Kazuma produces more than 30 different models of quad bikes, off-road bikes and ATVs. These are tough machines. However, as with most off-road vehicles, wear and tear inevitably occurs. Any problems that arise are fairly simple to diagnose, whether it is an issue with a rough idle or a dirty air filter. Run through a few troubleshooting steps before calling in a mechanic.
Make sure the tire pressure is the same in all four ATV tires. A tire can easily dislodge from the rim if the pressure gets too low.
Check the oil level in the engine. Pull out the dipstick and wipe it clean before reinserting to check the level. Make sure the oil level is between the two markers on the dipstick. Over-filling or under-filling can damage the engine.
Warm the engine for 3 to 5 minutes before adjusting the carburettor if the engine is idling rough. Turn the ATV off. Twist the mixture screw on the carburettor clockwise until it is fully closed. Turn the engine on. Twist the mixture screw out by two full turns, then adjust the idling screw until the engine idles smoothly. Turn the mixture screw slightly clockwise and counter-clockwise until the maximum engine REVs are reached. Adjust the idling screw again until the engine runs easily.
Check the air filter if the engine is running rough or is difficult to start. Blow the air filter out with compressed air. Replace the filter if necessary. Do not run the engine for more than a few seconds without the air filter installed as dust particles could damage the engine.
Use the spark plug feeler gauge to check that the spark gap is 0.6 to 0.7mm. Remove the plug with a spark plug wrench. Wipe any dirt from the spark plug threads. Always wipe the gasket (seal) clean before reinstalling the plug. Make sure not to over-tighten the plug as this could strip the thread.