Cruise Control doesn't work in 3 wheel mode.

[HDUSA1]

Trust me, you guys are way smarter than me.

Still make me wonder - why does PFWiz's bike work. He has cruise when he turns on three wheels. He does not have the RDRS system.

PFWiz’s bike works because he doesn’t have the RDRS system that’s looking for wheel speed sensors on 3 wheels.

 

[HDUSA1]

I found a couple of others posting on the Sidecar forums dealing with the RDRS issue also. I found this to be interesting:

“2020 RDRS. Dealers made it clear it could not be done. When we mounted a Hannigan twin on one we prepared for the worst. Had already gone into BCM and shut down the BAS. And turned it back on. In the end the IMU used with RDRS is pretty smart. No changes were needed.
For the record I have tested it to the limits and have not forced a shut down. Braking system works as it should. traction control and VHC work.”

After I had installed my Roadsmith conversion, I had ridden it for a few hundred miles before having the dealer enable the new BAS switching it to Sidecar mode. It never shut down on me cornering and as the poster I quoted above stated, the IMU (inertial management unit) in the RDRS must be pretty smart to work with the factory BAS.

With that said, I’m going to switch my bike back to 2 wheel mode. I put TPMS sensors in both rear wheels, I’ll have them program the right rear one as I mount the bike on the left and pay more attention to that side. My cruise will then work as it did before as well as the VHC (vehicle hold control).

To conclude and just my opinion, if you don’t have RDRS, use the new BAS and put the bike in 3 wheel mode. If you have RDRS, leave it in 2 wheel mode without the new BAS and put a TPMS sensor in whichever rear tire you want to monitor.

 

[cycle7447]

I found a couple of others posting on the Sidecar forums dealing with the RDRS issue also. I found this to be interesting:

“2020 RDRS. Dealers made it clear it could not be done. When we mounted a Hannigan twin on one we prepared for the worst. Had already gone into BCM and shut down the BAS. And turned it back on. In the end the IMU used with RDRS is pretty smart. No changes were needed.
For the record I have tested it to the limits and have not forced a shut down. Braking system works as it should. traction control and VHC work.”

After I had installed my Roadsmith conversion, I had ridden it for a few hundred miles before having the dealer enable the new BAS switching it to Sidecar mode. It never shut down on me cornering and as the poster I quoted above stated, the IMU (inertial management unit) in the RDRS must be pretty smart to work with the factory BAS.

With that said, I’m going to switch my bike back to 2 wheel mode. I put TPMS sensors in both rear wheels, I’ll have them program the right rear one as I mount the bike on the left and pay more attention to that side. My cruise will then work as it did before as well as the VHC (vehicle hold control).

To conclude and just my opinion, if you don’t have RDRS, use the new BAS and put the bike in 3 wheel mode. If you have RDRS, leave it in 2 wheel mode without the new BAS and put a TPMS sensor in whichever rear tire you want to monitor.

Thanks - essentially, this is what my dealer did. In 3-wheel mode, the bike was looking for a third sensor to make the cruise work.

Going back to 2-wheel mode, cruise worked perfectly. I was just happy to get the low tire light to go away.

 

[Smitty901]

Toss the HD TPMS disable it . Go with FOBO 2 for Trike and forget the HD stuff.

 

[HDUSA1]

To follow up on my bike.

I ordered a Technoresearch VCM-TR4B Centurian Super Pro with a single use license rather than paying the dealer multiple times to experiment with the settings.

I’ve since spoken to Jim at Roadsmith to pick his brain and finally got the answer I was looking for.

Seems there are some 2020 Ultras with RDRS that the cruise control just will not work in 3 wheel mode. I tried every combination in the Technoresearch settings to reactivate the cruise control and no luck. Jim confirmed they had the same issue in the 2020’s and they cannot figure it out why some work and some don’t.

So I put mine back in 2 wheel mode which disables the external BAS. I purposely took some curves and intersection corners much harder than I normally would and could not get the internal BAS to go off. The cruise control and everything else works fine.

