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-   -   18 Road King and the Tach Nazi (https://www.hdforums.com/forum/touring-models/1260722-18-road-king-and-the-tach-nazi.html)

billyo00769 11-12-2018 11:51 AM

18 Road King and the Tach Nazi
 
You want a handlebar tachometer on your 2017, 2018 or 2019 Road King so you don't have to take your eyes off the road or look down 250 times a day at a stupid little LCD screen???
Harley says:
NO TACH FOR YOU!

The police bikes and other touring bikes of the same year with the same engine have separate speedo/tachs. The RK has a gear/tach readout, but Harley service personnel say it "can't be done with the current BCU/ECU setup".
Really??
There is a member on this site (MaxHeadflow) who has figured it out (Can Bus). But he is basically an engineer with instructions that are too complicated for me to understand.
He also says that a coil driven tach will work connecting it to the "primary coil wire with a 1K ohm resistor in series with the tach".
Huh?
I'm just a dumb**s who wants a handlebar tachometer, I guess.
Sounds like I'm going to mess up a $30,000 Road King if I try it.

Someone please figure this out. I'm about to offer MaxHeadflow $1000 for a F***ing tachometer.
"Get this tach. Splice into this wire. Enjoy your handlebar tachometer." 1.2.3 done.

PS. Please.No old guys telling me to listen to my engine.
1 .Knowing what gear you are in and RPM is important when you are on mountain roads steep grades and cliffs on both sides.
2. Engine sounds different at the same RPM going uphill vs. downhill.
3. When you are riding 8 hours a day across the country your neck and eyes are sore from looking down and squinting at this little LCD screen taking your eyes off the road.
4.When riding hard, knowing the RPM is important.

Thousands of people on this site. Come on!


702 11-12-2018 12:01 PM


Originally Posted by billyo00769 (Post 17821604)
PS. Please.No old guys telling me to listen to my engine.

This made me giggle.

jimglassford 11-12-2018 01:02 PM

Do you have a link to the instructions you mentioned from MaxHeadflow?

I have a 2011 RKC and the Nacelle mounted tach in the billet frame was the first upgrade. Very few people wanted to pay the $500 for the parts to put this tach on their Road Kings so Harley stopped supplying them. The masses chose the goofy little tach in the speedometer instead.

6113_ 11-12-2018 01:03 PM


Originally Posted by jimglassford (Post 17821707)
Do you have a link to the instructions you mentioned from MaxHeadflow?

I have a 2011 RKC and the Nacelle mounted tach in the billet frame was the first upgrade. Very few people wanted to pay the $500 for the parts to put this tach on their Road Kings so Harley stopped supplying them. The masses chose the goofy little tach in the speedometer instead.

https://www.hdforums.com/forum/milwa...o-a-m8-rk.html

ORradtech 11-12-2018 01:20 PM


Originally Posted by billyo00769 (Post 17821604)
If you cannot follow those instructions

He also says that a coil driven tach will work connecting it to the "primary coil wire with a 1K ohm resistor in series with the tach".

Then I doubt this will help.

"Get this tach. Splice into this wire. Enjoy your handlebar tachometer." 1.2.3 done.

PS. Please.No old guys telling me to listen to my engine.

Can young guys tell you this???


1 .Knowing what gear you are in and RPM is important
4.When riding hard, knowing the RPM is important.

I, and probably a bunch of others, must be riding savants cause I spent a lot of years riding bikes that didn't even have a tach... ​​​​​​​

TheGrandPoohBah 11-12-2018 01:35 PM

Tach in my HD Speedometer Unit works fine for me.

Ex-Leftcoaster 11-12-2018 01:53 PM

If you want something less permanent, you could always use an app called RPMitUp. It's a phone app used with a WiFi ODB/OBD II scanner plugged into the bike. Use the app as a tach, tach and speedo, as well as other data like engine temp, gear indicator, etc. Just mount your phone on the bars and you're set.

billyo00769 11-12-2018 02:06 PM

Here is the link to maxheadflow's RK tach.
It is a beautiful piece of engineering. He is an amazing engineer who humbles himself by calling himself "more of a hack".


https://www.hdforums.com/forum/milwa...o-a-m8-rk.html

EdwardK 11-13-2018 03:03 AM


Originally Posted by billyo00769 (Post 17821604)

PS. Please.No old guys telling me to listen to my engine.
1 .Knowing what gear you are in and RPM is important when you are on mountain roads steep grades and cliffs on both sides.
2. Engine sounds different at the same RPM going uphill vs. downhill.
3. When you are riding 8 hours a day across the country your neck and eyes are sore from looking down and squinting at this little LCD screen taking your eyes off the road.
4.When riding hard, knowing the RPM is important.

1. If you are on a mountain road with steep grades and cliffs, the last thing you want to do is look down at a tach. Look at the road.
2. Feels different too.
3. if your riding cross country, it's called cruise control. The RPM's don't change, much.
4. When you hit the rev limiter, you have gone to far.

After 130,000 miles on my Road King, yes, there have been a few times I was curious about the RPM's but it wouldn't have changed what gear I was in knowing it. I also have over 60,000 miles on my ultras and the only time I have looked at the tach is out of boredom. If I am riding aggressively, the last thing I am going to do is take my eyes off the road.

I admire your quest to get some thing you want. FYI - You don't have an oil pressure gauge on the Road King. OMG! How do you live without that?


Vonswanko 11-13-2018 06:42 AM

I’m using a Power Vision mounted to my bars right now as the heads up tach and speedo, but I’m going to look into using either a Roadglide or Dyna Dual guage set up next.

The 2019 Road King Police edition has the speedo on the bars and a tach in the dash. I’m going to look into that set up for the wiring diagram.


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