s&s carb adjustment

cjantdad · #1 04-20-2008, 11:14 PM

Hi i'm jim and this my first harley so i know i've got a lot to learn can anyone tell me how to adjust my carb

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badinfluence63 · #2 04-21-2008, 04:15 AM

Hello Jim and welcome to HDF.

What exactly is the problem?There's a couple different way to go about this depending on what the problem is. This should help:

http://www.millerscustomparts.us/sho...tuningtips.htm

Rodney · #3 04-21-2008, 08:59 AM

Welcome to the HDForum Dad!
yes as Badinflunce ask whats going on with your engine?
Also tell us as much as you can about your bike, engine modifications, what kind of pipes, cam, cubic inches, ect.
heres another page with tuning instructions
did you know that not having the overflow tube attached to the float bowl can cause the engine to run poorly at higher speeds? The reason I am saying this I just read this in the instructions for my S&S "E" carburetor.

cjantdad · #4 04-21-2008, 09:44 PM

Thanks guys for the response i'm sure my 1978 flh has been boored out how much i dont know it is running too rich, hard starting mostly cold but warm too. I think the carbneeds to change jets. i did points, plugs & wires i'm thinking of the coil as well. I know i have a lot to learn.

Thanks for any help Jim

Sinister · #5 04-21-2008, 10:04 PM

Great link! What jet size would you recomend starting with on an 80"?

Rodney · #6 04-21-2008, 10:14 PM

go to the chart in this link that badinflunce gave us

Sinister · #7 04-21-2008, 10:24 PM

Thanks! I was doing rear brakes and rejetting today and I thought I went to small. I droped from a 64 to a 60. I think a 62 would work much better! The 64 did not have the same pop at 1/2- 3/4 throttle that it did in the first and last 1/4 of throttle. 62 seems to be the smallest I should go.

Rodney · #8 04-21-2008, 10:33 PM

the main jet sounds to small for an 80 IMO main jet is for W.O.T.
the intermediate jet and accelerator pump is whats going to change the throttle response.
assuming the other components of the engine is tuned correctly.
keep a close eye on the spark plugs going that lean

badinfluence63 · #9 04-22-2008, 12:54 AM

cjantdad,

Okay you cursed me some how with this thread. As of this morning my '83 FL is sputtering and hard to start but runs fine once started. I feel strongly the points gap has narrowed. Will check when rested. Working 3rd shift and only seem rested when working.

Oh whom I kidding I'll rip into when I get home this morning. Hopefully minor.

72fl · #10 04-26-2008, 09:55 AM

go to S&S site that have download for setting up.