Operation And Important Riding Points; Engine Break-In - Yamaha YZ85 2021 Owner's Manual

Operation and important riding points

Read the Owner's Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accident
or injury.
6
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Engine break-in

WARNING
Failure to properly maintain the vehi-
cle or performing maintenance ac-
EWA10272 tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer perform
service.
TIP
Before starting the engine for the first
time, the air filter must be lubricated.
(See page 7-11.)
Engine break-in procedure
1. Fill the fuel tank with a break-in oil-
fuel mixture as follows.
Recommended 2-stroke engine oil:
YAMALUBE 2R
Mixing ratio (gasoline to oil):
15:1
2. Start and warm up the engine.
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3. Operate the motorcycle in the
4. Allow the engine to cool. Restart
5. After again allowing the engine to
6. Allow the engine to cool, remove
6-1
Check the operation of the con-
trols and the engine stop switch.
(See page 4-1.)
lower gears at moderate throttle
openings for 5 to 8 minutes. Stop
the engine and check the spark
plug condition (see page 7-7); it
will show a rich condition during
break-in.
the engine and operate the motor-
cycle as in the step above for 5
minutes. Then, very briefly shift to
the higher gears and check the
full-throttle response. Stop the en-
gine and check the spark plug.
cool, restart and run the motorcy-
cle for 5 more minutes. Full throttle
and the higher gears may be used,
but sustained full-throttle opera-
tion should be avoided. Stop the
engine and check the spark plug
again.
the cylinder head and cylinder,
and inspect the piston and cylin-