Hypercharger / Carb Problems

hey glenn, welcome to the forum.. i will try to help....the stream of gas from the acc.pump should be hitting the needle directly in the center of it.....not off to one side or the other.....it can be adjusted by carfully twisting it in the direction it needs to go.....let us know how you make out........
chuck

I've seen this on a few hyperchargers and I have a theory (though not tested). At a given speed air flows into the hypercharger body and out through the back side where there is an opening. It's possible that a suction is created drawing fuel out of the carburetor back into the air cleaner. On a previous bike I had this was occurring, so I glued a piece of mesh (from an aquarium filter) across the inside of that rear opening. This reduced the amount of air blowing thru from front to back, and stopped the fuel buildup along with reducing oil being drawn in through the breathers.

Another cause for fuel spraying backward out the carb commonly has to do with exhaust reversion. When an exhaust pulse is allowed to pass back into the exhaust port its possible to continue to push all the way through the carburetor. Open pipes in combination with other components are prone to this, and just the right combo can make it worse. IMHO thunderslides often add to such problems.

One last thing to check... I've seen my share of thunderslides where the needle gets cocked of fails to fall into the closed position. This will allow fuel to spray up out of the emulsion tube unmetered.

ken, your theory has good merit....didnt know the hypers were "flowthrough"...

The Hyperchargers work well but can have that "blow-thru" effect at high speed. What I like about them is they draw air from in front of the bike rather than from the engine side, giving you a true cool air system. I haven't looked at the new models so perhaps they already altered how air could blow thu from front to back. That opening on the rear-facing side is to allow air to enter when the flaps are closed.

Had the Hypercharger Pro series on my 95 inch motor never had a problem, Mike Rowland plays on HTT occasionally, they do work for many reasons, one is the larger filter area.

You can disconnect the flapper doors from the vac line and they will stay open all the time. No big deal.

I like the look kinda like a pro street car with the blower going through the hood, that's kool!

You can compare a standard Hypercharger to the SE kit in Flow ability, the pro flows more.

The spray from your accelerator pump nozzle shouldn't be hitting the slide, but instead right under it as it lifts. There could be a couple things happening here.

1. Slide isn't rising correctly. Check if it has carbon buildup along the channels. Also check that the rubber diaphram is not pinched or cracked.

2. Nozzle is obstructed or damaged. Is the nozzle stock or the replacement version? A small amount of debis in the nozzle could cause the spray direction to be directed too far upward. It should spray directly down the lower center of the venturi. If the nozzle needs replacement let me know and I'll post directions on how to replace it.