2007 YAMAHA TTR90 Owners Manual

Page 41 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-3
6
EAU39943
Periodic maintenance chart for the emission control system NOTE:
From 7000 km (4200 mi) or 18 months, repeat the maintenance intervals starting fr

Page 42 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
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6
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General maintenance and lubrication chart No. ITEM CHECKS AND MAINTENANCE JOBSINITIAL ODOMETER READINGS
1000 km 
(600 mi) or 
1 month or 
30 hours3

Page 43 of 82

YAMAHA TTR90 2007  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
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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

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