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.
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							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 before refueling. (See page 3-2.) 

Do not fill the fuel tank above the bottom of the
filler tube 1
. Fuel could overflow if the snowmo-
bile is tilted on its side or if the ambient tempera-
ture rises, causing the fuel to warm up and
expand. 

Make sure that the fuel tank cap is closed
securely after refueling. Leaking fuel can catch
fire. 
@
2Fuel level
Recommended fuel: 
Unleaded gasoline 
Pump octane  ; 88 or higher 
Fuel tank capacity: 
38.0 L (8.4 Imp gal, 10.0 US gal)
R+M2
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							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 the recommended SAE and API oil
classifications shown in the chart below.
CB-01E
CAUTION:@ 

Use only 4-stroke engine oil. 

Engine oil also lubricates the starter clutch. In
order to prevent clutch slippage, do not mix any
chemical additives with the oil or use oils of a
higher grade than “CD”. In addition, do not use
oils labeled “ENERGY CONSERVING II” or higher. 
@
SAE API
SE, SF, SG
or
higher
-40˚
-20˚ 0˚
20˚40˚60˚ F
SAE 5W-30
-40˚
-29˚ -18˚
-7˚4˚16˚ C
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							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 coupler before remov-
ing the oil level gauge/dipstick. Otherwise the cable
can twist and become severed. 
@
4. Remove the oil level gauge/dipstick 
2, wipe it clean,
insert it back into the filler hole (without screwing it
in), and then remove it again to check the oil level.
NOTE:@ The engine oil should be between the “F” 
3 and “E” 
4
level marks on the oil level gauge/dipstick. 
@
5. If the engine oil is below the “E” level mark, add suffi-
cient oil of the recommended type to raise it to the “F”
level mark. (See page 6-2 for recommended oil.)
CAUTION:@ 

When adding the engine oil, be careful not to fill
above the “F” level mark on the oil level
gauge/dipstick. 

Make sure that no foreign material enters the
engine oil tank. 
@
6. Insert the oil level gauge/dipstick into the oil filler
hole, and then tighten it securely.
7. Connect the oil level gauge coupler.
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							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 temporarily in an emer-
gency. 
@
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							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 forward unexpectedly, which could cause
an accident. 
@
1. Start the engine.
NOTE:@ Refer to the “Starting the engine” section. @
2. Hold the pivot point of the throttle lever away from the
throttle switch by putting your thumb (above) and
forefinger (below) between the throttle lever pivot 
1
and the engine stop switch housing 
2. 
While holding the pivot point as described above,
press the throttle lever 
3 gradually. 
The T.O.R.S. will operate and the engine should run
between 2,800 and 3,000 r/min.
WARNING@ 
If the engine does not run between 2,800 and
3,000 r/min, stop the engine by turning the main switch
to the “OFF” position and consult a Yamaha dealer. 
@
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							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 accident.
Ask a Yamaha dealer to inspect and repair the
brake system. 
@
CAUTION:@ 
Make sure that the brake lever end does not project
out over the handlebar end. This is to prevent brake
lever damage when the snowmobile is placed on its
side. 
@
2. Brake fluid 
Check the brake fluid level. (See page 8-20.) 
Add fluid if necessary.
1Lower level
Specified brake fluid: DOT 4 
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							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. Replace if neces-
sary.
WARNING@ 

Make sure that the drive guard is tightened
securely before operating the snowmobile. 

Never run the engine without the V-belt or with
the drive guard removed. 
@ 
ESU00096 
Drive guard
Check the drive guard mounts for damage. Make sure
that the drive guard is firmly in place.
Wear limit 
a: 32.5 mm (1.28 in)
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							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 with a 51-mm
(2.0-in) high-profile pattern drive track specifically for use
in deep snow riding conditions. 
Therefore, avoid prolonged operation on hard surfaces
such as ice, hard-packed snow, dirt, etc., to extend the
life of the track and slide runners.
CAUTION:@ 

Only use in deep snow riding conditions. 

Operation on areas with light snowfall, ice, hard-
packed snow, dirt, or grass will result in rapid
wear or damage to the track and slide runners
from lack of snow which serves as a lubricant. 
@
ESU00098 
Slide runners
Check the slide runners for wear and damage. 
If the slide runners reach the wear limit, they should be
replaced.
1Slide runners 
aWear limit
CAUTION:@ 
Ride on fresh snow frequently. Operating on ice or
hard packed snow will rapidly wear the slide runners. 
@ 
Wear limit height: 10 mm (0.4 in)
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							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 excessive free play is noticed, consult a Yamaha
dealer. 
ESU00378
Lights
Check the lights. 
Replace any burned out bulbs.
CAUTION:@ 
Avoid using a scraper or hot water for cleaning the
plastic lenses 1
. 
@
Ski runner wear limit 
a: 
8 mm (0.31 in) 
Ski wear limit 
b: 
24 mm (0.95 in)
U8FA11.book  Page 9  Thursday, April 3, 2003  4:09 PM