2017 YAMAHA YFM90 Owners Manual

Page 105 of 130

YAMAHA YFM90 2017  Owners Manual 8-23
8
1. Loosen the upper locknut and fully turn in the
upper adjusting bolt.
2. Loosen the lower locknut.
3. Turn the lower adjusting bolt in direction (a) to increase the lever free play, and in di

Page 106 of 130

YAMAHA YFM90 2017  Owners Manual 8-24
86. Tighten the upper locknut.
TIPAfter adjusting the brake lever free play, check the
front brake shoes for wear. EBU33782Adjusting the rear brake lever free playThe rear brake lever free play m

Page 107 of 130

YAMAHA YFM90 2017  Owners Manual 8-25
8
TIPAfter adjusting the brake lever free play, check the
rear brake shoes for wear. EBU34013Drive chain slackThe drive chain slack should be checked before
each ride and adjusted if necessary.
T

Page 108 of 130

YAMAHA YFM90 2017  Owners Manual 8-26
8To adjust the drive chain slack
1. Loosen the bolts and nuts. 2. Loosen the rear brake lever free play adjust-
ing nut.
3. Loosen the locknut.
1. Bolt
1. Nut
1
1
1. Rear brake lever free play ad

Page 109 of 130

YAMAHA YFM90 2017  Owners Manual 8-27
8
4. To tighten the drive chain, turn the drive chain
slack adjusting nut in direction (a). To loosen
the drive chain, turn the adjusting nut in direc-
tion (b) and push the rear wheels forward.

Page 110 of 130

YAMAHA YFM90 2017  Owners Manual 8-28
81. Clean the drive chain with kerosene and a
small soft brush.  NOTICE: To prevent dam-
aging the O-rings, do not clean the drive
chain with steam cleaners, high-pressure
washers or inappropriat

Page 111 of 130

YAMAHA YFM90 2017  Owners Manual 8-29
8
do not work smoothly, you could be unable
to control the ATV, which could lead to an
accident or collision.
 EBU28703Checking and lubricating the front and 
rear brake leversThe operation of th

Page 112 of 130

YAMAHA YFM90 2017  Owners Manual 8-30
8
EBU28824Lubricating the front knuckle pivotsThe front knuckle pivots must be lubricated at the
intervals specified in the periodic maintenance
and lubrication chart.TIPFor parts equipped with a