Midrange flatspot

Mark Hooton

Cymarcbikeparts
Joined
Oct 29, 2009
Messages
3,993
Reaction score
121
Location
Scunthorpe England
Guys/Gals, as I love with my 2014 GSA as I am it (did) suffer from the midrange flatspot - I’m sure most of us either don’t notice/ignore it/or already done something about it but if anyone is interested I’ve done a five minute video on what I think is a economical option.

Stressing I’m not a film star and I’m renowned for my love of red wine and nonsensical rambling

But if it offers a solution for somebody then my job today is done

Ride safe guys/gals

https://youtu.be/uJ48rQWutb4


Sent from my iPhone using Tapatalk
 
Guys/Gals, as I love with my 2014 GSA as I am it (did) suffer from the midrange flatspot - I’m sure most of us either don’t notice/ignore it/or already done something about it but if anyone is interested I’ve done a five minute video on what I think is a economical option.

Stressing I’m not a film star and I’m renowned for my love of red wine and nonsensical rambling

But if it offers a solution for somebody then my job today is done

Ride safe guys/gals

https://youtu.be/uJ48rQWutb4


Sent from my iPhone using Tapatalk

Just to let you know this is the hexhead section not the LC section.
 
Good spot that its in the wrong forum :) Has anyone tried one of these on a Hexhead?
 
Look like lambda sensor signal manipulators similar to the AF-XIEd`s.
This is the best way to go with modern bikes although I am surprised that they claim a change of exhaust will not be adapted to by the stock system, my data shows otherwise.
I could not see a price on their website, how do they compare on price.
would be nice to see the real time AFR data on a road ride.
 
Look like lambda sensor signal manipulators similar to the AF-XIEd`s.
This is the best way to go with modern bikes although I am surprised that they claim a change of exhaust will not be adapted to by the stock system, my data shows otherwise.
I could not see a price on their website, how do they compare on price.
would be nice to see the real time AFR data on a road ride.

Sorry for the wrong section - the kits are around £150 I think (got mine trade) and yes AFR would be interesting. I`ve the 911 pro but it won`t show AFR once I`ve broken the OEM system with the easy kit
 
Yup wrong section (sorry) and no I don`t know if anyone has.

You can move the post/thread… top of the thread, administrative . Click on it and a drop down box gives you options, one of them is ‘move thread’.
 
on the AF-XiEDs the old GS air cooled ones used to work - BW spotted the fun and did an ECU update that throws its teddies and the EML - nightrider then did some delay gadgets pretending they are off until BMWs hack gets over itself - then they switch on - nightrider then later re did the units with it built in - they never confirmed if the LC ones will work on the earlier air cooled bike ( if u plan of upgrading one day)

gist is - are these after-market one clever enough to get round a possible out of date ECU map or will these then play up if the bike electronics are updates (i think past 2016) ?

plus no one mentioned the 1250 yet ? nor when are we getting the R1300 and then proper cruise control... 2 years after the RT ?
 
on the AF-XiEDs the old GS air cooled ones used to work - BW spotted the fun and did an ECU update that throws its teddies and the EML - nightrider then did some delay gadgets pretending they are off until BMWs hack gets over itself - then they switch on - nightrider then later re did the units with it built in - they never confirmed if the LC ones will work on the earlier air cooled bike ( if u plan of upgrading one day)

gist is - are these after-market one clever enough to get round a possible out of date ECU map or will these then play up if the bike electronics are updates (i think past 2016) ?

plus no one mentioned the 1250 yet ? nor when are we getting the R1300 and then proper cruise control... 2 years after the RT ?

The Rapid Bike Easy is connected inline with the signals leading from the O2 sensor, leading to the ECU, just like the AF-XIED.

I have never been up close to the RB-Easy. However, manipulating the O2 signals only, I don't quite see the need for two dials for adjustments. It could be that it works as an analogue unit (which is not ideal), but this would only be guess-work on my part. According to their website, the RB-Easy is able to handle up to two O2 sensors. (AF-XIED only handles one, thus two are required for the GS/GSA).

As for the AF-XIED and it's working or not working on the LC:
The LC engine was launched for the 2013 GS, and at the time, it was a Euro 3 emission standard engine. The AF-XIED worked just fine for these engines.
In 2016, Euro 4 was implemented, and amongst the 'new' requirements where a selftest of the O2 sensors. So this was not a cunning plan from BMW, it was what they had to do to.

This selftest is beeing done during the first seconds from engine start, as it requires the O2 sensor to be cold during the test. After start, the sensors are heated, thus, 30 seconds after engine start the test may no longer be possible.

The way the AF-XIED was designed, the O2 sensor is no longer connected to the BMS, but rather the O2 sensor communicates with the AF-XIED only, and the AF-XIED emulates the O2 sensor and transmits a modified signal to the BMS. Hence, the lack of direct connection made the O2 sensor selftest to fail, and ECU throws a faultcode and enters a limp-mode.

I have no knowledge how the RB-Easy handles the EU-4 engines.

Also, even if EU-4 was implemented for the 2016 and on, BMW ran a campaign that upgraded pre-16 bikes to also be fueld according to EU4, thus, even pre - 16 bikes with AF-XIED installed would run into trouble.

After a while, Nightrider (NR) launched a Relay box that allowed for bypassing the AF-XIED during startup. Since AF-XIED only would handle one sensor, this relay addition now increased the number of small boxes to 4...

Later, NR modified the AF-XIED to include the relay, thus, we where back to two boxes.

With the above mentioned modifications, the AF-XIED will now work on all the 1200 LC engines.

The 1250 has a totally different type of O2 sensor, and currently, the AF-XIED will not work for the 1250.

However, Rapid Bike has launched the RB Smart unit that they claim will work for the 1250.
 
thanks knutk, more great insights

I looked at the video above after replying - the Rapid Bike evo isn't a device I'd fit.
 


Back
Top Bottom