OPERATION AND IMPORTANT RIDING POINTS
6-3
6
EAU41504
En
g
ine
b
reak-in
WARNING
EWA10322
Failure to properly maintain the vehi-
cle or performin
g
maintenance ac-
tivities incorrectly may increase
your risk of injury or
d
eath
d
urin
g
service or while usin
g
the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha
d
ealer perform
service.
1. Before starting the engine, fill the
fuel tank with a break-in oil-fuel
mixture as follows.
2. Start and warm up the engine.
Check the operation of the con-
trols and the engine stop button.
(See page 4-1.)
3. Operate the motorcycle in the
lower gears at moderate throttle
openings for five to eight minutes.
Stop the engine and check the
spark plug condition (see page
7-8); it will show a rich condition
during break-in.
4. Allow the engine to cool. Restart
the engine and operate the motor-
cycle as in the step above for five
minutes. Then, very briefly shift to
the higher gears and check the
full-throttle response. Stop the en-
gine and check the spark plug.
5. After again allowing the engine to
cool, restart and run the motorcy-
cle for five more minutes. Full
throttle and the higher gears may
be used, but sustained full-throttle
operation should be avoided.
Stop the engine and check the
spark plug again.
6. Allow the engine to cool, remove
the cylinder head and cylinder,
and inspect the piston and cylin-
der. Remove any high spots on
the piston with #600-grit wet
sandpaper. Clean all components
and carefully reassemble the cyl-
inder head and cylinder.
7. Drain the break-in oil-fuel mixture
from the fuel tank and refill with
the specified mix. (See page 4-3.)
8. Start the engine and check the op-
eration of the motorcycle through-
out its entire operating range.
Stop the engine and check the
spark plug condition. Restart the
motorcycle and ride it for about 10
to 15 more minutes. The motorcy-
cle will now be ready to ride nor-
mally.
After the engine break-in period, thor-
oughly check the motorcycle for loose
parts, oil leakage and any other prob-
lems. Be sure to inspect and make ad-
justments thoroughly, especially cable
and drive chain slack and loose
spokes. In addition, check all fittings
and fasteners for looseness, and tight-
en if necessary.
NOTICE
ECA15561
When any of the followin
g
parts
have
b
een replace
d
, they must
b
e
b
roken in.
Cylin
d
er or crankshaft:
A
b
out one hour of
b
reak-in op-
eration is necessary.
Piston, rin
g
s or transmission
g
ears:
Recommen
d
e
d
2-stroke en
g
ine oil:
See page 9-1.
Mixin
g
ratio (
g
asoline to oil):
15:1
U1SN82E0.book Page 3 Friday, June 7, 2013 3:51 PM
