Periodic maintenance
53
bile. Continuing to operate the engine un-
der such conditions could cause severe
engine damage.
ESU12010
Cooling system
The coolant level should be checked before
each ride. In addition, the cooling system
must be bled of air at the intervals specified in
the periodic maintenance and lubrication
chart.
WARNING
EWS00380
Do not remove the coolant reservoir cap
when the engine is hot. Scalding hot fluid
and steam may be blown out under pres-
sure, which could cause serious injury.
When the engine has cooled, place a thick
rag or towel over the coolant reservoir
cap, and slowly rotate the cap counter-
clockwise to the detent. This procedure al-
lows any residual pressure to escape.
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
To check the coolant level
1.
Remove the top cover. (See page 42 for
removal procedures.)
2.
Check the coolant level in the coolant re-
covery tank when the engine is cold. If the
coolant level is below the “COLD LEVEL”
mark, add soft water until it reaches the
“COLD LEVEL” mark. (See the following
section “Replenishing the coolant” for
more details.)
CAUTION:
ECS00490
●
Hard water or salt water is harmful to the
engine parts. You may use boiled or dis-
tilled water, if soft water is not available.
●
Tap water can be used temporarily in an
emergency.
Bleeding the cooling system
The cooling system must be bled of air if the
coolant reservoir becomes empty, if air can be
seen in the cooling system, or if there is a
cooling system leak. Consult a Yamaha deal-
er.
CAUTION:
ECS00500
Operating the engine with an improperly
bled cooling system can cause overheat-
ing and severe engine damage.
1. “COLD LEVEL” mark
U8GD12E0.book Page 53 Tuesday, March 20, 2007 1:04 PM
Summary of Contents for RX10GTAX
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