Honda TRX420FA 2009 Owner's Manual page 264

Quick Reference
Tires
Tire Pressure (cold)
Spark Plugs
Coolant
Fuses
Quick Reference
Front: AT24 ×
MAXXIS M977
Rear: AT24 ×
MAXXIS M978
Front: 4.4 psi (30 kPa)
Rear: 4.4 psi (30 kPa)
standard:
BKR5E-11 (NGK)
K16PR-U11 (DENSO)
ethylene glycol antifreeze (silicate-free)
for aluminum engines in 50/50 solution
with Pro Honda HP Coolant or an
equivalent distilled water
main: 30A
shift motor :
other: 15A
PS (Electric Power Steering)
(TRX420FPA only):
8-12 ★★
10-11 ★★
or
30A
× 2, 10A × 2
40A