check engine YAMAHA TTR90 2002 User Guide

YAMAHA TTR90 2002 User Guide TTR90 2002 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/51690/w960_51690-0.png YAMAHA TTR90 2002 User Guide

Page 132 of 288

YAMAHA TTR90 2002 User Guide 3 - 12
INSP
ADJ
DRIVE CHAIN SLACK ADJUSTMENT
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the
suitable stand under the engine.
2. Check:
lDrive chain slack a 
In the center betwee

Page 138 of 288

YAMAHA TTR90 2002 User Guide 3 - 15
INSP
ADJSPOKES INSPECTION AND TIGHTENING/WHEEL INSPECTION/
STEERING HEAD INSPECTION AND ADJUSTMENT
SPOKES INSPECTION AND TIGHTENING
1. Inspect:
lSpokes 1 
Bend/damage ® Replace.
Loose spoke ®

Page 146 of 288

YAMAHA TTR90 2002 User Guide 3 - 19
INSP
ADJ
ELECTRICAL/SPARK PLUG INSPECTION
EC370000
ELECTRICAL
EC371001
SPARK PLUG INSPECTION
1. Remove:
lSpark plug
2. Inspect:
lElectrode 1 
Wear/damage ® Replace.
lInsulator color 2 
Normal

Page 238 of 288

YAMAHA TTR90 2002 User Guide 4 - 46
ENGSHIFT FORK, SHIFT CAM AND TRANSMISSION
EC4H3000
REMOVAL POINTS
Shift fork, shift cam and transmission
1. Remove:
lShift forks
lShift cam
lDrive axle assembly
lMain axle assembly
NOTE:
lTap l

Page 266 of 288

YAMAHA TTR90 2002 User Guide –+ELEC
6 - 2
IGNITION SYSTEM
EC620000
IGNITION SYSTEM
INSPECTION STEPS
Use the following steps for checking the possibility of the malfunctioning engine being attributable to
ignition system failure

Page 270 of 288

YAMAHA TTR90 2002 User Guide 6 - 3
–+ELECIGNITION SYSTEM
EC622001
SPARK GAP TEST
1. Disconnect the spark plug cap from spark
plug.
2. Connect the dynamic spark tester 1
(ignition checker 2) as shown.
lSpark plug cap 3 
lSpark p
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