Honda CHF50 2008 Owner's Manual page 181

Specifications
Power Transmission
primary reduction
final reduction
Chassis & Suspension
caster
trail
tire size, front
tire size, rear
tire type
tire pressure, front
(cold)
tire pressure, rear
(cold)
Electrical
battery
generator
172
Technical Information
V-Belt
12.115
26°30'
2.8 in (72 mm)
90/90-10 50J IRC MB65
90/90-10 50J IRC MB65
bias-ply, tubeless
18 psi (125 kPa , 1.25 kgf/cm )
29 psi (200 kPa , 2.00 kgf/cm )
12V-6 Ah
0.19 kW/5,000 rpm