found.