If you have a knobby front (or semi-knobbie) you do not need high pressures. I have run 22psi on front for 15 years of dual sport riding over every type of terrain and on tar, and it always gets the best grip both on and off road and best tyre life. High pressures on a knobbie tyre will just wear the middle of teh tyre quicker and will result in a rougher ride.
I run 22psi front, 24 psi rear using Dunlop D606's and its perfect with gear or without. I may run 26 in the rear and 24 front if it was super loaded with gear. I run the same with Dunlop 605's.
Knobby (or tyres with many blocks of tread) wiggle around alot and generate heat. But a more road like tyre wont generate that extra heat because it has less friction with the road - hence quieter.
That being said, if your tyre looks like a road tyre (eg 80% road) then by all means I would run more pressure. But given the low weight of the kle I still would'nt run any more than 24-26psi on the front.
A good idea is to check the tyre manufacturers website as they often refer to what the tyre was designed for normal operating pressure - but they are not always right as they maybe referring to heavier bikes.
Hope it helps
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