Shorty "E" adjustment...

[HOG]

Got an S&S 92" with Shorty "E". I have baffled Big Dog pipes that are stock with stock S&S air cleaner and housing. Carb adj are:

1 1/4 idle air
2 Turns out on Accel Pump
1/2 out Ilde

The above adj's were made with the engine warm.

Had a lot of decel pops with the stock .0295 intermediate jet, was also 3 1/2 turns out on the Accel pump. Went to a .031 with better results.

I now have infrequent back fires when I restart the engine HOT and have popping when throttle is advanced off idle. After a 1/2 mile or so the engine smooths out and runs good with some popping on decel.

I was told from the local shop that a .031 intermediate jet should be big 'nuff for my set up.

My gut feeling is I need to keep stepping up to a larger intermediate jet until this problem goes away?

I think I may have answered my own question...maybe I missed something?

This is a homebuilt bike with 1868 miles to date...I know you guys run S&S from your manufacture and may have a trick or too to share.

 

[Raywood]

Got an S&S 92" with Shorty "E". I have baffled Big Dog pipes that are stock with stock S&S air cleaner and housing. Carb adj are:

1 1/4 idle air
2 Turns out on Accel Pump
1/2 out Ilde

The above adj's were made with the engine warm.

Had a lot of decel pops with the stock .0295 intermediate jet, was also 3 1/2 turns out on the Accel pump. Went to a .031 with better results.

I now have infrequent back fires when I restart the engine HOT and have popping when throttle is advanced off idle. After a 1/2 mile or so the engine smooths out and runs good with some popping on decel.

I was told from the local shop that a .031 intermediate jet should be big 'nuff for my set up.

My gut feeling is I need to keep stepping up to a larger intermediate jet until this problem goes away?

I think I may have answered my own question...maybe I missed something?

This is a homebuilt bike with 1868 miles to date...I know you guys run S&S from your manufacture and may have a trick or too to share.

Tighten up your exhaust pipes

 

[HOG]

I'm tight baby...:lol:

 

[lee]

some popping (after fire) on decel is not necessarily a sign something is wrong. You could have have your carb dialled in spot on. After I had my bike dyno'd there was a lot more afterfire than there was before.

 

[HOG]

I reset everything to factory settings and warmed the engine. I adjusted the Idle air with the accelerator pump off. Then dialed in the accelerator pump. Runs good but still get pops from time to time...guess its just the nature of my beast.

 

[Jones]

Yea it pops

You can try making your mixture a tad richer. Some have sucess with this....I do. One of the Major Domos on this site soldered a Dime (10 cent piece) in the slot of the mixture screw to fine tune the circuit easy. I did that too and I like it. I will teel you this...the afterfire kinda grows on you. I like it now. All the perfectly tuned formula, can am cars and GP bikes hard off throttle pop like that. I think it is difficult to remove it 100%. Some have switched to the Mikuni set up and have no pop at all.

Regards Juice

 

[barhopper]

Have you tried a bigger main?

 

[HOG]

Juice - Thanks for the tip...I'll keep it in mind

Barhopper - The transition from intermediate to main is seamless. My problems seem to be just off idle to around 2000 grand (no tach; just guessing)

 

[Raywood]

Juice - Thanks for the tip...I'll keep it in mind

Barhopper - The transition from intermediate to main is seamless. My problems seem to be just off idle to around 2000 grand (no tach; just guessing)

Don't know where you are located but a .295 on a 92 cu in is pretty big!!!! I'm running a .295 on my 117 with a 72 main and mine still runs rich.

You may be bogging it down with fuel. Just my 2 cents

Best bet is a dyno with fuel analyzer to be sure of your jets.

 

[HOG]

Raywood - I talked to the folks at S&S. They use the 295 to overcome the EPA regs. They asked me how many turns out I was on the accel pump with the 295 to prevent stumble-on off idle...I was at 4 1/2 turns out. The rep said I needed to go to 31 or 32. Sure 'nuff after the 31 was installed I was able to prevent stumble-on off idle with about 2 turns.

I was also getting close to 50 mpg with the 295; probably too lean. With the 31 I'm running closer to 42.