FUEL SYSTEM PROBLEM, CARB. SPUTTERS AT HIGHWAY CRUISING SPEED. NEW STAGE 1 INTAKE. V&H EXHAUST. REJET OR OTHER PROBLEM?

[mleach72]

View attachment 125401

That's the bowl. The plug is in the main body of the carb.

 

[mleach72]

I'm sitting at the local VFW, and I'm slightly intoxicated, so take it FWIW. These are the exact problems why I switched to mikuni. The S&S carb is a good carb, but there are just too many variables that depend on each other.

 

[QMChief]

Found the plug. It's out now. What can I expect from the plug being removed? If it's increased fuel, I'll have to jet for that.

 

[mleach72]

Found the plug. It's out now. What can I expect from the plug being removed? If it's increased fuel, I'll have to jet for that.

Are you running open pipes?

 

[QMChief]

V&H pipes. Not sure if they are considered "open". I'm going to wait on the rebuild kit and my ratchet extension so I can tighten up the pipes for the last time. I.m going to use the standard jets too just in case it was the pipes being a little loose or the filter leaking air somewhere. I'll give you guys a hollar once I take her for a ride (GULP) in a couple of days after I get the rebuild kit in.
Someone chime in on that plug I removed. What will it do for the carb????

 

[mleach72]

V&H pipes. Not sure if they are considered "open". I'm going to wait on the rebuild kit and my ratchet extension so I can tighten up the pipes for the last time. I.m going to use the standard jets too just in case it was the pipes being a little loose or the filter leaking air somewhere. I'll give you guys a hollar once I take her for a ride (GULP)

If there are no baffles in the pipes, try moving the air bleed up to a 60.

 

[QMChief]

WHAT DOES REMOVING THE AUXILIARY PLUG ON THE SUPER G CARB DO FOR THE CARB OPERATION???

 

[Mr. Wright]

It balances the air inside the carb with the out side air. I'm sure there are more technical terms for it.

 

[QMChief]

So it vents for easier fuel flow I assume. Do you think my pipes being less than tightened could cause my dark plugs? I'll take her out in a couple of days after rebuilding the carb as best I can and tightening the pipes to torque specs in the manual. I'm going back to my teardrop filter and if she runs good I'm not touching another stage one filter kit! If my plugs continue to look dark I guess I'll have to jet down one size in the intermediate jet. I won't understand why though if I'm using the common jets right now.

 

[QMChief]

S&S sheet says 078 main is standard, I had a 076 in it. Not sure if it caused problems or not but I'm going with a 078 if you guys think thats a good move.

 

[QMChief]

Found the plug. It's out now. What can I expect from the plug being removed? If it's increased fuel, I'll have to jet for that.

No, V&H has baffles and they stayed in.

 

[mleach72]

No, V&H has baffles and they stayed in.

Then the stock .040 air bleed should be fine. You are running a very common set up. A 31 intermediate should be fine. You might need to move the main jet up to a 78, but that shouldn't have any effect when you are cruising. If you continue to run rich, try the 295 intermediate. I've never heard of a 117 needing that, but anything is possible.

 

[john sachs]

Before putting the cart before the horse, check your timing, and advance curve. Get that right, and then start with your jetting. Early S&S carbs, with a fixed air jet can easily be modified to accept a mirad of air jet sizes. Later S&S carbs, have a removable air jet, that can be drilled, or replaced with different sizes.
John

 

[QMChief]

I don't know how to ride that horse John! I haven't messed with timing since my first car. How do I do that?

 

[mleach72]

I don't know how to ride that horse John! I haven't messed with timing since my first car. How do I do that?

That's good advice from John, but unfortunately on the '05 and later bikes, the ignition timing is locked into the stock Thunderheart ignition module and can't be altered. To change the timing, you have to get the Thunderheart adjustable ignition.

 

[QMChief]

Guys I gave in. I couldn't resist getting a black Super G rebuilt by S&S for $450. At my age, the more tinkering I can avoid, the more time I get on the bike.
This brings it's own set of problems. The jets included aren't going to match my 117 so if you guys could walk me through the jetting for this new carb. I can't ride and test with the stage 1 air filter since I would continuously be removing the cv carb adapter and gaskets each jet change. I obviously would need to start with the stock 117 jets. I'll attach a pic so you can see what I'm starting with. mleach72 and Mr Wright have earned all the food and drinks they can inhale when our paths cross, anyone else wanting to join the carb party will earn my respect as well.
Right now going through the posts I need a 040 air bleed, 031 intermediate, 078 main, and I'm missing one more. Do you guys recommend starting with the auxiliary plug out? The carb install should only take a day (for me and my back less for you guys)

 

[mleach72]

Guys I gave in. I couldn't resist getting a black Super G rebuilt by S&S for $450. At my age, the more tinkering I can avoid, the more time I get on the bike.
This brings it's own set of problems. The jets included aren't going to match my 117 so if you guys could walk me through the jetting for this new carb. I can't ride and test with the stage 1 air filter since I would continuously be removing the cv carb adapter and gaskets each jet change. I obviously would need to start with the stock 117 jets. I'll attach a pic so you can see what I'm starting with. mleach72 and Mr Wright have earned all the food and drinks they can inhale when our paths cross, anyone else wanting to join the carb party will earn my respect as well.
Right now going through the posts I need a 040 air bleed, 031 intermediate, 078 main, and I'm missing one more. Do you guys recommend starting with the auxiliary plug out? The carb install should only take a day (for me and my back less for you guys)
View attachment 125484View attachment 125485View attachment 125486View attachment 125487

Yeah, 31 and 78 are probably the most common jets, but every bike is different. Just follow the tuning manual. You can remove the plug. It makes no difference. It just creates a different pathway for air to get in and out of the bowl if the main vent is blocked. The main jet can be changed by just removing the bowl drain plug.

 

[DynoDave]

Should work!
Too bad XXX Carburetors is gone (Bob Maltz died).
He made some killer Super G modified carbs.
Gave him my engine and exhaust specs and when I received the carb it was dialed in!

 

[QMChief]

Should work!
Too bad XXX Carburetors is gone (Bob Maltz died).
He made some killer Super G modified carbs.
Gave him my engine and exhaust specs and when I received the carb it was dialed in!
View attachment 125505

I remember those. Almost pulled the trigger a couple of times, but always nervous about the install and configuration. Now it's a mandatory replacement, my old carb is in bad shape. HE MADE SOME BAD ASS CARBS

 

[QMChief]

Can you guys save me a test ride?
OLD CARB= 076 main (078 is stock for 117), auxiliary plug was still installed, excellerator pump was in bad shape plugs dark, stage 1 air filter, V&H exhaust.
NEW CARB= new excellerator pump, 078 main, pulling out auxiliary plug, new Moroso plug wires, would like to use stage 1 filter but for testing just putting teardrop back on. V&H exhaust.
Should I start with 031 intermediate or start out with next higher intermediate?