Yamaha YZ450F, Owner'S Service Manual

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GEN
INFO
STARTING AND BREAK-IN
STARTING A WARM ENGINE
Do not operate the cold starter knob and throt-
tle. Pull the hot starter lever
1
and start the
engine by kicking the kick starter forcefully with
a firm stroke.
As soon as the engine starts, release the hot
starter lever to close the air passage.
Restarting an engine after a fall
Pull the hot starter lever and start the engine.
As soon as the engine starts, release the hot
starter lever to close the air passage.
The engine fails to start
Pull the hot starter lever all the way out and
while holding the lever, kick the kick starter 10
to 20 times to clear the engine.
Then, restart the engine.
Refer to “Restarting an engine after a fall”.
* Operate the throttle grip before kick starting.
CAUTION:
Observe the following break-in procedures
during initial operation to ensure optimum
performance and avoid engine damage.
Throttle
grip oper-
ation*
Cold
starter
knob
Hot
starter
lever
Starting a cold engine
Air temperature = less than
5 °C (41 °F)
Open 3
or 4 times
ON OFF
Air temperature = more
than 5 °C (41 °F)
None ON OFF
Air temperature (normal tem-
perature) = between 5 °C
(41 °F) and 25 °C (77 °F)
None ON/OFF OFF
Air temperature = more
than 25 °C (77 °F)
None OFF OFF
Starting an engine after a long
period of time
None ON OFF
Restarting a warm engine None OFF ON
Restarting an engine after a fall None OFF ON