Yamaha XT660XS Owner's Manual page 51

PERIODIC MAINTENANCE AND MINOR REPAIR
NOTE:
G
The radiator fan is automatically
switched on or off according to the
coolant temperature in the radia-
tor.
G
If the engine overheats, see page
6-38 for further instructions.
To change the coolant
1. Place the vehicle on a level sur-
face and let the engine cool if nec-
essary.
2. Remove the seat and panel B.
(See pages 3-12 and 6-5.)
6
3. Remove cowling B. (See page
6-5.)
4. Place a container under the engine
to collect the used coolant.
5. Loosen the radiator cap retainer
screw.
6. Remove the radiator cap and cool-
ant reservoir cap.
WARNING
Never attempt to remove the radiator
cap when the engine is hot.
EAUM1801
1. Radiator cap
2. Radiator cap retaining screw
3. Radiator cap retainer
4. Coolant reservoir cap
7. Remove the coolant reservoir
bolts, and then turn the coolant
reservoir upside down to empty it.
8. Install the coolant reservoir by
placing it in the original position,
then installing the bolts.
EWA10380
1. Bolt
9. Remove the coolant drain bolt to
1. Coolant drain bolt
10. After the coolant is completely
6-13
drain the cooling system.
drained, thoroughly flush the cool-
ing system with clean tap water.