How to make a 2017 and up tachometer functional.

Woe unto you that bought the first model year of a major remake, perhaps this section can help address any 2014 and later model Ural "imperfections". Here's a special section for folks with the latest rigs to discuss 2014 and later model-related topics such fuel injection, 3-wheel disc brakes, hydraulic steering dampers, spin-on oil filters and other anomalies that don't belong on true Russsian motorcycle ;-P We've gone from using big hammers and greasy wrenches to needing computers and Ouija boards in order to fix our rigs.
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Please keep this section specific to issues pertaining to 2014 and later models such as fuel injection, sidecar and rear disc brakes and so forth. Ask general or non-2014 and later specific questions in the main Hammerin' & Wrenchin' section.
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Re: How to make a 2017 tachometer functional.

Post by Pseudoname » Mon Jun 10, 2019 3:24 pm

Kirkus wrote:
Mon Jun 03, 2019 8:31 pm
Ok my answer works so far. Mychron rpm sensor for cart.

https://www.bmikarts.com/Mychron-RPM-Se ... p_950.html

Came with no instructions so I just clipped it on the plug wire and laid the wire along the length of the plug wire, put the other end to the grey loose wire in the headlight bucket that goes to the speedometer and so far it works fine.
Appreciate the heads up. I am trying out a new mechanic, want to see if he comes to a similar solution. Might be a week or three before I get to this, but I will report back with the fix I end up using.

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Re: How to make a 2017 tachometer functional.

Post by Kirkus » Mon Jun 10, 2019 4:25 pm

Wanderrad wrote:
Mon Jun 10, 2019 2:30 pm


Have you tried routing the spark plug wire through the loop? Asking for someone that just received one in the mail... :wink:
Good idea, may try that next
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Wanderrad
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Re: How to make a 2017 tachometer functional.

Post by Wanderrad » Fri Jun 14, 2019 5:32 pm

Kirkus wrote:
Mon Jun 10, 2019 4:25 pm
Wanderrad wrote:
Mon Jun 10, 2019 2:30 pm


Have you tried routing the spark plug wire through the loop? Asking for someone that just received one in the mail... :wink:
Good idea, may try that next
Ok, I did the install as you described except I routed the loop around the spark plug wire. Works great. My fluctuations are at the tens position even at speed. Great mod. Thanks for sharing!

Edit: I meant to say that fluctuations are at the tens position.
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Re: How to make a 2017 tachometer functional.

Post by pbrowne » Sun Jun 16, 2019 8:02 am

I took off the two bolts at the front of the fuel tank and raised the front of the tank about an inch allowing me to unbolt the coil from its bracket. I disconnected the plug with the grey wire from the coil, used a PosiTap to connect a wire that I ran to the grey wire behind the headlight.
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Re: How to make a 2017 and up tachometer functional.

Post by Kirkus » Fri Jun 21, 2019 8:41 pm

You can do that on a Gear-up, but not on a Retro.
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1968 Honda CL175 - for sale
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1992 Harley Heritage Softail - sold
2009 Triumph Bonneville T100
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Re: How to make a 2017 tachometer functional.

Post by rehab circus » Fri Jun 28, 2019 10:13 pm

Burt1713 wrote:
Sun Apr 21, 2019 5:19 pm

From what I can interpret from the schematic, if you splice the grey primary wire from either coil to the grey wire, from the speedometer, shown in the picture below your tachometer should work. You will have to adjust the settings as described in the original post so the tachometer doesn’t read half speed.



This is a proceed at your own risk modification.
On my 19 cT the coil wire was dark gray with a red stripe. I followed Burt1713's instructions and the tachometer works great. Thanks for the write up!
:cheers:
Eric
2019 OD Green cT.

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Re: How to make a 2017 and up tachometer functional.

Post by Rick405 » Fri Aug 09, 2019 7:01 pm

Hi all. I am new to the forum and new to Ural. I found the forum while looking for information on putting a tach on my Ural. What a great source of information this forum is.

I wanted to share what I learned while getting my tach to work. I have a 2019 Gear Up. The coils are mounted vertically under the gas tank. I was able to do this without removing or tilting the tank. I found the top coil (left side spark plug) was easier to get to. From between the bike and side car I was able to remove the connector and gain access to the wires. The wires are a blue/red (ground) and a blue/tan (from the ECU).

There isn't enough access to the wires to cut and solder a lead for the tach so I used a Posi Tap. I wanted to make it as waterproof as I could so I attached the accessory wire (that's what Posi Tap calls it) to the Posi Tap and put silicone around the opening where the wire enters and around the joint where the cap attaches to the Posi Tap and let it dry. I think the tap part of the Posi Tap maybe some what waterproof because the wire seems to fill the space between the U shaped cap when you tighten it down. I put a little dab of silicon in the cap before I put the wire in the U hoping it might help. I plugged the accessory wire into the grey wire on the speedometer and it works perfectly.

