Honda CH80 2006 Owner's Manual page 205

Quick Reference
Tires
Tire Pressure
(cold)
Spark Plug
Fuse
Quick Reference
Front: 3.50-10 51J
BRIDGESTONE ML2
DUNLOP K398
IRC 3R
KIK MB3
Rear:
3.50-10 51J
BRIDGESTONE ML2
DUNLOP K398
IRC 3R
KIK MB3
Type: bias-ply, tube
22 psi (150 kPa , 1.50 kgf/cm )
Front:
25 psi (175 kPa , 1.75 kgf/cm )
Rear:
with less than 200 lbs (90 kg) of added weight
33 psi (225 kPa , 2.25 kgf/cm )
with more than 200 lbs (90 kg) of added weight
standard: CR7HS (NGK)
CR6HS (NGK)
cold climate:
high speed riding:
main: 10A
or U22FSR-U (DENSO)
U20FSR-U (DENSO)
or
CR8HS (NGK)
or
U24FSR-U (DENSO)