I did clean the filter, thanks for the suggestion though.

Well,.. keep the Raptor on it... it's eliminating one possibility...

In fact,.. the only remaining possibility is the small screen under the float needle...
Pull the float needle and clean the screen...
Quote:

... the bowl empty's,.. and then flow is slow...
... if tank is venting and Raptor is installed,.. only float needle screen remains to slow that flow...

I have done the screen filter also.

Will test ride again tomorrow and see what occurs...

Fill up your tank, then time how long it takes to flow fuel out the drain in the carb.  I will do the same with mine and we can compare flow rates.  The drain at the bottom of the float bowl is small, so the flow rate should be less than it is from the petcock.

When I tested my Raptor it took 2 minutes, 15 seconds to flow a gallon of fuel when in the "ON" position.  I expect the float bowl drain to require significantly more time - as the drain hole is small.

Is there anyway you can post a picture of the carb you are working on?  This would help confirm what carb you have......no plastic floats have ever been seen on a Savage.

justin_o_guy2 wrote on 10/23/12 at 08:05:13:


I fixed that......2 minutes and 15 seconds to flow a gallon.  That is with a full tank.....the last gallon takes a long time when the fuel level is not flowing into the full height of the little filter on top of the petcock tube.

 
When he capped off the charcoal canister bleeder line to his California gas tank he blocked the "gasoline replacement" air flow into his tank.  

California gas caps don't have vent holes.

Somebody give him a hole size and a location to drill it in his gas cap so he has a vented gas cap.

A Raptor doesn't flow in any form of "restricted fashion" if the tank is properly vented.  It can't flow but in full flow unless the fuel lines are kinked.

Are his fuel lines thick fiber reinforced rubber or are they built of something flimsy that is flexible and can pinch itself off at a bend point?  

Dave found out the hard way why we keep saying use thick nylon fiber reinforced rubber fuel hose (you have a very hard time getting the necessary gentle bends in hose like that to pinch itself off, ever).

Next, get him to read the information imprinted on that carburetor and post it -- our stock carb has never used "an all plastic float assembly", ever.

For what it is worth from a Nooby, but I did not see where the fuel line had been replaced from the new Raptor to the carb in the tread.  I just had this happen to me yesterday my bike lost power after a five run at 60 MPH.  First thought was the stock petcock and the issues I have seen here.  I had added an aftermarket in line fuel filter, so I knew I would have to remove that before taking it to the Dealer.  Had issue with him before on changes made while under warranty.

Replaced the line and started to the Dealer.  No issues with the bike diverted from that mission and rode around still nothing.  Got home and split the old fuel line length wise and found what we call a flapper in the line.  This is where the inner layer separates from the hose and with higher flow rates will act like a check valve and shut off or greatly reduce the fuel flow.  When you stop the engine the flow stops or slow the flow down with lower RPM and the flapper gets out of the way for a period of time until high flow returns and then it will drop down into the fuel flow again causing issues with low fuel flow and starvation to the engine.

I have seen this happen in my 30 years in the world of HHP diesel engines in the oil field, but had never had it happen to any of my POVs before.  Never too old to be screwed in a new way.  I have seen the flapper issue drive new a technician to the verge of insanity in the oil field.

Thanks Fella's.

I have run an oversize tube from the gas vent pipe down to the underside of the bike, so the tank should breath freely.

The fuel line is a good rubber fuel variety and is not kinked or has any flapping material inside.

Took her for a spin again yesterday and it ran at 90mph for as long as I dared without getting a ticket....absolutely no sign of missing or cutting out...continued to cruise at on the highway at 70 ish and no problems.

Its running like a dream at the moment....strange but true.

I would love to have found a definitive reason for this...I am confident that the emissions cannister being full of gas was causing the running problem initially, along with the very lean running.

The cutting out at speed was a mystery but at the moment is gone.