Yamaha VK540EF Service Manual page 202

DRIVE CHAIN HOUSING
14. Measure:
S 14 link section a of the drive chain
Using a spring scale, pull on the drive chain
with 36 kg (80 lbs) of force b .
Out of specification ! Replace the drive
chain.
Maximum 14 link drive chain
section length a :
133.35 mm (5.25 in)
Limit 137.35 mm (5.41 in)
NOTE:
S Measure the length between drive chain pin 1
and 15 as shown.
S Perform this measurement at two or three dif-
ferent places.
If replacement is necessary, always replace the
chain and the sprockets as a set.
15. Inspect:
S Drive chain 1
Stiffness ! Clean and lubricate or replace.
S Drive chain plates 2
Damage/wear ! Replace the drive chain.
Cracks ! Replace the drive chain.
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POWR
TR