Suzuki RM-Z250 - Carburetor; Radiator (Cooling System)

3-6 TROUBLESHOOTING
CARBURETOR
RADIATOR (COOLING SYSTEM)
Complaint Symptom and possible causes Remedy
Starting difficulty. • 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
—
—
Clean
Adjust
Adjust
Clean or replace
Retighten or replace
Idling or low-speed
trouble
• Maladjusted pilot screw
• Clogged slow jet or air passage
• Clogged main nozzle or air passage
• Sucking air from intake pipe
Adjust
Clean or replace
Clean or replace
Retighten or replace
Medium or high-
speed trouble
• Clogged main jet
• Worn down jet float or main nozzle
• Clogged main nozzle or air passage
• Improperly working throttle valve
Clean or replace
Clean or replace
Clean or replace
Adjust
Overflow and fuel
level fluctuations
• Worn or damaged float valve
• Foreign matter on the float valve
• Broken float valve spring
• Improperly working float
• Incorrect float chamber fuel level
Replace
Clean or replace
Replace
Adjust or replace
Adjust float height
Complaint Symptom and possible causes Remedy
Engine overheats • 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
Add coolant
Clean
Clean
Bleed air
Replace
Replace