Checking The Secondary Shaft And Driven Sprocket; Checking The Chain - Yamaha 2004 YXR660 Service Manual

TRANSMISSION
2. Check:
• gear movement
Unsmooth → Repeat steps #1 or replace
the defective parts.
3. Check:
• circlip
Bends/looseness/damage → Replace.
CHECKING THE SECONDARY SHAFT AND
DRIVEN SPROCKET
1. Check:
• gear teeth
Blue discoloration/pitting/wear → Replace.
2. Check:
• gear movement
Unsmooth → Repeat steps #1 or replace
the defective parts.
3. Check:
• circlip
Bends/looseness/damage → Replace.

CHECKING THE CHAIN

1. Check:
• chain
Cracks/shift → Replace the chain, second-
ary shaft and driven sprocket as a set.
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ENG