Honda TRX500FA6 AT Owner's Manual page 183

Throttle Inspection
Refer to Safety Precautions on page 125.
1. Check that the throttle assembly is positioned properly and the
securing bolts are tight.
2. Check for smooth operation of the throttle lever from fully open
to fully closed in all steering positions. If there is a problem, see
your dealer.
3. Inspect the condition of the throttle cable from the throttle lever
down to the throttle body. If the cable is kinked or chafed, have
it replaced.
4. Check the throttle cable for tension or stress in all steering
positions.
5. Lubricate the throttle cable with a commercially available cable
lubricant to prevent premature wear and corrosion.
Throttle
Servicing Your Honda 173