Operation And Important Riding Points; Engine Break-In - Yamaha TTR 125 2020 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

There is never a more important period
in the life of your engine than the first
20 hours of riding. For this reason, you
should read the following material
EWA10272 carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
20 hours of operation. The various
parts in the engine wear and polish
themselves to the correct operating
clearances. During this period, pro-
longed full-throttle operation or any
condition that might result in engine
overheating must be avoided. Howev-
er, momentary full-throttle operation
under load (i.e., two to three seconds
maximum) does not harm the engine.
Each full-throttle acceleration should
be followed with a substantial rest pe-
riod for the engine. To allow the engine
to cool down from the temporary build-
up of heat, cruise at a lower engine
speed.
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0–10 hours
 Avoid prolonged operation above
 After every hour of operation, stop
 Vary the engine speed from time
10–20 hours
 Avoid prolonged operation above
 Rev the engine freely through the
After break-in
Avoid prolonged full-throttle operation.
Vary the engine speed occasionally.
NOTICE
If any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle.
6-1
1/2 throttle.
the engine, and then let it cool for
five to ten minutes.
to time. Do not operate the engine
at one set throttle position.
3/4 throttle.
gears, but do not use full throttle at
any time.
ECA10271