Bennche Bighorn 400 Owner's Manual page 159

8-59 Periodic Maintenance and Adjustment
Table5: Solution of Common Problems in Engine System
S/N Problems
Power or performance is
1
falling.
2 Popping noise in engine.
Engine is difficult to start
3
at low temperatures.
4 Coolant boils.
5 Engine cannot start.
1. Check and clean the core of air cleaner.
2. Check muffler for partly blocked and clean spark arrestor.
1. Check air cleaner and admission line for leaks.
2. Check the connection joint of exhaust pipe with engine or
muffler for leaks.
3. Check the grade of gasoline to see if it's too low.
1. Check if the battery voltage goes down when the
temperature goes down.
2. If the temperature is under -18℃, place the vehicle in
warmer place for starting.
1. Check cooling fan of radiator for blockage by soil or dirt.
2. Check the speed sensor of radiator for damage and Check
the fan for failure.
3. Check if antifreeze meets the requirements stated in the
owners manual
1. Check the battery. A low battery can cause motor not to
star or run poorly
2. Check the starting motor for damage.
3. Check if the spark plug is fouled or burned.
4. Check if the air cleaner is blocked.
Solutions