SE Stage IV 131 kit engine & dyno testing 2020 FLTRXS
Tourer
Joined: Dec 2006
Posts: 467
Likes: 203
I'll be interested in hearing how round the cylinders are and how well the pistons fit -- seemed to be an issue in the past with moco kits.
Also would be nice to hear what's different with the new heads and how the compare with your own type A and B.
Also would be nice to hear what's different with the new heads and how the compare with your own type A and B.
Jamie, will you use the head pipe that came with the kit or something different? I assume the head pipe has a high flow cat and a larger collector than the normal head pipe but still uses the stock heat shields. My local dealer has not been able to find out if an aftermarket head pipe will fit or not. In the HD listing it states you can not use the SE high flow exhaust system.
Looking forward to more information and results.
Looking forward to more information and results.
Top> SE pipe supplied with 131 kit
Bottom> OEM head pipe
__________________
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Jamie Long / Fuel Moto USA
The USA's Leader V-Twin EFI & Performance www.fuelmotousa.com
Contact 920-423-3309
Email jamie@fuelmotousa.com
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,623
Likes: 11,356
From: State of Confusion
hope you're using the SEPST as a baseline for folks, first do the ecm calibration, then dyno tune that with SEPST..then you can work your magic in stages so folks have a good understanding of how much you will improve upon it with upgraded components and tuning, etc
To answer some of the requests and questions we are getting on the 2020 FLTRXS Screamin Eagle 131" build we are doing we put together the following info.
1) we will be initially assembling the Stage IV 131 kit as delivered from H-D including the catalyst exhaust. We are also using SE air cleaner and SE Pro Street Tuner.
2) any variance or substitutions from the H-D spec'd components will void the vehicle powertrain warranty as well street legal status. (example: you cannot use a different exhaust, air cleaner, or tuning device and retain warranty)
3) after our initial evaluation is done we may test some aftermarket components with the kit. We however want it to be very clear this will affect the warranty & emissions compliance on these engines & kits, any modifications we perform with this kit will be for test purposes only.
1) we will be initially assembling the Stage IV 131 kit as delivered from H-D including the catalyst exhaust. We are also using SE air cleaner and SE Pro Street Tuner.
2) any variance or substitutions from the H-D spec'd components will void the vehicle powertrain warranty as well street legal status. (example: you cannot use a different exhaust, air cleaner, or tuning device and retain warranty)
3) after our initial evaluation is done we may test some aftermarket components with the kit. We however want it to be very clear this will affect the warranty & emissions compliance on these engines & kits, any modifications we perform with this kit will be for test purposes only.
HD EFI Guru
Joined: Jan 2008
Posts: 4,462
Likes: 4,718
To answer some of the requests and questions we are getting on the 2020 FLTRXS Screamin Eagle 131" build we are doing we put together the following info.
1) we will be initially assembling the Stage IV 131 kit as delivered from H-D including the catalyst exhaust. We are also using SE air cleaner and SE Pro Street Tuner.
2) any variance or substitutions from the H-D spec'd components will void the vehicle powertrain warranty as well street legal status. (example: you cannot use a different exhaust, air cleaner, or tuning device and retain warranty)
3) after our initial evaluation is done we may test some aftermarket components with the kit. We however want it to be very clear this will affect the warranty & emissions compliance on these engines & kits, any modifications we perform with this kit will be for test purposes only.
1) we will be initially assembling the Stage IV 131 kit as delivered from H-D including the catalyst exhaust. We are also using SE air cleaner and SE Pro Street Tuner.
2) any variance or substitutions from the H-D spec'd components will void the vehicle powertrain warranty as well street legal status. (example: you cannot use a different exhaust, air cleaner, or tuning device and retain warranty)
3) after our initial evaluation is done we may test some aftermarket components with the kit. We however want it to be very clear this will affect the warranty & emissions compliance on these engines & kits, any modifications we perform with this kit will be for test purposes only.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
The way I was told on the 131 kit or engine it MUST be installed at an HD authorized dealership to retain the warranty, so you may want to be very careful on it if your looking to maintain the warranty. Otherwise, it only comes with a parts warranty which I believe is 6 months on the kits and 1 year on the engine package if you buy that. The rest of your two year factory warranty will be out the window for the Powertrain.
