On way to Sturgis my volt regulator died. The nearest dealership told me my stator then over charged my electric system, killing the battery and my screaming eagle ignition module. Also burned out headlamp and turn signals. They found a voltage regulator at another dealer, but had problems finding a ignition module. I was told that Screaming Eagle hi-rev ignition modules are no longer available. Additionally, HD stock ignition modules are no longer available for 1990 FXRS'.

Luckily, the dealer had a test ignition module (stock) that they were willing to give me, to get me back on the road. A few hours later, I was on the road. I left a little too quick, as an hour down my tachometer was not acting normally.

While I understand that this stock ignition module would not perform like my hi-rev screaming eagle module, my tachometer was not displaying the correct RPMs. At 75 MPH, my tachometer would previously display around 3200 RPMs. Using the stock ignition module, my tachometer now displays roughly 1600 RPMs. It appears that my tachometer is displaying roughly half of what my actual RPMs are. Another result (coincidence?) is my engine also appears to run much hotter than before. This could just be due to the higher outside temps in UT and WY.

I struggle with fully understanding the ignition/timing stuff on my Harley. When installing the ignition sensor during my rebuild, I recall it looking like a stock unit (as opposed to the Revtec sensor in my other bike). I believe my coil is also a Screaming Eagle unit. ( I base this statement on it's orange color)

My questions are:
1) What is causing my tachometer to not display for correct RPMs? I assume it's due to the stock ignition module, but can this be corrected?
2) I want my hi-rev ignition module back! The guy at JP Cycles in Sturgis, said to buy a new ignition sensor that does away with the ignition module (black box in side cover). I would have bought what he suggested, but he did not sound very knowledgeable or convincing. What do you guys recommend? Engine is 40 thousands over, 10:1 pistons, S&S 520 cam, HSR42 Mukuni, polished/ported heads.

Sorry for being long winded, but look forward to your help.

 

I've used the Ultima ignition pkg. which I happen to like alot as do others here.It's programmable and very easy to set up.At $ 160 from amazon makes it a no brainer.It's worked for me

 

I have that high RPM SE module on my bike. No rev limiter at all. BTDT on the regulator blowing out stuff. Happened to me about a decade ago in St. Joe on the way back from Sturgis.

A lot of guys go with the Ultima ignition. I think that if I needed one, that's what I would go with. I think that's what he was suggesting.

 

Thanks Dr. Hess. I was lucky battery did not melt. I burned myself trying to remove battery. Is there a specific Ultima ignition module you recommend, or will there be only one for my year/model?

 

Thanks 86glider - do you recommend part #53-625: http://www.ultimaproducts.com/extern...tion_kits.html

 

Yeah, my battery was toast when it happened to me. I had managed to make it the last 30-ish miles to St. Joe with it like that. And, this year, on the east side of Mitchell gasing up, I diagnosed a twinkie softtail with the same problem. His battery burst.

I'm not sure on the part number. Whatever Ultima says is for your bike.

 

IF you are riding an antique like we all are -
I suggest you become your own expert.
In a hurry !
Dont go to a dealer as they can't fix any better then you can right?

Going to a dealer for the new stuff is bad enough with the new crap.
Dont go there with your old EVO

#1-HUGE MISTAKE TO TRUST AN OLD IGNITION SYSTEM- !
Anytime you look n here someone is trying to make the old POS modules work.

Get a Daytona TT and be done..if you are a worry wort like I am, - I carry an extra and a complete breaker plate assembly in case of an "EMB."
30 lbs of tools, a siphon hose, gallon of gas in the saddle bag
I have enough stuff to bust it dwn to the point of spitting the case.
Pice of mind.

 

You can make just about any ignition system work. Personally I would go with a all in one ignition module that fits in the Nose cone of the cam chest...
https://www.ebay.com/p/Ultima-Single...8803119&chn=ps
Will easily install and by following the directions properly your Tach should function normally again.
It almost sounds as if they switched your tach signal or possibly changed from a dual fire to single fire ignition.. The link you posted is for 96 up with Duetch connectors that you don't have...

 

You just described Daytona TT
It brings lots of options and EZ to operate

 

That Ultima ignition is the bees knees! I put it in my 98 Ultra during an efi to carb swap. just make sure you read the directions and set the switches correctly. could not have been simpler.