2000 YAMAHA SR125 engine

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Page 36 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-6
6
EAU01833
Spark plugRemoval
1. Remove the spark plug cap.2. Use the spark plug wrench in the
tool kit to remove the spark plug as
shown.
Inspection
The spark

Page 38 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-8
6
EAU01093*
Engine oilOil level inspection
1. Place the motorcycle on the cen-
terstand. Warm up the engine for
several minutes.NOTE:@ Be sure the motorcycle

Page 39 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-9
6 4. Remove the filter cover screws,
drain bolt and the oil filter cover
and oil filter.
5. Clean the oil filter and strainer with
solvent. Replace if necessa

Page 40 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-10
6
EAU01094
Air filterThe air filter should be cleaned at the
specified intervals. It should be cleaned
more frequently if you are riding in un-
usually wet o

Page 41 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-11
6
EAU00629
Carburetor adjustmentThe carburetor is a vital part of the en-
gine and requires very sophisticated
adjustment. Most adjustments should
be left to

Page 42 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
EAU00634
Throttle cable free play 
adjustmentNOTE:@ Before checking the throttle cable free
play, the engine idling speed should be
adjusted. @Adjust the t

Page 43 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
EAU00637
Valve clearance adjustmentThe correct valve clearance changes
with use, resulting in improper fuel/air
supply or engine noise. To prevent this,
th

Page 52 of 78

YAMAHA SR125 2000  Owners Manual PERIODIC MAINTENANCE AND MINOR REPAIR
6-22
6
EAU01533
Drive chain slack adjustment1. Loosen the rear brake adjusting
nut.
2. Loosen the wheel axle nut.3. To tighten the chain, turn the chain
adjusting
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