OWNER’S MANUAL
2015
MASTERFOX 125cc
11
4.
Intermittent short circuit due to damaged wire insulation.
5.
Water or dirt in the fuel system or carburetor.
6.
Fuel system vent is plugged or the fuel line to the carburetor is partially obstructed.
Pre-ignition or Detonation (Knocks or Pings)
1.
Incorrect fuel (not high enough octane rating or blend of additives incorrect for Masterfox engine)
2.
Incorrect spark plug (heat range) for type of usage.
Overheats
1.
Insufficient oil supply or the oil is not circulating properly.
2.
Heavy carbon deposits from “lugging” the engine.
3.
Insufficient air flow over cylinder head from idling too long or obstructed by mud and debris.
Engine Leaks Oil
1.
Loose parts. Check for loose bolts and nuts.
2.
Bad seal(s) and/or gaskets.
Excessive Vibration
1.
Engine mounting bolts loose.
2.
Broken frame. Contact us.
3.
Drive chain and/or sprocket badly worn, or links tight from insufficient lubrication.
4.
Wheel(s) and/or tire(s) damaged.
5.
Masterfox is not properly aligned.
Brakes Do Not Hold Normally
1.
Front or rear master cylinder(s) low on fluid. Check for visible leaks. Add fluid if no leaks found.
2.
Brake line contains air bubbles. Bleed brakes.
3.
Front or rear master cylinder piston worn.
4.
Brake pads contaminated with grease or oil. Replace pads and clean rotors before using.
5.
Brake pads badly worn. Replace.
6.
Brake rotor badly worn or warped. Replace.
7.
Brakes fade because of heat build-up. Excessively hard use of brakes or because brake pads are
dragging.
8. Brake pads drag due to insufficient hand lever free play. Adjust free play
ENGINE OIL
Using the proper oil, plus regularly
checking the oil level, adding additional oil if needed, and changing the
oil as recommended will all help extend the life of your Masterfox’s engine. Remember, the engine in this
Masterfox is cooled by outside air flowing over the engine, and the oil circulating within the engine. Even
the best oil gradually wears out, reducing its lubricity. It also picks up dirt and other contaminants from the
inside of the engine and becomes more and more contaminated as the miles of use add up. Old and/or