Carburetor; Radiator (Cooling System) - Suzuki RM-Z250 Owner's Service Manual

3-6 TROUBLESHOOTING

CARBURETOR

Complaint
Starting difficulty.
Idling or low-speed
trouble
Medium or high-
speed trouble
Overflow and fuel
level fluctuations

RADIATOR (COOLING SYSTEM)

Complaint
Engine overheats
Symptom and possible causes
• Improperly working starter knob
• Improperly working hot starter lever
• Clogged starter jet passage
• Maladjusted pilot screw
• Maladjusted throttle stop screw
• Clogged slow jet or air passage
• Sucking air from intake pipe
• Maladjusted pilot screw
• Clogged slow jet or air passage
• Clogged main nozzle or air passage
• Sucking air from intake pipe
• Clogged main jet
• Worn down jet float or main nozzle
• Clogged main nozzle or air passage
• Improperly working throttle valve
• Worn or damaged float valve
• Foreign matter on the float valve
• Broken float valve spring
• Improperly working float
• Incorrect float chamber fuel level
Symptom and possible causes
• Not enough engine coolant
• Radiator core clogged with dirt or scale
• Clogged water passage
• Air trapped in the cooling circuit
• Defective water pump
• Use incorrect coolant
Remedy
—
—
Clean
Adjust
Adjust
Clean or replace
Retighten or replace
Adjust
Clean or replace
Clean or replace
Retighten or replace
Clean or replace
Clean or replace
Clean or replace
Adjust
Replace
Clean or replace
Replace
Adjust or replace
Adjust float height
Remedy
Add coolant
Clean
Clean
Bleed air
Replace
Replace