1. GENERAL INFORMATION GRAND DINK 250 POOR PERFORMANCE (AT HIGH SPEED) Inspection/Adjustment Symptom Probable Cause Check ignition timing Faulty CDI unit Correct timing Incorrect timing Faulty A.C. generator Check valve clearance Improperly adjusted valve Correctly adjusted Incorrectly adjusted clearance Worn valve seat Check fuel pump for fuel supply Empty fuel tank Fuel flows freely Fuel flow restricted Clogged fuel tube or filter Faulty fuel pump Cracked fuel pump vacuum tube Check carburetor jets for clogging Not clogged Clogged Clean and unclog Check valve timing Correct Incorrect Cam timing gear aligning marks not aligned Check valve spring tension Not weakened Weak spring Faulty spring 1-20