I'm so glad I found this post. Sure made adding a tach easy. Thanks to all for a great forum

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Re: How to make a 2017 and up tachometer functional.

Post by RC20 » Sat Aug 10, 2019 12:20 am

I am going to launch into it myself. My same take, make sure its sealed, corrosion in wires is nothing to mess with. Once it gets going it will get back into it an amazing distance.
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1 x CB700 SC (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
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RC20
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Re: How to make a 2017 and up tachometer functional.

Post by RC20 » Sat Aug 10, 2019 1:28 am

I am going to get the wiring diagram blown up and start labeling wires on it with the colors. I hate using a magnify glass to look at one of these, I have bi-focal and that should be good enough (far better than nothing and blow up printers are lovely devices) - good to have the diagram in the book.
Formerly Owned: ( various rides on others)
Honda 90
2 x CB750K (one a true Japan Model flown to Hawaii by a P3 Orion Sub Patrol Aircraft!)
1 x CB700 SC (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
1 x CB450K
1 x 2019 cT Terracotta

Mechanic/Technician/Engineer: Electro Mechanical Systems

RC20
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Re: How to make a 2017 and up tachometer functional.

Post by RC20 » Tue Aug 20, 2019 9:52 pm

Ok, I got it done on the 2019 cT I own (18 inch tire and 4.62 FD)

I went with the Posi connector and it worked nicely. Only issue was the extension wire and the room to work with and a tad shorter than it needed but it looked plenty long to start with. hmmm.

The wire colors seem to change (the tap off the Speedo head is the Grey as listed). My coil had a Blue with Red Strip and a Blue with Orange stripe.

Frankly as its a voltage pulse to the coil I am not sure it makes any difference which one you use. I went with Blue and Orange as they looked to be the input not the ground.

I used Dialectic grease for the added sealing on both ends of the Posi Tap.

Speed chart I ran when done is in the Virtual Watering hole.

There is not a lot of room to work in there and I took the horn off to get threaded back and onto the coil plug.
Formerly Owned: ( various rides on others)
Honda 90
2 x CB750K (one a true Japan Model flown to Hawaii by a P3 Orion Sub Patrol Aircraft!)
1 x CB700 SC (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
1 x CB450K
1 x 2019 cT Terracotta

Mechanic/Technician/Engineer: Electro Mechanical Systems

RC20
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Re: How to make a 2017 and up tachometer functional.

Post by RC20 » Wed Aug 21, 2019 3:43 pm

This chart is very close to what data I took (keeping in mind watching the road, getting an RPM at a set speed and then stopping to write it down was not easy!)
2011 Ural GU Speed RPM.JPG
People have misinterpreted (my opinion) the top RPM for the newer Urals. While it lists 41 hp at 5500, that is not the red line.

Red line is on the data tag on the left front frame rail and that is 6200.
Power Curve 2015.jpg
While HP is falling off after 5500 and toque has been going down after 4300, there is still hp and toque there.

You then get into a hp/torque to speed and the resistance of all the forces as to when that cancels out. Haidel had a Ural up to 83 and that is just below ( by calculation ) of the max RPM of 6200. Its close to if not self limited in 4th.

Where it really plays in and need to know is the lower gears. 30--35 would be max in first, 45-50 max in 2nd and 65 looks to be the max in third.
Ural Data Tag.jpg
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Last edited by RC20 on Wed Aug 21, 2019 9:41 pm, edited 1 time in total.
Formerly Owned: ( various rides on others)
Honda 90
2 x CB750K (one a true Japan Model flown to Hawaii by a P3 Orion Sub Patrol Aircraft!)
1 x CB700 SC (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
1 x CB450K
1 x 2019 cT Terracotta

Mechanic/Technician/Engineer: Electro Mechanical Systems

Rick405
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Re: How to make a 2017 and up tachometer functional.

Post by Rick405 » Wed Aug 21, 2019 7:29 pm

RC20. The blue/red was obvious. The other one looked tan but it could actually be orange . Glad it worked for you.

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Re: How to make a 2017 and up tachometer functional.

Post by RC20 » Wed Aug 21, 2019 9:39 pm

Happy clam. I see Blue/Red on other items (TB) so am inclined to ground but normally that would be green/light green.

To confuse things with the change in FI for 2019 the wiring colors have changed as well.

From my wiring diagram it looks like the Blue/Red (comes off a 15a fuse) is a hot and the ECU grounds the circuit via the Blue/Orange.

Other than ???? I don't think it matters as the circuit stays quiet until the ECU triggers it and its a pulse the tach sensing line picks up.

Electrically it all works so what the heck.
Formerly Owned: ( various rides on others)
Honda 90
2 x CB750K (one a true Japan Model flown to Hawaii by a P3 Orion Sub Patrol Aircraft!)
1 x CB700 SC (RC20 is the actual in house production Model)
1 x R80GS (ok to start with, learned to love it for what it was)
1 x CB450K
1 x 2019 cT Terracotta

Mechanic/Technician/Engineer: Electro Mechanical Systems

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