Honda TRX420FA 2009 Owner's Manual page 222

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)
Technical Information
214
front
rear
1st
2nd
3rd
4th
5th
reverse
3 °
0.3 in (8 mm)
AT24 × 8-12
AT24 × 10-11
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
★★ MAXXIS M977
★★ MAXXIS M978