2007 YAMAHA TTR90 maintenance

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Page 43 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-5
6
EAU40000
NOTE:The air filter needs more frequent service if you are riding in unusually wet or dusty areas.10*Chassis fastenersCheck all chassis fitting an

Page 44 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
EAU18740
Removing and installing the 
cowling and panel The cowling and panel shown above
need to be removed to perform some of
the maintenance jobs describ

Page 45 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
6
EAU19603
Checking the spark plug The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug

Page 46 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
62. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with

Page 47 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6 To change the engine oil
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the engine
to collect the used

Page 48 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
EAU41632
Cleaning the air filter element The air filter element should be cleaned
at the intervals specified in the periodic
maintenance and lubrication ch

Page 49 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6
CAUTION:
ECA15571

Make sure that the mesh and the
sponge material are properly
seated in the air filter case.

The engine should never be op-
erated wit

Page 50 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
EAU41230
Cleaning the spark arrester The spark arrester should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
WAR