Bennche Bighorn 400 Owner's Manual page 158

S/N Problems
7 EFI system
Periodic Maintenance and Adjustment
1. Check if the ECU is broken.
2. Check if the nozzle is clogged or the nozzle to the ECU
connection is disconnected.
3. Check if the engine speed signal sensor is broken.
4. Check if the engine speed signal to ECU connection is
disconnected.
5. Check if the inlet pressure/temperature sensor is
damaged or the ECU connection is disconnected.
6. Check if the throttle sensor is damaged or the ECU
connection is disconnected.
7. Check if the Sub-harness (cable) of the electrical injection
is broken.
Solutions
8-58