Cold Engine Starting
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Hot Engine Starting
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Cold and Hot
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We offer the most
innovative line-up of four-stroke competition motorcycles in the
industry. To further enhance the enjoyment of these products, please
follow the step-by-step instructions as explained by Doug Dubach,
Four-Stroke Motocross Champion and Yamaha test rider. These helpful
tips will ensure quick and easy starting of your Yamaha four-stroke
motorcycle.
COLD ENGINE STARTING:
1.
Make sure the bike has fuel, then turn
on fuel petcock.
2.
Pull out choke knob
(black knob on left side of the carburetor).
3.
Prime the engine by
giving the throttle two full turns (only if
the bike has not been started in a day or
two).
4.
Apply firm
pressure to the kick-starter with your foot
until you hit distinct resistance (this is
the compression stroke/hard spot).
5.
While keeping pressure
on the kick-starter, pull in the compression
release lever and push the kick-starter past
the compression stroke/hard spot. The kick-starter
needs to only move about 1 to 2 inches past the hard
spot. That is all!
6.
Release the compression
release lever and return the kick-starter to
the top
7.
Now, kick to start. Do
not touch the throttle, as the engine will
start and idle on it's own
8.
If the bike
does not start, repeat steps 4 through 7
only until the engine starts.
HOT ENGINE STARTING
1.
Pull out the hot start
knob (red knob on the left side of the
carburetor).
2.
Follow steps 4 through 7
until engine starts.
3.
You may have to apply
some throttle after the engine starts until
you get the hot start knob pushed back in
because the carburetor is sending a lean mixture
while the hot start knob is out.
The only difference between hot and cold starting
is which knob you use, choke or hot start. There is no need
to deviate from these simple steps. Remember, DO NOT touch
the throttle during hot or cold starting. Also, there is no
reason to prime the engine again on the same day of riding.
OTHER HELPFUL TIPS
It helps to become comfortable with steps
4 through 7. By becoming familiar with these steps you will
become more efficient and will be able to perform them quicker.
The faster you can get through steps 4 through 7 the quicker
you will get going.
You need to give the engine
what it wants! Understand that the choke will give the engine
a rich mixture and the hot start will give the engine a lean
mixture. If you have kicked the engine several times during
a cold starting procedure and it still won't start, maybe
it has too much fuel. Don't be afraid to push the choke back
in and use the hot start, even though the engine is cold,
this will give the engine a lean mixture and that might be
just what it wants.
Again, make sure you don't go more than
an inch or two past the hard spot when setting up your kick,
and return the kick tarter all the way to the top, especially
on the 250F. This will ensure that you get a proper kick and
make your race day more enjoyable.
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1996-2001 Yamaha Motor Corporation, U.S.A. All rights
reserved.