Coasters
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- billh1943
- 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.
Coasters:
- 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.
NOTE: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.
NOTE:
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 Accessories International