- On decel the VSV #13 is activated by way of VH #19.
- The VSV #13 draws air from the air box via hose #6.
- The air then flows thru hose #3 and #15 to the ASV's & RV's
which forces the air into the exhaust to help burn off any unburned gases from the cylinders.
- Plates to cover and seal the holes where the ASV's were.
- Removing the ASV's & RV's from each cylinder and installing Coasters will usually stop any popping and cracking in the exhaust on decel...
especially with after-market pipes...unless, of course, there is some other problem.
- Disabling this mess supposedly makes the engine run a little cooler also.
- Some guys just leave this complete assy in place and disconnect the two large hoses from the ASV's & RV's and plug the ends with marbles.
- I chose to remove all that mess myself. It doesn'st take much time to remove it
then plug the hole in the back of the right side air box with a plug...
I used a cork shaped rubber plug with a little RTV to make a good seal.
- I just lifted the front of the gas tank to do the job. Not much to it.
When removing this stuff, it does not help or hinder the performance of the engine, meaning more or less HP. And no adjustments are necessary.
This is EPA stuff.
Vacum hose = VH - #19
Vacum Switch Valve = VSV - #13
Air Suction Valve & Reed Valves = ASV & RV - #'s 22 & 25 (Reed Valves are inside the ASV's.)
Available from Scootworks