Yamaha Vector RS90RX, Owner'S Manual

Page: 57 / 90

Periodic maintenance
51
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 shroud and the right side
cover. (See page 40 for removal proce-
dures.)
2. Check the coolant level in the coolant
reservoir when the engine is cold. If the
coolant level is below the “COLD LEVEL”
mark, add coolant 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.
3. Install the right side cover and the shroud.
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.
Replenishing the coolant
1. Remove the shroud, the right side cover,
and the top cover. (See page 40 for re-
moval procedures.)
2. Remove the coolant reservoir cap and
add coolant until it reaches the “COLD
LEVEL” mark.
1. Coolant reservoir cap
1. “COLD LEVEL” mark
U8GM10E0.book Page 51 Friday, April 27, 2007 6:43 PM