Checking The Coolant Level; Checking The Cooling System - Yamaha YFM70RY Service Manual

d. Insert the tailpipe into the muffler and align
the bolt holes.
e. Insert the bolt and tighten it.
Spark arrester bolt
8 Nm (0.8 m·kg, 5.8 ft·lb)
f. Remove the purging bolt "3".
g. Start the engine and rev it up approximately
twenty times while momentarily creating ex-
haust system back pressure by blocking the
end of the muffler with a shop towel.
h. Stop the engine and allow the exhaust pipe to
cool.
i. Install the purging bolt "3" and tighten it.
Purging bolt
27 Nm (2.7 m·kg, 19 ft·lb)
3
L LLL L LLL L L LLL L
EAS21110

CHECKING THE COOLANT LEVEL

1. Place the vehicle on a level surface.
2. Check:
• Coolant level
The coolant level should be between the
maximum level mark "a" and minimum level
mark "b".
Below the minimum level mark → Add the
recommended coolant to the proper level.
L LLL L L LLL L L LLL L
ECA13470
NOTICE
• Adding water instead of coolant lowers the
antifreeze content of the coolant. If water is
used instead of coolant check, and if nec-
essary, correct the antifreeze concentra-
tion of the coolant.
• Use only distilled water. However, if dis-
tilled water is not available, soft water may
be used.
Recommended antifreeze
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Check:
• Coolant level
TIP
Before checking the coolant level, wait a few
minutes until it settles.
EAS21120

CHECKING THE COOLING SYSTEM

1. Remove:
LLL
• Seat
• Front fender
Refer to "GENERAL CHASSIS" on page 4-1.
2. Check:
• Radiator "1"
• Radiator outlet hose "2"
• Radiator inlet hose "3"
• Water pump assembly "4"
• Water jacket inlet joint "5"
• Water jacket outlet hose "6"
Cracks/damage → Replace.
Refer to "RADIATOR" on page 6-1, "THER-
MOSTAT" on page 6-3 and "WATER PUMP"
on page 6-5.
3-17
b
a
High-quality ethylene glycol anti-
freeze containing corrosion in-
hibitors for aluminum engines
Mixing ratio
1:1 (antifreeze:water)
ENGINE