2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 96Get this manual
MAINTENANCE
WHEELSTIRES
Tire pressure Check the tire pressure with the tire pressure gaugeshould be checked when the tires are cold
V4V5: RECOMMENDED TIRE PRESSURE: Front: Standard: 27.5 kPa (0.275 kgcm2,4.0 psi) Minimum: 23.5 kPa (0.235 kgcm2, 3.4 psi) Maximum: 31.5 kPa (0.315 kgcm2, 4.6 psi) Rear: Standard: 32.5 kPa (0.325 kgcm2, 4.7 psi) Minimum: 28.5 kPa (0.285 kgcm2, 4.1 psi) Maximum: 36.5 kPa (0.365 kgcm2, 5.3 psi) After V5: RECOMMENDED TIRE PRESSURE: Front: Standard: 27.5 kPa (0.275 kgcm2,4.0 psi) Minimum: 25.0 kPa (0.250 kgcm2, 3.6 psi) Maximum: 30.0 kPa (0.300 kgcm2, 4.4 psi) Rear: Standard: 32.5 kPa (0.325 kgcm2,4.7 psi) Minimum: 30.0 kPa (0.300 kgcm2, 4.3 psi) Maximum: 35.0 kPa (0.350 kgcm2, 5.1 psi) Check the tires for cuts, embedded nails, or other damageMeasure the tread depth at the center of the tiresReplace the tires when the tread depth reaches the following limitMINIMUM TREAD DEPTH (Frontrear): 4.0 mm (0.16 in)