Yamaha RD125C Servicehandbuch Seite 292

B. Poor idle and/or low speed Performance
Possible Cause
Remedy
Ignition System
Spark plug fouled or incorrect gap Clean or correct gap. or replace
if necessary.
Contact points bad Clean or correct gap, or replace
if necessary. Reset timing.
Ignition timing incorrect
Reset timing.
Weak spark
Check ignition coil and condenser.
Air/Fuel Systems
Tank cap vent plugged
Clean or repair as necessary.
Fuel petcock plugged Clean or repair as necessary.
Carburetor slow speed System
inoperative
Clean or repair as necessary.
Pilot screw improperly adjusted or
plugged
Clean or repair as necessary.
Carburetor float level incorrect Measure and adjust if required.
Starter lever on or leaking Check or repair as necessary
Air leak
Check or repair as necessary.
Carburetor not level
Check or repair as necessary.
Engine/Exhaust Systems
See " N o Start".
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C. Poor mid-range and poor high speed Performance
Possible Cause Remedy
Ignition System
Spark plug incorrect
Clean or correct gap or change plug
if necessary.
Spark advance defective (RD200(B))
Check for correct "retard" to
"füll advance" position.
Ignition timing incorrect Reset.
Points set too close
Regap. Reset timing.
Air/Fuel Systems
Dirty air filter element Clean.
Carburetor float level incorrect
Measure and adjust if required.
Incorrect main jet size
Remove jet and check size.
Incorrect jet needle notch
Check position of needle clip.
Cracked or leaking reeds
Replace.
Carburetor not level
Level.