3. INSPECTION/ADJUSTMENT GRAND DINK 250 Bolts VALVE CLEARANCE · Inspect and adjust valve clearance while the engine is cold (below 35). Remove the cylinder head cover. Cylinder Head Cover 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 Mark 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 Adjuster · Check the valve clearance again after the lock nut is tightened. Feeler Gauge CARBURETOR IDLE SPEED Throttle Stop Screw · 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: 1700100rpm When the engine misses or run erratic, adjust the pilot screw. Pilot Screw 3-6