Hi

i recently installed a new Pro R Hypercharger Model #9322 on a 2003 Harley Davidson Springer Softail FXSTS,

when i run the engine the butterfly valves go from fully open (engine off position) to 3/4 closed on idle & are very unresponsive to any throttle movement, also when the butterfly valves do move they are very slow & almost stiff in response, on the road (under load) they are a little better but nothing like what i would expect, when the engine is running they are hard to move by hand, but when the engine is off they move freely, i have checked all the lines to be sure they are correctly installed & hold vacumm which they are, also checked the vacumm line from the fuel tap which holds vacumm very well,
 just wondering if you have any ideas

Its fine mate, thas how it should be. Dont try forcing the butterflys when its running though.

mate, sorry for the stuff up. I have just ran mine to check and the butterflys move easily when the engine is running. They respond immediately and freely with throttle.

Mate, If u want me to check anything on mine against how it is on yours let me know

Mate, mine is a 97 EVO and yes I rejetted the carb etc. I have just taken the hose off the vacuum pod and yes there is no resistance....if u suck u can hear it draw thru the air cleaner. I cant check the other for u without taking the Hypercharger off mate. FYI, I did run mine exactly how it is in pic 10 but I dont think there would be to much of a difference unless the line was crimped somehow

Cheers Hound Dog, i have sent Kuryakyn an email, so maybe they can provide more ideas (maybe a prob with the unit itself)

 

thanks for your help mate

Casper, I have the Hyper on my bike and I know that if the screw at the back of the vacuum pod is not set correctly then it will affect the operation of the butterflies. If the screw is in to far then they will not move freely. Basically take the cleaner off the bike and adjust the screw so that the butterflies when closed open up approx 1/8" You need to hold the butterflies closed with one hand and adjust the screw with the other. You will feel the pressure on the screw and butterflies when you adjust the screw . While you have it off also check for free running vacuum rod and that the butterflies are not binding anywhere in their housings. Also check the vacum housing screws are not letting in air when it is operating. Once you have put it back on the bike just run the engine and see ho they go.

AJ56, thanks for your reply, i took the charger off the bike & wound out the screw on the vacumm pod all the way, put back on & it works a lil better than before, could not understand all your advice though, when bike is off (not running) are the butterflies closed or open?

When the bike is not running the butterflies will be fully open due to no vacuum from the engine. To adjust the butterflies the AC should be off the bike. 1. Hold the butterflies in the fully closed position. 2. Screw the adjusting screw in so that the butterflies are opened up approx 1/8". As you screw in the screw you will feel pressure as the screw contacts the butterfly vacuum assy. Keep screwing in as you hold the butterfly's closed until you get the gap. Once you have that lock up the adjusting screw with the lock nut and that is all the adjustments that you need to do. Whilst you have the AC off it may pay to check the vacuum diaphragm inside the cleaner body. There should be 3 screws that hold the assy onto the AC body. The Diaphragm will be under pressure due to a spring so be careful when you dismantle the ac body so not to loose any parts. Check the the rod that actuates the butterflies is free moving also. Mine actually flickers back and forth whilst at idle, The on acceleration it opens up. Personally I think it should be the other way around, Closed when not running and then opens as you ride the bike. In the end they just look good though and I doubt they make one iota of difference to the bike over other free flow AC's