Yamaha Rx 1 User Guide

7-10
CAUTION:@ 
Do not shift from “FWD” to “REV” or from “REV” to
“FWD” while the snowmobile is moving. Otherwise,
the drive system could be damaged. 
@
NOTE:@ The reverse buzzer beeps while the shift lever is in
reverse. 
@
2. Release the parking brake by moving the parking
brake lever to the right. 
3. Press the throttle lever slowly to move the snowmo-
bile. 
4. Turn the handlebar in the desired direction. 
5. Squeeze the brake lever to stop the snowmobile. 
6. Apply the parking brake by moving the...

7-11
ESU00367
Transporting
When transporting your snowmobile on a trailer or in a
truck, observe the following recommendations to help
protect it from damage:

Make sure that the fuel level in the fuel tank is lower
than the bottom of the carburetors. Otherwise, the
vibration and bumps from the road surface could
make it possible for fuel to flow through the carbure-
tors into the cylinders. This can result in “hydrostatic
lock,” a condition where the engine cannot rotate
because of fuel accumulated in...

8-1
ESU00139 
8-PERIODIC MAINTENANCE
ESU00140
Periodic maintenance chart
Regular maintenance is most important for best performance and safe operation.CD-01E
Item RemarksPre-
operation 
check 
(Daily)Initial
1 month 
or 
800 km 
(500 mi) 
(40 hr)Every
Page Seasonally 
or 
3,200 km 
(2,000 mi) 
(160 hr)
Spark plugsCheck condition.
Adjust gap and clean. 
Replace if necessary.
8-4–8-5
∗Valve clearanceCheck clearance.
Adjust clearance when engine 
is cold.Every 40,000 km (25,000 mi) 8-10
Engine oilCheck oil...

8-2
Drive guardCheck for cracks, bends or 
damage.
∗Replace if necessary.
5-12, 6-7
V-beltCheck for wear and damage.
Replace if necessary.
6-7,
8-15–8-17
Drive track and idler 
wheelsCheck deflection, and for wear 
and damage. 
∗Adjust/replace if necessary.
6-8,8-28–8-30
Slide runnersCheck for wear and damage.

6-8
∗Replace if necessary.


Brake and parking 
brakeCheck operation and fluid 
leakage.

5-10–5-11, 
6-6–6-7
8-19–8-20
∗Adjust free play and/or re-
place pads if necessary.

∗Replace brake fluid....

8-3
NOTE:@ Brake fluid replacement: 
1. When disassembling the master cylinder or caliper cylinder, replace the brake fluid.
Normally check the brake fluid level and add the fluid as required. 
2. On the inner parts of the master cylinder and caliper cylinder, replace the oil seals
every two years. 
3. Replace the brake hose every four years, or if cracked or damaged. 
@ 
∗Primary and second-
ary clutchesCheck engagement and shift 
speed.
Adjust if necessary.

Whenever operating elevation is changed....

8-4
ESU00376
Tool kit
The owner’s tool kit has the tools which are sufficient for
most periodic maintenance and minor repair. A torque
wrench is also necessary to properly tighten nuts and
bolts.
1Tool kit
CAUTION:@ 
Before starting the engine, make sure that the tool
kit is firmly seated in the holder and is closed
securely. 
@
NOTE:@ If you do not have a torque wrench available during a
service operation requiring one, take your snowmobile to
a Yamaha dealer to check the torque settings and adjust
them...

8-5
Spark plugs are produced in several different thread
lengths. The thread length or reach is the distance from
the spark plug gasket seat to the end of the threaded
portion. If the reach is too long, overheating and engine
damage may result. If the reach is too short, spark plug
fouling and poor performance may result. Also, if the
reach is too short, carbon will form on the exposed
threads resulting in combustion chamber hot spots and
thread damage. Always use a spark plug with the speci-
fied...

8-6
ESU00370
Engine idle speed adjustment
CAUTION:@ 

Be sure to have a Yamaha dealer make this
adjustment. 

Make sure that the throttle lever moves smoothly. 

Make sure that the carburetor is synchronized
first. 
@
1. Start the engine and warm it up.
NOTE:@ Refer to the “Starting the engine” section. @
2. Turn the throttle stop screw 
1 in or out to adjust the
engine idle speed.
ESU00147
Throttle cable adjustment
CAUTION:@ 
Be sure to adjust the engine idle speed first. @
1. Loosen the locknut.
2....

8-7
ESU00369
Carburetor adjustment
CAUTION:@ 

Be sure to have a Yamaha dealer make this
adjustment. 

Make sure that the air filter case is installed dur-
ing running to prevent engine damage. 
@
Under some operating conditions the carburetor setting
may have to be changed due to air temperature changes,
elevation changes, use of alcohol oxygenated fuels, etc.,
and should be set by a Yamaha dealer.
CAUTION:@ 
The drive chain gears and V-belt clutch should be
adjusted when operating over a high altitude...

8-8
Jet needle adjustment
Adjust the jet needle by changing its clip position accord-
ing to the setting chart which is available at a Yamaha
dealer.
CD-03E
1. Remove the top cover of the carburetor and jet nee-
dle. 
2. Change the clip to the proper position. Make sure
that the plastic washer is in place below the clip.
WARNING@ 
Make sure that the throttle outer cable is firmly
seated in the holder and the throttle operates
smoothly after assembling the carburetor. 
@
3. Assemble by reversing the...