3. INSPECTION/ADJUSTMENT GRAND DINK 125/150 When the engine misses or run erratic, adjust the pilot screw. Bolts VALVE CLEARANCE · Inspect and adjust valve clearance while the engine is cold (below 35). Remove the cylinder head cover. Cylinder Head Cover "T" Mark Turn the A.C. generator flywheel to the top dead center (TDC) on the compression stroke so that the "T" mark on the flywheel aligns with the index mark on the left crankcase cover. Top Dead Center Inspect and adjust valve clearance. Valve Clearance: IN: 0.1mm EX: 0.1mm Loosen the lock nut and adjust by turning the adjusting nut Special Valve Wrench · Check the valve clearance again after Feeler Gauge Valve Wrench the lock nut is tightened. CARBURETOR IDLE SPEED · The engine must be warm for accurate idle speed inspection and adjustment. Lift up the seat and remove the inspection cover. Warm up the engine before this operation. Start the engine and connect a tachometer. Turn the throttle stop screw to obtain the specified idle speed. Idle Speed: 1700rpm Throttle Stop Screw Pilot Screw 3-6