Honda TRX420FPA Owner's Manual page 223

Specifications
Power Transmission
primary reduction
secondary reduction
final reduction
transmission ratio
final drive
Chassis & Suspension
caster
trail
tire size, front
tire size, rear
tire pressure, front &
rear (cold)
214 Technical Information
front
rear
1st
2nd
3rd
4th
5th
reverse
3
0.3 in (8 mm)
AT24 8-12 MAXXIS M977
AT24 10-11 MAXXIS M978
4.4 psi (30 kPa)
2.680
1.480
3.231
3.154
3.058
2.157
1.541
1.178
0.848
3.996
shaft