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10. PROPERLY SECURE THE
MACHINE BEFORE TRANS-
PORTING IT.
When transporting the ma-
chine in another vehicle, al-
ways be sure it is properly
secured and in an upright po-
sition and that the fuel cock is
in the "OFF" position. Other-
wise, fuel may leak out of the
carburetor or fuel tank.
TO THE NEW OWNER
This manual will provide you with a
good basic understanding of fea-
tures, operation, and basic mainte-
nance and inspection items of this
machine. Please read this manual
carefully and completely before oper-
ating your new machine. If you have
any questions regarding the opera-
tion or maintenance of your machine,
please consult your Yamaha dealer.
This manual should be considered a
permanent part of this machine and
should remain with it even if the ma-
chine is subsequently sold.
NOTICE
Some data in this manual may be-
come outdated due to improve-
ments made to this model in the
future. If there is any question you
have regarding this manual or your
machine, please consult your
Yamaha dealer.
F.I.M. MACHINE WEIGHTS
Weights of machines without fuel
The minimum weights for motocross
machines are:
for the class 125 cc: minimum 88 kg
(194 lb)
for the class 250 cc: minimum 98 kg
(216 lb)
for the class 500 cc: minimum 102 kg
(225 lb)
In modifying your machine (e.g., for
weight reduction), take note of the
above limits of weight.
HOW TO USE THIS MANUAL
FINDING THE REQUIRED PAGE
1. This manual consists of seven
chapters; "General Information",
"Specifications", "Regular inspec-
tion and adjustments", "Engine",
"Chassis", "Electrical" and "Tun-
ing"
2. The table of contents is at the be-
ginning of the manual. Look over
the general layout of the book be-
fore finding then required chapter
and item.
Bend the book at its edge, as
shown, to find the required fore
edge symbol mark and go to a
page for required item and de-
scription.
MANUAL FORMAT
All of the procedures in this manual
are organized in a sequential, step-
by-step format. The information has
been complied to provide the me-
chanic with an easy to read, handy
reference that contains comprehen-
sive explanations of all disassembly,
repair, assembly, and inspection op-
erations.
In this revised format, the condition of
a faulty component will precede an
arrow symbol and the course of ac-
tion required will follow the symbol,
e.g.,
• Bearings
→
Pitting/damage
Replace.
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