TT250Owner’s andServiceManual
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93
Item Symptom Cause VehicleEffect MaintenanceAction
lowpower ontheair
cleaner
element
idling,excessivefuel
consumption,darksmoke
exhaust
cleanerelement
Excessiveintake
noise
Cracksorchaps
ontheair
cleanershell
Poorperformance,excessive
intakenoise
Replacetheaircleaner
shell
Exhaust
system
Excessive
exhaustnoise
Cracksor
openingsin
exhaustsystem
Poorperformance,excessive
noise
Replacedefective
components
Exhaust
system
Smoke
emanatingfrom
exhaust
Wornrings,
wornvalve
seal,chokein
onposition,
carburetortoo
rich
Smoketrail Checkchokeposition,
checkcarburetor,perform
compressioncheck(if
compressionlow,isolate
causeandcorrect)
Engine Poorengine
performance
Seebelow Seebelow Seebelow
Starter Difficultstarting Cloggedair
filter,
carburetornot
adjusted
correctly,
valvestoo
tight,battery
low
Difficulttostartengine Checkairfilter,check
chargingcircuit,check
valves;adjust/correctas
required
Engine Overheating Mudorother
debrisin
coolingfins,
lowoil,running
intoohigha
gear,engine
runningtoo
lean
Engineoverheats Checkforairleaksinintake
path,checktomakesure
allfinsareclear,checkoil
level,checkvalve
adjustment.
Engine Excessivefuel
consumption
Cloggedair
filter,engine
valvesnot
adjusted
correctly,
carburetornot
adjusted
correctly;chain
tootight,tire
pressurelow
Poorfueleconomy Checkpossiblecausesand
correctanydepartures
fromrequiredadjustment
setting
Engine Missingor
sputters
Defectivespark
plug,defective
coil,defective
ignitionwiring
Missing Inspectandreplace
defectivecomponent(s).
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