This guide will show you how to remove the entire Intake Air Control System (Flapper Valve System.) The parts removed will included the vacuum tank, solenoid valve, diaphragm and hoses pictured in Figure 1. We will also remove the Intake Air Duct Valve assembly pictured in Figure 5.
	To begin, remove the upper fairing. Then disconnect the BARO sensor connector and remove the four screws along with the intake duct A (Figure 2).
			Next, remove the vacuum tube from the air duct valve control diaphragm (Figure 3). We'll be throwing this tube out in a few minutes.
	Turn the diaphragm counterclockwise and remove it from the air intake B. Unhook the diaphragm rod from the air duct valve and remove the diaphragm (Figure 4).
			Now we can remove the Intake Air Duct Valve or Flapper (Figure 5). Begin by removing the screw and plug in Figure 6. Next, remove the valve pin by wiggling the Intake Air Duct Valve (the bike must be on it's side stand for the pin to fall out (Figure 7).
	Now it's time to modify the diaphragm. The new diaphragm replacement can be purchased from Dan Kyle Racing (831) 394-1330 for approximately $20. I prefer his replacement cover as it used the stock retainer to hold it in place. Just grind off the studs that are holding the clip in place by using a bench grinder or hand grinder (Figure 8). Then attach the clip to the new cover provided by Dan Kyle (Figure 9).
			Finally, reinstall the diaphragm replacement cover in a clockwise motion until it comes to a complete stop. (Figure 10) Now we'll move on to the Solenoid Valve removal. Remove the right radiator (or at least loosen it enough to get behind it a bit.)
	Now disconnect the connector and vacuum tubes from the solenoid valve (Figure 11). Remove the mounting bolt, nut and the solenoid valve from the stay. Both these tubes can now be discarded.
			To remove the Vacuum Tank, first disconnect the vacuum tubes from the tank. Then you are free to remove the mounting bold, nut and the vacuum tank from the stay (Figure 12). The vacuum tube that was connected to the solenoid can be discarded, but the other tube (which is connected to the throttle body) needs to be plugged. A small screw works good for this.
	Now reassemble your bike and the job is finished.
		Guide by Troy Gwin Parts available from Dan Kyle Racing (831) 394-1330