S&S Super B Mid Range Flat Spot Shovelhead

[Dragstews]

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[JBinNC]

Alright I ordered a set of smaller drill bits and will try opening up the main air bleed to .060 – also planning on trying the lollipop in the pipes trick. I'll check back in once I get it together. Thanks!

Go up on your air bleed size in increments. Because it is an air jet, a change of .004 - .006 is reasonable. You may not have to go to .060, or you may need to go larger. Just part of tuning.

Jim

[brooklynbomber]

if you want to dump the flat spot put some lolly pops in the pipe, then if you still have flat spot after tuning carb play with air bleed

This helps quite a bit. You can use an eyelet or thumb turn screw. There’s even an optimal angle for them that you can dial in on your bike. I’ve found that a 45 degree angle is pretty nice! I’ve done it on every bike with drag pipes.

[HogsRear]

This helps quite a bit. You can use an eyelet or thumb turn screw. There’s even an optimal angle for them that you can dial in on your bike. I’ve found that a 45 degree angle is pretty nice! I’ve done it on every bike with drag pipes.

I actually made a pair with hardware I had laying around and installed them in some new pipes today. I currently have them at a 90 degree angle in the pipe but maybe I should try tilting them a bit like you say.

[70fatster]

I had a flat spot with my sporty and the super E.
I made an adjustable bleed with an idle needle and some brass rod, and drilled and tapped the carb like you would do for the screw in type jets.
It worked perfectly, but the spring on the needle isn't quite tight enough, so it sometimes needs readjusting. No problem though, I usually noticeit pretty quick and can hold the throttle with my left hand and reach down with my right hand and dial it right in. IMO the carb is too big for my 900.

[Dragstews]

A S&S Cycle "GBL"
Carburetor would be better suited to your model ...

[HogsRear]

Potentially dumb question. I picked up another B for cheap so I figured I would clean it out and see if it was any different. Are these two holes in the bowl supposed to connect? The other side of the bowl has a matching pair of holes with a slightly larger opening clearly connects but this seems blocked.

[JBinNC]

Yes, those two holes connect, same on both sides of the bowl. One is the intermediate jet well, and the other is the enrichener tube well. The hole at the bottom of the enrichener tube well is small, and acts as a jet to meter fuel to the enrichener. The intermediate jet well has a larger hole serving it, with the jet serving as the jet.

Jim

[HogsRear]

Yes, those two holes connect, same on both sides of the bowl. One is the intermediate jet well, and the other is the enrichener tube well. The hole at the bottom of the enrichener tube well is small, and acts as a jet to meter fuel to the enrichener. The intermediate jet well has a larger hole serving it, with the jet serving as the jet.

Jim

Thank you Jim! I figured it's there for a reason, but right now it's definitely blocked. I believe this is the enricher side. I blew it out with compressed air and have been poking at it with a pick but doesn't seem to be connecting. It almost seems like the small hole on the inside of the bowl just isn't deep enough, but I'm going to keep at it.

[JBinNC]

It's small. I use one strand from stranded electrical wire to probe those holes, and small holes like intermediate jets. Solvent and air pressure will get it eventually.

Jim