Yamaha Rx 1 User Guide

5-13
ESU00053 
V-belt holders
Keep a spare V-belt for emergency use by placing it into
the V-belt holders provided.
CAUTION:@ 
Make sure that the V-belt is installed securely in the
holders. 
@ 
ESU00342
Storage compartment
The storage compartment is located under the shroud. 
Open the storage compartment to store the tool kit,
spare parts, or other small items.
U8FA11.book  Page 13  Thursday, April 3, 2003  4:09 PM 

6-1
ESU00072
6-PRE-OPERATION CHECKS
NOTE:@ Pre-operation checks should be made each time the
snowmobile is used. 
@
WARNING@ 
The engine and muffler will be very hot after the
engine has been run.
Avoid touching the engine and muffler while they are
still hot with any part of your body or clothing during
inspection or repair. 
@ 
ESU00075
Fuel
Make sure that there is sufficient fuel in the fuel tank.
WARNING@ 

Fuel is HIGHLY FLAMMABLE and poisonous.
Check the “SAFETY INFORMATION” section
carefully...

6-2
CAUTION:@ 

Oxygenated fuels (gasohol) containing a maxi-
mum 5% of ethanol can be used, although richer
jetting may be required to prevent engine dam-
age. Consult a Yamaha dealer. Gasohol contain-
ing methanol is not recommended. 

Make sure that snow or ice does not enter the fuel
tank when refueling. 

Do not use alcohol deicers or water absorbing
additives with oxygenated fuel. 

The fuel tank should be filled with straight gaso-
line as specified. 
@ 
ESU00343
Engine oil
Use a combination of...

6-3
ESU00344
Engine oil level
The engine oil level should be checked before each use.
CAUTION:@ 
Do not run the engine with too much or not enough
oil in the oil tank. Oil could flow into the air filter case
and the engine could be damaged. 
@
Checking the engine oil level
1. Place the snowmobile on a level surface and apply
the parking brake.
2. Start the engine, warm it up for 10–15 minutes, and
then turn it off.
3. Disconnect the oil level gauge coupler 
1.
CAUTION:@ 
Disconnect the oil level gauge...

6-4
ESU00086 
Coolant
Check the coolant level in the coolant reservoir when the
engine is cold. If the coolant level is below the
“COLD LEVEL” mark, add soft water until it reaches the
“COLD LEVEL” mark. (See pages 8-13–8-14 for more
details.)
1“COLD LEVEL” mark
WARNING@ 
Do not remove the coolant reservoir cap when the
engine is hot. 
@
CAUTION:@ 

Hard water or salt water is harmful to the engine
parts. You may use boiled or distilled water, if soft
water is not available. 

Tap water can be used...

6-5
ESU00087 
Throttle lever
Check the throttle lever operation before starting the
engine. 
The throttle lever must open smoothly and spring back to
its home position when released. 
ESU00090 
Throttle override system (T.O.R.S.) 
Check the T.O.R.S. for proper operation.
WARNING@ 
When checking T.O.R.S.: 

Make sure that the parking brake is applied. 

Make sure that the throttle lever moves smoothly. 

Do not run the engine up to clutch engagement
r/min. Otherwise, the snowmobile could start
moving...

6-6
ESU00091 
Brake
1. Brake lever 
Test the brake at a low speed when starting out to
make sure that it is working properly. If the brake
does not provide proper braking performance,
inspect the brake for wear or brake fluid leakage.
(See pages 8-19–8-20 for more details.)
WARNING@ 

A soft, spongy feeling in the brake lever indicates
a failure in the brake system. 

Do not operate the snowmobile if you find any
problems in the brake system. You could lose
braking ability, which could lead to an...

6-7
ESU00093
Brake fluid leakage
Apply the brake for a few minutes. Check to see if any
brake fluid leaks out from the brake hose joints or the
master cylinder.
WARNING@ 
If brake fluid leakage is found, ask a Yamaha dealer
for immediate repairs. 
@
CAUTION:@ 
Brake fluid may deteriorate painted surfaces or plas-
tic parts. Never spill any brake fluid. If any is spilled,
clean it up immediately. 
@ 
ESU00094 
V- b e l t
Open the shroud and remove the drive guard. 
Check the V-belt for wear and damage....

6-8
ESU00097
Drive track
Check the drive track for deflection, wear, or damage. 
Adjust or replace if necessary. (See pages 8-28–8-30 for
more details.)
WARNING@ 
Do not operate the snowmobile if you find damage to
the drive track, or if it has been maladjusted. Drive
track damage or failure could result in loss of brak-
ing ability and snowmobile control, which could
cause an accident. 
@
ESU00243 
51-mm (2.0-in) high-profile pattern drive track
For RX10M/RX10MS
This snowmobile is originally equipped...

6-9
ESU00102 
Skis and ski runners
Check the skis and ski runners for wear and damage.
Replace if necessary.
CAUTION:@ 
Avoid scratching the skis when loading and unload-
ing the snowmobile, when riding in areas with little
or no snow, or on sharp edges such as concrete,
curbs, etc. This will wear or damage the skis. 
@
ESU00103 
Steering system
Check the handlebar for excessive free play:
1. Push the handlebar up and down and back and forth.
2. Turn the handlebar slightly to the right and left.
If...