Howdy, I’m brand new to HD, everything else ive owned has been Japanese so I apologize in advance if I don’t understand how HD does things.


I just bought a 96 wide glide and it has a vacuum operated hypercharger on it so naturally it has some issues with running. Going down the road it runs like a champ, doesn’t stumble or pop (much). Now when you come to a complete stop, if I don’t hold the throttle open slightly the engine will die out as soon as I hit the clutch. I’ve noticed that on decel the butterfly valves are completely closed obviously as vacuum is high.

I’ve come to the conclusion that I need to remove this object. I was reading the destructions about installation and see that it tees off vacuum from ignition advance which could be contributing to my issues. Do these older Evos run anything else off of vacuum besides the ignition advance? I’ve got a big sucker and intake seals on the way but I’m also sending it off this week to have the cam bearing done

 

Stock petcock is vacuum operated

By all means ditch the "Hypercharger" !!

 

And ditch the stock vacuum petcock for a Pingel and you not experience those issues!

 

Nothing wrong with a Pingel but you can delete the vacuum feature of the stock unit in about 15 minutes for zero $

 

You can also gut the butterflies from the hyper charger , seeing as they do nothing, but cause issues. Then plug the vacuum line.

 

that was my goal at lunch today, there’s also a cover for quick air filter change, I might pull that off too.

 

Thanks for th tip, I’ll check it out, trying to eliminate as many weak points as possible

 

Gutting the butterflies helped tremendously! As soon as I took off on the road the vacuum line popped off which is probably why it kept bogging down when I came to a stop.

thanks everyone!