PERIODIC MAINTENANCE AND MINOR REPAIR6-106EAU01315Panel DTo remove the panelRemove the screws, and then take thepanel off.To install the panelPlace the panel in the original position,and then install the screws.EAU04506Panels E and FTo remove one of the panels1. Remove the seats. (See page 3-12for seat removal and installationprocedures.)2. Remove the screws, the quick fas-tener screw and the quick fasten-ers, and then take the panel off.To install the panel1. Place the panel in the original po-sition, and then install the quickfasteners and quick fastenerscrew, and tighten the screws.2. Install the seats.EAU01880Checking the spark plugsThe spark plugs are important enginecomponents, which should be checkedperiodically, preferably by a Yamahadealer. Since heat and deposits willcause any spark plug to slowly erode,they should be removed and checkedin accordance with the periodic mainte-nance and lubrication chart. In addition,the condition of the spark plugs can re-veal the condition of the engine.The porcelain insulator around the cen-ter electrode of each spark plug shouldbe a medium-to-light tan (the ideal col-or when the motorcycle is ridden nor-mally), and all spark plugs installed inthe engine should have the same color.If any spark plug shows a distinctly dif-ferent color, the engine could be defec-tive. Do not attempt to diagnose suchproblems yourself. Instead, have aYamaha dealer check the motorcycle.If a spark plug shows signs of electrodeerosion and excessive carbon or otherdeposits, it should be replaced.1. Screw (× 3) 1. Screw (× 2)2. Quick fastener screw3. Quick fastener (× 3)