Idle Speed Adjustment; Valve Clearance Adjustment - Yamaha Rhino YXR66FAV Owner's Manual

EVU00810

Idle speed adjustment

NOTE:
_
A diagnostic tachometer must be used for this
procedure.
_
1. Start the engine and warm it up for a few
minutes at approximately 1,000 to
2,000 r/min. Occasionally rev the engine
to 4,000 to 5,000 r/min. The engine is
warm when it quickly responds to the
throttle.
2. Remove the seats. (See page 4-20 for
seat removal and installation procedures.)
3. Remove the console. (See page 8-8 for
console removal and installation proce-
dures.)
4. Connect the tachometer to the spark plug
lead, and then set the idle to the specified
idling speed by adjusting the throttle stop
screw. Turn the screw in direction a to
increase the engine speed, and in direc-
tion b to decrease the engine speed.
Specified idle speed:
1,450–1,550 r/min
1. Throttle stop screw
5. Install the console.
6. Install the seats.
EVU00820

Valve clearance adjustment

The correct valve clearance changes with
use, resulting in improper fuel/air supply or
engine noise. To prevent this, the valve clear-
ance must be adjusted regularly. This adjust-
ment however, should be left to a professional
Yamaha service technician.
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