Wait until the engine is completely cool before beginning to work. It should be room temperature when you begin.
Remove the seats. Use your wrenches to remove the bolts holding the seats in place. Take the seats off and set them aside.
Remove fuel hose and fuel tank. Make sure that the fuel selector is off when you do this. Keep a rag handy to wipe up fuel that may fall from hose as it is being removed. Fuel tank is removed by undoing the bolts that are on it.
Remove the spark plugs. Some models will allow you to simply disconnect these whereas other models require complete removal.
Remove the air intake box. This is connected to the carburetor by hoses. Detach all of the parts that are keeping it connected and set it aside.
Remove cables. The starter cable and throttle cables should all be removed at this time.
Remove the ignition coil starter plugs, all covers (such as sprocket covers and cylinder head covers). Now that all of the parts are removed you are ready to measure your valve clearance in order to adjust the valves.
Go through the straight plug access port with your 22mm-deep socket. Use it to turn the crankshift clockwise. Turn until the hole on the camshaft sprocket points top dead center (TDC). To do this, you align the T1 mark on the rear cylinder and the 1 mark on the front cylinder with the pointer gap. You can see the alignment by looking through the rotor port.
Insert a thickness gauge. It goes between the adjusting screw and the valve tip. Do this on the intake and exhaust valves to measure their clearance.
Check this measurement against the desired valve adjustment levels for your model. Your manual will provide information about the desired valve adjustments depending on the motorcycle model that you have.
Turn the tappet locknut until it is loose.
Re-insert your thickness gauge as you did before.
Turn the adjusting screw until the correct measurement is obtained.
Tighten the locknut. Double check with your thickness gauge to make sure that you've done this correctly.
Repeat all of these steps through all four cycles. Repeat for both front and rear cylinder valves.
Double check your work one final time using your thickness gauge.
Reinstall all parts by putting the machine back together in the reverse of the way in which you took it apart.
