OWNER’S MANUAL
2015
MASTERFOX 125cc
14
THROTTLE CONTROL
Inspection
Check free play. Free play is the amount the throttle control will move before starting to open the throttle
on the carburetor. Free play should be between 5/64 and 5/32-inch (2.0mm to 4.0mm) movement at the
grip. Adjust, if necessary, to bring free play within the specified rang using the following instructions.
Adjustment
Slide the rubber dust cover off of and away from the locknut.
Loosen the locknut on the throttle cable mechanism.
Turn the adjuster to reduce or increase throttle free play.
Tighten the lock nut. Return the dust cover to its normal position.
After making the necessary adjustments, check the throttle grip to ensure it rotates smoothly from
fully closed to open at any steering (handlebar) position.
*Engine Idle Speed
The engine must be at normal operating temperature in order to make accurate idle speed
adjustments. Ten-minutes of stop-and-go riding should be sufficient. Do not attempt to
compensate for faults in other systems by adjusting idle speed.
Warm up the engine, shift into neutral and rest the Masterfox securely on its side stand.
Connect a tachometer, following the tachometer manufacturer’s instructions.
Adjust the idle speed using the throttle stop screw (arrow). Idle speed should be 1400 rpm,
plus/minus 100 rpm.
