CSC RX3 - Page 52

CSCRX3ServiceManual
www.CSCMotorcycles.com
51
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Enginediagnosisprocedure:Engineidlespeed.

Pooridles
p
eedofen
g
ine
Noidlespeedofengine
Higheridlespeedofengine
Unstable idlespeedofengine
Inspectcompression
pressureofcylinder
Pullthethrottlewithhandsandinspect
ifitiscompletelyclosed
Inspectiftheignitiontimingis
proper
Yes No
Inspectviathefailure
diagnostictester
Turnofftheignition
switch,resettheidle
speedstepmotor10
secondsafterthe
shutdownandrestart
thestepmotor
Checkifthewireropeofthe
acceleratoroperationcable
isflexiblydrawninthecable
wirecoverandifthethrottle
springisexcessivelysoft
Yes
No
Operational
compression
pressureof
cylinder
Insufficient
compression
pressureof
cylinder
①InspectiftheCDI
igniterfails
②Inspectifmagnetor
flywheelandthe
triggeringcoilare
loosened
Inspectifthe
clearancebetween
thesparkplug
electrodesissmall
Iftheidlespeedisstill
high,inspectwiththe
failuredia
g
nostictester
Yes
No
Inspectthemixingratioof
combustiblemixture
Adjustelectrode
clearance
Carbondepositionof
bypassairpassage
①Inspectiftheexternaljointofengine
hasleakage
②Inspectifvalvetimingmechanismis
proper
③Inspectifthevalvelashisexcessively
small
④Inspecttheairtightnessbetweenvalve
andvalveseat.
⑤Inspectifthepistonringisfractured,
clampedintheringslotorhas
poor
elasticity
⑥Inspecttheabrasionofpistonringand
Inspecttheidle
speedbypass
channelofthrottle
valvebody
Cleanidlespeedbypassairpassage
Noidlespeedaftercleaning
Inspectwiththefailurediagnostictester