Yamaha BIG BEAR YFM400NN Owner's Manual page 115

10. Warm up the engine for several min-
utes at idle speed. Check for oil leak-
age while warming up.
CAUTION:
If oil leakage is found, stop the engine im-
mediately and check for the cause.
Oil pressure check
1. Put a cloth around the cylinder.
2. Slightly loosen the oil gallery bolt in
the cylinder head.
3. Start the engine and keep it idling until
oil begins to seep from the oil gallery.
If no oil comes out after one minute,
turn the engine off so it will not seize
and find the cause.
4. Start the engine, and then check the oil
pressure.
5. After checking, tighten the oil gallery
bolt to the specified torque.
1. Oil gallery bolt
Tightening torque:
Oil gallery bolt:
7 Nm (0.7 m·kg, 5.1 ft·lb)
CAUTION:
Be sure to check the oil pressure after re-
placing the engine oil.
8-8
2. Cloth