[2LZ]

Regarding knobbies, any inexpensive knobbie should be fine. These bikes don't develop enough power to put a knobbie through the rigors of motocross. My old Husky on the other hand, I had to shop specifically for rubber hardness or pliability for some longevity, balanced with the tracks I'd be riding, at what time of year (soggy or bone dry). The wrong tire and I'd be spinning off huge hunks of knobs or they'd sand down in short order. You won't have that worry with a Hondoid.

No knobbie (IMHO) is worth a damn on pavement but you get used to their limitations.

If you'll be doing tons of mud, just look for the least expensive, "self cleaning" (uh huh) knobbie out there.