Snowmobile Yamaha RX1 (2003 year). Manual - part 5

5-1

ESU00013 

5-

CONTROL FUNCTIONS

ESU00362

Main switch

The main switch controls the following items.

1 “OFF” 
The ignition circuit is switched off. 
The key can be removed only in this position.

2 “ON” 
The ignition circuit is switched on.

3 “START” 
The starting circuit is switched on. 
The starter motor starts.

CAUTION:

@ 

Release the switch immediately after the engine
starts. 

@

NOTE:

@ 

The headlights, meter lights, and taillights come on after
the engine starts. 

@

5-2

ESU00020 

Starter lever (choke)

Use the starter lever (choke) when starting and warming
up a cold engine.

1 Starter lever (choke) 
2 When starting a cold engine. 
3 Warming up 
4 When the engine is warm.

NOTE:

@ 

Refer the “Starting the engine” section for proper opera-
tion. 

@ 

ESU00022 

Throttle lever

Once the engine is running cleanly, squeezing 

a the throt-

tle lever 

1 will increase the engine speed and cause

engagement of the drive system. Regulate the speed of
the snowmobile by varying the throttle position. Because
the throttle is spring-loaded, the snowmobile will deceler-
ate, and the engine will return to idle when it is released 

b.

WARNING

@ 

Check the throttle, brake, and steering for proper
operation before starting the engine. 

@ 

ESU00361

Engine overheating prevention system

This model is equipped with an engine overheating pre-
vention system to prevent overheating when the engine
is idling.
When the engine has been idling for at least 3 minutes
and the coolant temperature has risen above 100 °C
(212 °F), the engine automatically shuts off to prevent
overheating.

NOTE:

The engine can be started after it shuts off.

5-3

ESU00023 

Throttle override system (T.O.R.S.)

If the carburetor or throttle cable should malfunction dur-
ing operation, the T.O.R.S. will operate when the throttle
lever is released. 
The T.O.R.S. is designed to interrupt the ignition and
keep the engine revolution speed between 2,800 and
3,000 r/min if the carburetor fails to return to idle when
the lever is released.

WARNING

@ 

●

If the T.O.R.S. is activated, make sure that the
cause of the malfunction has been corrected and
that the engine can be operated without a prob-
lem before restarting the engine. 

●

Be sure to use the specified spark plug and spark
plug cap. Otherwise, the T.O.R.S. will not work
properly. 

@

CA-01E

È Idle or starting 
É Run 
Ê Trouble 
1 Carburetor switch 
2 Throttle switch 
3 Throttle cable 
4 Throttle valve 
a On 
b Off 

A

B

C

Mode

Switch

Idle 

or 

starting

Run

Trouble

Throttle switch

Off

On

Off

Carburetor switch

On

Off

Off

Engine

Run

Run

T.O.R.S. 
will operate

A

B

C

5-4

ESU00339

Speedometer unit

The speedometer unit is equipped with the following:

●

a digital speedometer (which shows riding speed)

●

an odometer (which shows the total distance trav-
eled)

●

a tripmeter (which shows the distance traveled since
it was last set to zero)

●

warning indicators (which show self-diagnosis, cool-
ant temperature, fuel level, and oil level warnings)

●

fuel meter (which shows the fuel remaining in the fuel
tank)

●

grip/thumb warmer heat level indicator (which shows
the heat level of the grip warmer or the thumb
warmer)

After the engine is started, the tachometer 

1 makes one

sweep, and the warning light 

2 and all segments of the

meter 

3 turn on and off once. Then the warning light

turns on again, and then goes off if there are no prob-
lems. The grip warmer heat level is initially displayed for
5 seconds, then switches to the fuel meter display.

Odometer and tripmeter modes
Pushing the select/reset button 

4 switches the display

between the odometer mode “ODO” and the tripmeter
mode “TRIP”.
To reset the tripmeter, push the select/reset button for at
least one second while the tripmeter is displayed.

NOTE:

@ 

To switch the speedometer, odometer, and tripmeter dis-
plays between kilometers and miles, select the odometer
mode  “ODO”, and then push the select/reset button 

4

for at least 10 seconds. 

@

ESU00363

High beam indicator light

The high beam indicator light 

1 comes on when the high

beams of the headlights are switched on. (See page 5-12
for headlight beam switch operation.)