I was told that my Electra-Glide Ultra Classic 1340 had the Screamin' Eagle upgrade whenever I purchased it in 2020. This meant nothing to me because I knew absolutely nothing about the upgrade at the time. Gradually, I have become curious about the SE upgrade due to reading on these forums.
A little bit of information here, and a little bit of information there.

So, I have attempted to understand exactly what Screamin' Eagle might be in 1998. I have found that there is no concise, written history of SE on the internet (this is my assumption). By research, I now have a vague understanding of what upgrade my bike might have.

Please do offer corrections if you see that I am incorrect.

Here is a link to the instruction sheet for Screamin' Eagle Electronic Fuel Injection (EFI) Stage 2 Kit. This document has a revision date of 12-21-98. And the kit number would be Kit 29934-97A. I do not know that there was a Stage III at the time.??

From reading on these forums, I understand that the stage II fuel injectors (PN 27135-97) were red in color as opposed to the stock fuel injectors which were black. My bike has the red injectors.
I have come to the assumption that this would mean that my bike also has the cam (PN 255366-97), air breather, filter (PN 289055-89) installed, and recalibration of the Electronic Control Module (ECM).

I have not been able to find any other modifications associated with the stage II upgrade and I have not been able to find any reference to a stage III for 1998 or earlier. I know that in later years there were many modifications associated with stage II and the introduction of state III and IV.

Do you fellows know of additional modifications associated with the Screamin' Eagle Stage II that I have been overlooking? Were there SE head modifications back in the late 90s?

If my assumption that there were only stages I and II back in 1998, please let me know and don't be polite.

 

OK, first up, I have proven myself to be ignorant. Within the document to which I posted a link, there is mention of a stage III within the document. But, for the life of me, I cannot find any document for this stage III which would relate to 1998 EVO engine.

 

You have an official Stage 2 for sure, but I cannot find that cam part number anywhere (and I got lots of books).

The Stage 3 was never an official HD "thing" for EVO but could have been considered SE heads or a lot of machine work on your stock ones plus Stage 2

There were 2 versions of the SE heads. One was designed for stock pistons but had all the good stuff for springs, lift clearance, etc. The other style were the same except designed for the special SE 10.5-1 pistons. So the Heads + stage 2 could be considered Stage 3 and heads plus pistons could be Stage 4 and any other trick you could throw money at in search of big HP.

I never did any head work other than stock, but I've heard for years the high end porting guys preferred re-working stock heads over SE. But that was if you were trying to reach the pinnacle of HP.

That's all I know but if I'm mistaken of left something out maybe some of the others will be along with more or better info.

 

My 98 RKC had a stage I kit in it when I got it. All that consists of are free flowing pipes and breather. I didn't see a set of pipes in your Stage II kit. Take a look at the pipes on your bike. There should be a p/n and some writing stamped on them somewhere (mine have that). That may be another clue.

carl

 

I had a typo on the cam number which should be PN 25536-97 instead of PN 255366-97.
Thanks for the information above. I really had quite a time searching the internet for just the little information that I now have. I have not been able to fine the original instruction prior to the 12-21-98 revision. Your post has educated me quite a bit.

Ya know, someone should really write a book on the Screamin' Eagle line of upgrades to chronicle its beginnings and changes over the years. It is currently very confusing and has changed so much over the years that it will cause those restoring old motorcycles quite a lot of confusion in the decades to come. I suspect that SE is different for each model, engine, and flavor of bike.

If someone knowledgeable does not write a book soon the knowledge and facts will be lost forever, and restorations will become impossible.

I have very many books on the Evo motorcycle, but I did not buy Donny Petersen's Volume IV: Performancing the Evolution because I did not desire to hot rod my engine, but if it's already souped-up then his book may give me an insight on what I have. So, I will order it.

 

In the late 90's.
I remember that a stage 1 was air cleaner and pipes. This was kinda/sorta a basic set-up.
The folks with a carb sometimes got a little work on carb the EFI got nothing else.
Then for stage 2 it was basically stage 1 plus the catalog had a cam, injectors and a module (download).

 

Maybe, since the red injector flow more than the black injectors, and and depending on cam in play with the K&N more flowing filter, the red injectors alone flowing more, may not require that the ecm to be re-flashed itself.
But since you may have the ev3 can, then reflash in order.
EV3 cam (hd 25536-97), if you want to compare it to the either the EV13 or EV27 cams.

Hence stock cam, to ev13 cam, all you need to do is swap the injectors from black to red, and will have the needed fuel increase that the cam is requiring (if you want to stay with the HD oem leaner tune).
Myself, prefer to tune with Black injectors for the ev13 cams, since more than just addded cam fuel requirements, but fuel is cooling, so like to run the motor of the richer side isntead..

To add, if your K&N filter is ragged, can go with the direct K&N filter or the blew, that is $50 cheaper than the one that is branded as HD.
https://deadbeatcustoms.com/drag-spe...-oem-29055-89/

Also to note, the EV 3 cam was to give the motor a little more mid/ top end rpm, and on heaver touring bike, EV13 cam gives more power lower and mid range, where your going to use it instead.
Hence HD picked the ev3 cam for stage 2, since could be used on the lighter bikes, and the heaver bikes as a single kit for both, instead of heaver bikes getting the ev13 cam and the lighter bikes getting the EV27 cam that works better, but may have had problems for EPA emission limits instead.

So back to your question, stage 2 was red injectors, K&N filter, ev3 cam, and ecm re-flash to get the bike needed extra fuel, but to stay leaner running for epa limit as the time for HD to keep them happy.
Note, every HD tune you get, will still have the bike running lean, to keep EPA happy.
How lean, in some of the HD tunes, where talking 18AFR at times, where the max you want is 14.7AFR at any time instead.

Since touring bike, when it comes time to change lifters, now if A lifters and motor has more than 20K mile, and every 35K if B or Johnson 2303 lifters, if Ev3 cam has any of it case harden worn off the lobs, then change out out to EV13 cam ,new cam B138 needle bearing, and get bike tuned, and again on the richer side, since fuel is cooling.

 

Stage I for EFI was air cleaner and breather kit. Stage II Was what's on the sheet Wes posted.

That weird cam number is on the install sheet as 25536-96 but I've found it (not that number) in 2 other places associated with kit as an SE-3 which is basically an Andrews EV-27 and as the only cam you can run with the stage II kit. Also stock mufflers were acceptable They also show SE heads that could be used with Stage II and required an included calibration cartridge.

I found in one of my books all the Stages I thru IV with listed parts and numbers plus dyno sheets to match, factory claims. They only apply to carburetor models.

Wes, if you or any of the other guys want, I can take photos of it all and post. Let me know. It'll be tomorrow before I could start.

 

Yes, please. I would like very much to see the pictures of the information.

Dano523, you caused my head to explode with the information. I have read and re-read your post and it will take some time for me to absorb everything that you have said.

P.S.: The reason that I started this thread was because my tech installed an OEM air filter and my idle rpm dropped. I have now ordered the K&N 8" Screamin' Eagle filter.

 

Just for the sake of completeness here is a link to the stage I instruction sheet:
SCREAMIN' EAGLE ELECTRONIC FUEL INJECTION (EFI) STAGE 1 KIT Rev 12-21-98
And the kit number would be Kit 29387-97A for 1997 and 1998.
The kit number would be Kit 29386-95 for 1996 and earlier.