This is a brand new Duro tire specially selected by Kitaco Co. in Osaka, Japan.
It fits Honda Z50 Monkey and Gorilla.
Semi slick model for performance engines.
Size is 120/70x8" and it is designed for rear wheel.
Here are some technical informations from manufacturer:

DESCRIPTION
HIGH GRIP TIRE FOR 8' WHEEL FOR SPORT RUN.
○WITH USING TUBE TOGETHER, TUBE WHEEL IS ALSO USEABLE.
※USING TIRE CHANGERS RECOMMENDED.

REMARKS
○HIGH GRIP TYPE
○SOLD EACH
○TIRE SIZE:120/70-8/44L
○O.D.:372 ±7 mm (REFERENCE)
○TREAD WIDTH:118 ± 2 mm(REFERENCE)
○RECOMMENDED AIR PRESSURE圧
 WEIGHT 70kg=100~125kpa(1.00~1.25kgf/cm2)
※ACCORDING TO VEHICLE INDIVISUAL ERROR, CHAIN MIGHT INTERFERE.
※STOCK CHAIN COVER NOT USEABLE

APPLICATION
●FOR FOLLOWING WHEEL
 KITACO 3.50-8' ALUMINUM WHEEL
 KITACO 2.50-8' ALUMINUM CAST WHEEL
 KITACO 3.50-8 ALUMINUM CAST WHEEL
※2.50-8' ALUMINUM WHEEL NOT USEABL
※OTHER MANUFACTURER'S WHEELS MIGHT NOT BE USEABLE.
※合わせTIRE TUBE IS REQUIRED FOR ALUMINUM WHEEL.
※FOR REAR TIRE. FOR FRONT, STOCK FRONT FORK & 2.50 ALUMINUM WHEEL REQUIRED.