Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 55

5-40

ENG

AC MAGNETO ROTOR AND STARTER CLUTCH

REMOVAL

1. Remove:

• AC magneto rotor bolt 1 
• Washer

NOTE:

While holding the AC magneto rotor 2 with the
sheave holder 3, loosen the AC magneto rotor
bolt.

Sheave holder:

90890-01701

Primary clutch holder:

YS-01880-A

1

2

3

2. Remove:

• AC magneto rotor 1 

(with the flywheel puller 2 and flywheel puller
attachment)

• Woodruff key

CAUTION:

To protect the end of the crankshaft, place a fly-
wheel puller attachment between the flywheel
puller set’s center bolt and the crankshaft.

NOTE:

Make sure the flywheel puller is centered over the
AC magneto rotor.

Flywheel puller:

90890-01362

Heavy duty puller:

YU-33270-B

Flywheel puller attachment:

90890-04089

Crankshaft protector:

YM-33282

1

2

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AC MAGNETO ROTOR AND STARTER CLUTCH

3. Remove:

• Starter clutch

NOTE:

While holding the AC magneto rotor with the
sheave holder, remove the starter clutch bolts 1.

Sheave holder:

90890-01701

Primary clutch holder:

YS-01880-A

1

INSPECTION

1. Inspect:

• Stator coil

Damage 

→ Replace the stator coil.

2. Inspect:

• Starter clutch rollers 1 

Damage/wear 

→ Replace.

3. Inspect:

• Starter clutch idle gear 1 
• Starter clutch gear 2 

Burrs/chips/roughness/wear 

→ Replace the

defective part(s).

• Starter clutch gear contacting surfaces 

a 

Damage/pitting/wear 

→ Replace the starter 

clutch gear.

2

1

a

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AC MAGNETO ROTOR AND STARTER CLUTCH

4. Inspect:

• Starter clutch operation

Installation steps:

• Install the starter clutch gear onto the starter

clutch and hold the AC magneto rotor.

• When turning the starter clutch gear clockwise

È, it should turn freely, otherwise the starter
clutch is faulty and must be replaced.

• When turning the starter clutch gear counter-

clockwise 

É, the starter clutch and the starter

clutch gear should engage, otherwise the
starter clutch is faulty and must be replaced.

É

È

INSTALLATION

1. Install:

• Starter clutch

NOTE:

While holding the AC magneto rotor with the
sheave holder, tighten the starter clutch bolts.

2. Tighten:

• Starter clutch bolts 1 

3. Install:

• Woodruff key
• AC magneto rotor
• Washer
• AC magneto rotor bolt

NOTE:

• Clean the tapered portion of the crankshaft and

the AC magneto rotor hub.

• When installing the AC magneto rotor, make sure

the woodruff key is properly seated in the key-
way of the crankshaft.

Sheave holder:

90890-01701

Primary clutch holder:

YS-01880-A

T

 

R

.

.

Starter clutch bolt:

12 Nm (1.2 m · kg, 8.7 ft · lb)
LOCTITE

®

1

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AC MAGNETO ROTOR AND STARTER CLUTCH

4. Tighten:

• AC magneto rotor bolt 1 

NOTE:

• Lubricate the AC magneto rotor bolt and washer

with engine oil.

• While holding the AC magneto rotor 2 with the

sheave holder 3, tighten the AC magneto rotor
bolt.

T

 

R

.

.

AC magneto rotor bolt:

130 Nm (13.0 m · kg, 94 ft · lb)

Sheave holder:

90890-01701

Primary clutch holder:

YS-01880-A

1

2

3

5. Apply:

• Sealant

(onto the AC magneto lead grommet)

Yamaha bond No. 1215:

90890-85505
(Three Bond No.1215

®

)

6. Install:

• AC magneto rotor cover

NOTE:

Apply locking agent (LOCTITE

®

) to the threads of

the bolt 1, which is indicated by the “

” mark 

a

on the AC magneto rotor cover.

T

 

R

.

.

AC magneto rotor cover bolt:

12 Nm (1.2 m · kg, 8.7 ft · lb)
LOCTITE

®

1

a