Yamaha FZ09E 2014 Service Manual page 214

Refer to "ADJUSTING THE DRIVE CHAIN
SLACK" on page 3-16.
Drive chain slack
5.0–15.0 mm (0.20–0.59 in)
ECA13550
NOTICE
A drive chain that is too tight will overload
the engine and other vital parts, and one that
is too loose can skip and damage the swing-
arm or cause an accident. Therefore, keep
the drive chain slack within the specified lim-
its.
4-74
CHAIN DRIVE