Need advice from the wrenching gurus.. S&S 117 Build - Road Glide Forums
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post #1 of 25 (permalink) Old 12-23-2015, 11:42 AM Thread Starter
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Need advice from the wrenching gurus.. S&S 117 Build

In addition to my Road Glide I have a 1996 Fatboy. I swapped the original engine for a 2008 S&S 117 EVO. I did head work (Branch O'Keefe) and cams. My bike has difficulty starting at times and often leaves me stranded. I always give the throttle a few pumps and open my enricher before turning it over. The bike chugs before starting. It has a single fire ignition and I often get a backfire that sounds like a gunshot. I'm always able to get if going if I jump start it but that's not a solution to my problem. I'm thinking that I may need a higher torque starter. I don't want to invest in a new starter if that's not the issue. Any advise or thoughts are appreciated.

2013 CVO Road Glide 110 Anniversary Edition
1996 Fatboy

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post #2 of 25 (permalink) Old 12-23-2015, 12:04 PM
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You need to wire a double relay for the starter and compression releases assuming you have ACR's. That's what I did on the 124. Starts every time without a problem.
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post #3 of 25 (permalink) Old 12-23-2015, 06:17 PM Thread Starter
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You need to wire a double relay for the starter and compression releases assuming you have ACR's. That's what I did on the 124. Starts every time without a problem.
Thanks for the input. Yes, I have ACR's

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post #4 of 25 (permalink) Old 12-23-2015, 06:47 PM
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Plugs

It may sound like a stretch but a set of plugs might do it, or help at least.

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post #5 of 25 (permalink) Old 12-24-2015, 07:09 AM
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We've re-built many of the low-compression/emmission S&S 117"s to real fire-breathers. 130/135 are the numbers we like to see prior to calling the customer for pick-up.
Once tuned they start instantly.
Perform a compression test on both cylinders, and a leakdown test would also be benificial.
S&S carb with what jets? Bored? Thunerjetted?
What adjustable ignition was used once the engine work was established?
Happy to help.
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post #6 of 25 (permalink) Old 12-24-2015, 09:14 AM
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Needs a good tune also.


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post #7 of 25 (permalink) Old 12-24-2015, 10:43 AM
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Find someone with a dial back timing light. Most say a stock Evo should be timed at 35 deg., IIRC S&S suggests 30 deg. for the bigger motors. Check with S&S as it's been a number of years since I had a S&S crate motor. You know! CRS.
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post #8 of 25 (permalink) Old 12-24-2015, 06:20 PM Thread Starter
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Originally Posted by Hillsidecycle.com View Post
We've re-built many of the low-compression/emmission S&S 117"s to real fire-breathers. 130/135 are the numbers we like to see prior to calling the customer for pick-up.
Once tuned they start instantly.
Perform a compression test on both cylinders, and a leakdown test would also be benificial.
S&S carb with what jets? Bored? Thunerjetted?
What adjustable ignition was used once the engine work was established?
Happy to help
Scott
Super G carb but I don't remember which jets I used. I rejetted a couple of times. I'm using the Thundermax ignition. I did the work a few years ago and I don't remember all the specifics. It was a bear fitting the engine into the FB frame and we took a few short cuts to make things work out. I'm gong to have to look deeper into the specifics.


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Find someone with a dial back timing light. Most say a stock Evo should be timed at 35 deg., IIRC S&S suggests 30 deg. for the bigger motors. Check with S&S as it's been a number of years since I had a S&S crate motor. You know! CRS.
Currently timed at 35 degrees. My problem may be as simple as a timing issue. I'm a novice mechanic and most of my experience with with EFI bikes. I got some software from Thundermax but I'm not experienced enough to know how to use it; especially on a carbureted bike.

2013 CVO Road Glide 110 Anniversary Edition
1996 Fatboy
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post #9 of 25 (permalink) Old 12-28-2015, 07:06 AM
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Happy to help however we can.
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post #10 of 25 (permalink) Old 12-28-2015, 09:01 AM
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Quote:
Originally Posted by BDMastiff View Post
In addition to my Road Glide I have a 1996 Fatboy. I swapped the original engine for a 2008 S&S 117 EVO. I did head work (Branch O'Keefe) and cams. My bike has difficulty starting at times and often leaves me stranded. I always give the throttle a few pumps and open my enricher before turning it over. The bike chugs before starting. It has a single fire ignition and I often get a backfire that sounds like a gunshot. I'm always able to get if going if I jump start it but that's not a solution to my problem. I'm thinking that I may need a higher torque starter. I don't want to invest in a new starter if that's not the issue. Any advise or thoughts are appreciated.

BDMastiff- would the 117 you put into your fatboy happen to be the stock engine from your mastiff? Just curious....


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