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+--- Thread: Rev Limit at 5,500 RPM (/showthread.php?tid=4316)
Rev Limit at 5,500 RPM - mvk24_imp - 04-30-2022
I know guys just won't run gauges at all on custom / Cafe builds. Or just a small tachometer so that the front is very low profile.
That would be another option
2014 CB1100, 1981 KZ440 LTD, 1993 Yamaha XJ600 Seca, 1994 Yamaha XJ600 Seca
(04-30-2022, 11:03 AM)wanobiben_imp Wrote:(04-30-2022, 10:53 AM)Cormanus_imp Wrote: wanobiben, three things.
First, I’m not sure there is any problem with the bike exceeding 112 mph (180 kph). My understanding is that the speed limiter is a requirement of Japanese law and for some reason Honda have left it in place on exported bikes.
Second, on the basis of the information on this forum, the only place (maybe in the world) that’s ever reflashed the CB1100’s ECU is Don Guhl motors and he will no longer do it for legal reasons. Search the forum if you’re interested; there’s discussion about it somewhere.
Third, is there someway to fudge it and fool the ECU into believing the original speedo is still attached? Or even reconnect it and hide it under the seat somewhere?
Today I’ve actually been thinking about buying a used stock speedo and taking it apart to fit under the seat. It may end up being the easiest solution without just reinstalling the original speedo.
Today I’ve actually been thinking about buying a used stock speedo and taking it apart to fit under the seat. It may end up being the easiest solution without just reinstalling the original speedo. Hey bro, I assure you the bike handles great around 130mph.. a friend told me.
My ECU was flashed and speed limiter removed. No issues at track speeds at all
2014 CB1100, 1981 KZ440 LTD, 1993 Yamaha XJ600 Seca, 1994 Yamaha XJ600 Seca
RE: Rev Limit at 5,500 RPM - peterbaron - 04-30-2022
My CBs don't have this problem...
Rev Limit at 5,500 RPM - wanobiben_imp - 04-30-2022
(04-30-2022, 11:36 PM)m in sc_imp Wrote: ive wondered about blanking off some of the holes int he speed sensor trigger wheel, then using a speedo healer to make up for the inaccurate reading you would get fromt he speedometer. however, this seems to indicate it goes from the sensor tot he speedo then the ecm. maybe. honda and their weird ass ecms. I wonder if a standalone might be the best way to go at this point? has anybody tried running the bike with the gauges just removed or unplugged and run a gps speedometer to see what it does?
It’s because my original speedometer is not hooked up as to why the ECU is limiting my redline to 5,000rpm.
Rev Limit at 5,500 RPM - wanobiben_imp - 05-01-2022
(05-01-2022, 04:02 AM)m in sc_imp Wrote: but did you tie into the stock speed sensor wire or using the one that came with the gauge? that was the root of my question. if its NOT hooked up to the stock sensor wire then you answered it.
It’s not hooked up to the stock speed sensor. The stock speed sensor is unhooked right now. I installed a separate speed sensor on the front wheel for this new meter.
RE: Rev Limit at 5,500 RPM - wanobiben_imp - 05-02-2022
(04-27-2022, 08:54 AM)Lord Popgun_imp Wrote: Just so you know, the bike has a bidirectional serial data line between the ECU and the Combination Meter. (2010-13 bikes do not have this)
The meter sends to the ECU: Rear wheel speed sensor signal
The ECU sends to the meter: High oil temperature indicator signal, Engine speed signal, MIL signal, Fuel pulse signal.
What I don't understand is that if the rev limit is based on speed, how did the bike rev above 5,000 rpm with the stock meter on when it's sitting still or in Neutral?
Because of that, I've been wondering if there is some way to maybe trick my bike's ECU to make it think the original meter is hooked up. I've thought about getting into an Adurino device just to have it hooked up to the original speed sensor and send a signal back to the ECU, but I am not a programmer so that's not likely an option unless I find someone else who is.
RE: Rev Limit at 5,500 RPM - Lord Popgun - 05-02-2022
The rev limit is based on rpm and is ~8500rpm.
Speed limiter is based on speed. And that's about the extent of my knowledge on that.
RE: Rev Limit at 5,500 RPM - wanobiben_imp - 05-02-2022
(05-02-2022, 01:46 AM)Lord Popgun_imp Wrote: The rev limit is based on rpm and is ~8500rpm.
Speed limiter is based on speed. And that's about the extent of my knowledge on that.
Do you know which wire this is on the wiring diagram? For the 2014 model would this be the white wire labeled M-TXD/RXD? It appears to be one of the only wires that connects from the meter to the ECM.
RE: Rev Limit at 5,500 RPM - wanobiben_imp - 05-02-2022
[/quote] thats my point. it may just be looking for the sensor to be there to allow it to rev.
[/quote]
Now I'm tracking with you.
RE: Rev Limit at 5,500 RPM - Lord Popgun - 05-02-2022
The TXD/RXD line is the serial data line.
Rev Limit at 5,500 RPM - wanobiben_imp - 05-03-2022
So I connected the 5V wire to the M-TXD/RXD wire and there were no changes. I can’t imagine what else the 5V out would be used for.
![[Image: 21be0fb0687cfea58219d4bab6eaab23.jpg]](https://cb1100forum.net/forum/uploads/imp/202205/21be0fb0687cfea58219d4bab6eaab23.jpg)
The spreadsheet below is how I had it wired before I swapped the 5V wire.
![[Image: 02d492a0221d183c0326f4cda3a83f76.jpg]](https://cb1100forum.net/forum/uploads/imp/202205/02d492a0221d183c0326f4cda3a83f76.jpg)