Yamaha pw80 - Manual (Page 18)

STARTING AND
OPERATION
CAUTION:
Prior to operating the machine, perform
steps listed in pre-operation check list.
A WARNING
Never start your engine or let it run for any
length of time in a closed area. The ex­
haust fumes are poisonous and can cause
loss of consciousness and death within a
short time. Always operate your machine
in an area with adequate ventilation.
STARTING A COLD ENGINE
AWARNING
Before starting the engine, be sure to
shift the transmission into neutral.
1. Turn the fuel cock to "ON".
2. Operate the starter (choke) and complete­
ly close the throttle grip.
3. Slide the "ENGINE STOP" switch to the
"RUN".
4. Kick the kick starter with full strength to
start the engine.
5. After the engine starts, warm up for one
or two minutes. Make sure the starter
(choke) is returned to the original position
before riding.
STARTING A WARM ENGINE
To start a warm engine, refer to the "Starting
a cold engine" section. The starter (choke)
should not be used. The throttle should be
opened slightly.
CAUTION:
See "Break-in Section" prior to operating
engine for the first time.
WARMING UP
To get maximum engine life, always "warm­
up" the engine before starting off. Never ac­
celerate hard with a cold engine! To see
whether or not the engine is warm, see if it
responds to throttle normally with the starter
(choke) turned off.
A WARNING
Before starting off, be sure to turn up or
remove the side stand.
Failure to retract the side stand completely
can result in a serious accident when you
try to turn a corner.
ENGINE BREAK-IN
1. Prior to starting, fill fuel tank with gasoline
and oil tank with specified oil.
2. Allow engine to warm up. Check engine
idling speed. Check operating controls
and engine stop switch operation.
3. Operate machine is lower gears at
moderate throttle setting for 3 — 5 min­
utes. Check spark plug condition.
4.
5.
6
.
7.
8 .
Allow engine to cool. Repeat procedure,
running for 5 minutes. Very briefly, shift
to higher gears and check full throttle
response. Check spark plug condition.
Allow engine to cool. Repeat procedure,
running for 5 minutes. Full throttle and
higher gears may be used, but avoid sus­
tained full throttle operation. Check spark
plug condition.
Allow engine to cool. Remove top end
and inspect. Remove "high" spots on
piston with No. 600 grit, wet sandpaper.
Clean, and carefully reassemble.
Check entire unit for loose or misadjusted
fittings/controls/fasteners.
Re-start engine and check through entire
operating range thoroughly. Stop. Check
spark plug condition. Re-start. After 10 ~
15 minutes operation, machine is ready
to ride.
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