The best all round tires are:
Bridgestone
ED77 80/100x21 80 mm wide, 80 mm high (100 x 100%)
ED78 120/100x18 120 mm wide, 120 mm high (120 x 100%)
They fit good with the Koubalink KTM8-1. Does not hit the tank.
The front holds in loose gravel better that any tire I have had on any bike.