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6-3
Engine break-in
There is never a more important period in the life of
your vehicle than the period between zero and
20 hours.
For this reason, we ask that you read the following
material carefully. Because the engine is brand
new, you must not put an excessive load on it for
the first several hours of operation. During the first
20 hours, the various parts in the engine wear and
polish themselves to achieve the correct operating
clearances.
During this period, prolonged full-throttle operation
or any condition that might result in excessive en-
gine heating must be avoided. However, momen-
tary (2–3 seconds maximum) full-throttle operation
under load does not harm the engine.
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8-75
The air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated
more often if the vehicle is operated in extremely
dusty areas. Each time air filter element mainte-
nance is performed, check the air inlet to the air fil-
ter case for obstructions. Check the air filter
element rubber joint to the throttle body and mani-
fold fittings for an airtight seal. Tighten all fittings
securely to avoid the possibility of unfiltered air en-
tering the engine.NOTICE
Never operate the engine with the air filter ele-
ment removed. This will allow unfiltered air to
enter, causing rapid engine wear and possible
engine damage. Additionally, operation with-
out the air filter element will affect the fuel in-
jection system with subsequent poor
performance and possible engine overheating.
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8-154
Engine overheating
Wait for the engine to cool before removing the radiator cap. WARNING! If the engine is not cool when
removing the radiator cap, hot fluid and steam could blow out under pressure and burn you. Place
a thick rag over the cap and remove the cap slowly to allow any remaining pressure to escape.
If it is difficult to get the recommended coolant, tap water can be used temporarily, provided that it is
changed to the recommended coolant as soon as possible.Wait until the
engine has cooled.
Check the coolant level in the
coolant reservoir and/or radiator.
Level is OK.Level is low, check the
cooling system for leakage.
No
leakage.Leakage.
Ask a Yamaha dealer to inspect
and repair the cooling system.Add coolant. (See the text below.)
Restart the engine. If the engine overheats again, ask a
Yamaha dealer to inspect and/or repair the cooling system.
EE.book Page 154 Monday, October 8, 2007 4:48 PM
