Snowmobile Yamaha RX1 (2003 year). Manual - part 17

8-15

ESU00166 

V-belt replacement

WARNING

@ 

When installing the new V-belt, make sure it is posi-
tioned from 1.5 mm (0.06 in) above the edge of the
secondary sheave assembly to 0.5 mm (0.02 in)
below the edge 

a. 

If not, the V-belt clutch engagement speed will be
changed. The snowmobile may move unexpectedly
when the engine is started. 
Adjust the V-belt position by removing or adding a
spacer 

1 on each adjusting bolt. 

Have a Yamaha dealer make this adjustment. 

@

CAUTION:

@ 

As the V-belt wears, adjustment may be necessary.
To ensure proper clutch performance, the V-belt
position should be adjusted by adding a spacer on
each adjusting bolt when the V-belt position reaches
1.5 mm (0.06 in) below the edge. 
Have a Yamaha dealer make this adjustment. 

@

CD-05E

NOTE:

@ 

Apply the parking brake before replacing the V-belt.

@

1. Remove the drive guard.

2. Rotate the secondary sliding sheave clockwise 

1

and push 

2 it so that it separates from the secondary

fixed sheave. 

New belt width

34.5 mm (1.36 in)

Belt wear limit width

32.5 mm (1.28 in)

8-16

3. Pull 

3 the V-belt up over the secondary fixed sheave.

4. Remove the V-belt from the secondary sheave

assembly and primary sheave assembly. 

5. Put the new V-belt back on the secondary sheave

assembly only. Do not force the V-belt between the
sheaves; the secondary sliding and fixed sheave
must touch each other. Measure the V-belt position.

6. If the position is incorrect, adjust the V-belt position

by removing or adding a spacer 

4 on each adjusting

bolt 

5.

CD-06E

7. Tighten each adjusting bolt.

Standard V-belt position 

a:

From 1.5 mm (0.06 in) above the edge of the second-
ary sheave to 0.5 mm (0.02 in) below the edge.

V-belt position

Adjustment

More than 1.5 mm (0.06 in) 
above the edge

Remove spacer

From 1.5 mm (0.06 in) 
above the edge to 0.5 mm 
(0.02 in) below the edge

Not necessary 
(It is correct.)

More than 0.5 mm (0.02 in) 
below the edge

Add spacer

Adjusting bolt tightening torque: 

10 Nm (1.0 m·kgf, 7.2 ft·lb) 

8-17

8. Install the V-belt over the primary sheave assembly.

9. Rotate the secondary sliding sheave clockwise 

6

and push 

7 it so that it separates from the secondary

fixed sheave. 

10. Install the V-belt 

8 between the secondary sliding

and secondary fixed sheaves.

11. Install the drive guard.

WARNING

@ 

Never run the engine with the V-belt or drive guard
removed. 

@

ESU00351

Checking the oil level of the drive chain hous-
ing

WARNING

@ 

The engine, oil tank, brake disc, and coolant hoses
will be very hot after the engine has been run. Avoid
contact while they are still hot with any part of your
body or clothing during inspection or repair. 

@

1. Place the snowmobile on a level surface. 
2. Remove the dipstick 

1 and wipe it off with a clean

rag. Then put the dipstick in the hole.

8-18

3. Remove the dipstick and check that the oil is between

the upper and lower levels. If not, add oil to the upper
level.

2 Upper level 
3 Lower level

È For models without reverse transmissions 

(RX10/RX10S/RX10M/RX10MS)

É For models with reverse transmissions 

(RX10R/RX10RS)

CAUTION:

@ 

Make sure that no foreign material enters the drive
chain housing. 

@

4. Install the dipstick and align the notch 

4 of the dip-

stick handle with the projection 

5 of the drive chain

housing.

Chain tension adjustment

1. Loosen the chain adjuster locknut. 
2. Turn the adjuster bolt clockwise until it is finger tight. 
3. Hold the adjuster bolt in place while tightening the

chain adjuster locknut.

1 Chain adjuster locknut 
2 Adjuster bolt

A

B

Drive chain oil:API GL-3 

SAE 75 or 80