Yamaha YXR660FAS Service Manual download pdf (Page 186)

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ENG

PRIMARY AND SECONDARY SHEAVES

REMOVING THE PRIMARY AND

SECONDARY SHEAVES

1. Loosen:

• secondary sheave nut 1

• primary sheave nut 2

NOTE:

• Use the sheave holder 3 to hold the primary

sheave.

• First, loosen the secondary sheave nut 1,

then loosen the primary sheave nut 2.

Primary sheave holder

P/N. YS-01880-A

Sheave holder

P/N. 90890-01701

DISASSEMBLING THE SECONDARY

SHEAVE

1. Remove:

• nut 1

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a. Attach the sheave fixed block 2, locknut

wrench 3 and sheave spring compressor

4 to the secondary sheave assembly.

b. Place the sheave fixed block in a vise and

secure it.

c. Tighten the sheave spring compressor nut

5 and compress the spring.

d. Loosen the nut 1 with the locknut wrench

3.

e. Remove the nut 1.

f. Remove the sheave spring compressor and

locknut wrench.

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Sheave fixed block

P/N. YM-04135, 90890-04135

Locknut wrench

P/N. YM-01348, 90890-01348

Sheave spring compressor

P/N. YM-04134, 90890-04134

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