I then turned my attention to the TPMS sensors. I activated all 3 of them in 3 wheel mode and they worked fine. The problem is, I could not change the rear sensors to a lower psi when they activate. I’m running 22-24 psi in the rears so the low pressure light is always on and it flashes on the instrument panel every time I start the bike. Same in 2 wheel mode so after a couple rides, I got tired of seeing it and turned the TPMS off.

Another interesting thing I found in the Technoresearch settings. After I changed my cam, exhaust, intake, and other goodies, I loaded Fuelmotos map in the PV tuner. I had a great lopey idle and the bike ran fantastic, but the fuel mileage sucked at 30 mpg. Walking behind the bike at idle, it smelled rich. Playing around with the Technoresearch, there is a selection to reset the AFV (air fuel value) tables. The bike still runs great, but I don’t have nearly the lopey idle now, it doesn’t smell rich, and I’m getting 32-34 mpg now.

And lastly, the Technoresearch does the ABS bleeding procedure. After I installed the Roadsmith kit and manually bled the rear brakes, I never felt very confident in their stopping power with hard stops and it seemed like there was a lot of pedal travel. I manually bled the brakes a couple times after and no change. After I ran the ABS bleeding procedure, now I have a hard pedal and the rear brakes are much better now.

 

[Smitty901]

To follow up on my bike.

I ordered a Technoresearch VCM-TR4B Centurian Super Pro with a single use license rather than paying the dealer multiple times to experiment with the settings.

I’ve since spoken to Jim at Roadsmith to pick his brain and finally got the answer I was looking for.

Seems there are some 2020 Ultras with RDRS that the cruise control just will not work in 3 wheel mode. I tried every combination in the Technoresearch settings to reactivate the cruise control and no luck. Jim confirmed they had the same issue in the 2020’s and they cannot figure it out why some work and some don’t.

So I put mine back in 2 wheel mode which disables the external BAS. I purposely took some curves and intersection corners much harder than I normally would and could not get the internal BAS to go off. The cruise control and everything else works fine.

I then turned my attention to the TPMS sensors. I activated all 3 of them in 3 wheel mode and they worked fine. The problem is, I could not change the rear sensors to a lower psi when they activate. I’m running 22-24 psi in the rears so the low pressure light is always on and it flashes on the instrument panel every time I start the bike. Same in 2 wheel mode so after a couple rides, I got tired of seeing it and turned the TPMS off.

Another interesting thing I found in the Technoresearch settings. After I changed my cam, exhaust, intake, and other goodies, I loaded Fuelmotos map in the PV tuner. I had a great lopey idle and the bike ran fantastic, but the fuel mileage sucked at 30 mpg. Walking behind the bike at idle, it smelled rich. Playing around with the Technoresearch, there is a selection to reset the AFV (air fuel value) tables. The bike still runs great, but I don’t have nearly the lopey idle now, it doesn’t smell rich, and I’m getting 32-34 mpg now.

And lastly, the Technoresearch does the ABS bleeding procedure. After I installed the Roadsmith kit and manually bled the rear brakes, I never felt very confident in their stopping power with hard stops and it seemed like there was a lot of pedal travel. I manually bled the brakes a couple times after and no change. After I ran the ABS bleeding procedure, now I have a hard pedal and the rear brakes are much better now.

I have two 2020 RGL with RDRS and Cruise works as it should. 2 or 3 wheel mode.
My 2024 RGL that is triked has issues in 5 and six gear. In 5th I have to engage it at 55mph and it works fine up and down after that. Six gear I have to engage it at 62 mph and it works up or down after.
The issue is HD. I need time to get in and do some digging . It is related to a gear ratio issue due to sensor. Some have been correcting it using a TTS tuner.
I am sure when I adjust the ratio it will straighten out.

I use a Technoresearch and a Power vision.

Stock 2 wheel tire size is 180/55 18.

If you are running a 205/55 r16 car tire on your trike the difference will be.
-3.6 % Diameter or a +29 rev per mile.
Not a big deal except the front is still factory size and when it compares front and rear VSS it does not like what it sees. If speedo displays 60 mph you are doing 57.9.
VSS sees that 2.1 difference as a problem. Shutting off traction control does not complete shut down RDRS.

Also on the Trike we run lower tire pressure on the rear . That would make the difference even larger.