Yamaha MX775 - GOVERNOR OPERATION; OIL PRESSURE SYSTEM

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TROUBLESHOOTING
OIL PRESSURE SYSTEM
GOVERNOR OPERATION
OIL PRESSURE SYSTEM
If the oil pressure switch fails to operate.
No. Checking steps Possible remedy
1 Check that the governor link operate smoothly. Adjust or replace.
2 Check that the governor spring is stretched. Replace.
3
Check the governor adjustment.
(Refer to “INSTALLING THE THROTTLE BODY ASSEM-
BLY” on page 4-7)
Adjust.
4
Check the governor weight and governor bushing function.
(Refer to “CHECKING THE FLYWEIGHT SHAFT ASSEM-
BLY” on page 3-41)
Adjust or replace.
No. Checking steps Possible remedy
1
Check the fuses.
(Refer to “CHECKING THE FUSES” on page 5-27)
Replace the fuse(s).
2 Check the battery.
• Clean the battery terminals.
• Recharge or replace the battery.
3 Check the main switch. Replace the main switch.
4 Check the engine oil level. Add the oil if it is insufficient.
5 Check the oil filter. Replace the oil filter.
6
Check the oil pressure switch.
(Refer to “CHECKING THE OIL PRESSURE SWITCH” on
page 5-28)
Replace the oil pressure switch.
7
Check the entire oil pressure system’s wiring.
(Refer to “CIRCUIT DIAGRAM” on page 5-1)
Properly connect or repair the oil pres-
sure system’s wiring.
8
Check the oil pump.
(Refer to “CHECKING THE OIL PUMP” on page 3-34)
Replace the oil pump.
9
Check the relief valve.
(Refer to “CHECKING THE RELIEF VALVE” on page 3-35)
Replace the relief valve.
10 Replace the ECU. —