1. GENERAL INFORMATION Pulsar CK 125 POOR PERFORMANCE (ESPECIALLY AT IDLE AND LOW SPEEDS) Inspection/Adjustment Symptom Probable Cause Check ignition timing Faulty CDI unit Correct Incorrect Faulty pulser coil Check carburetor air screw adjustment Mixture too lean (turn screw in) Correctly adjusted Incorrectly adjusted Mixture too rich (turn screw out) Check carburetor gasket for air leaks Faulty intake manifold gasket Carburetor not securely No air leak Air leaks tightened Damaged insulator rubber Broken vacuum tube Remove spark plug and install it into spark plug cap to test spark by making it contact the engine Faulty or fouled spark plug Weak or inter- Faulty CDI unit Good spark mittent spark Faulty A.C. generator Faulty ignition coil Faulty ignition switch Check A.C. generator Faulty A.C. generator Good Faulty Damaged vacuum tube Clogged air vent hole 1-18