I don´t understand the question. What is your current motor firmware and is your EP801 modified already with the EMAX software, so the bike runs faster?
I read it that they fitted a Di2 Derailleur, so selected the Electronic Derailleur in Emax, giving them Autoshift, as you cannot do this with customer copies of Shimano ETube.
Thanks, that makes sense. So "they" changed the type of derailleur to "electronic" with EMAX software and then did the AutoShift configuration in E-Tube-Project. That makes things clearer to me.
I read that his concern is, that he modified the motors configuration with Emax, rather than with the Shimano ETube software. Because only the Shimano Mechanic's version of ETube could have made the changes he needed.
Yes, if @a_double has used EMAX just for changing the derailleur type, then he easily can update to a newer motor firmware without any problems or negative effects and the changed configuration (e.g. electronic derailleur) will stay the same.
If you will update an already EMAX speed optimized DU-EP801 or DU-EP600 based bike to a newer original motor firmware from Shimano (e.g. the currently latest version 4.3.0), then the increased max. motor support speed will be gone and the bike will be reset back to 25km/h (if the drive unit was originally factory set to EU mode) or 32km/h (if the drive unit was originally factory set to US mode).
]On my DU-EP801 based bike am on max. motor support speed of 50km/h since many months already and enjoy it a lot, see e.g. here.[edit: wrote this before reading what backflip wrote. He likely knows more than me
I believe eMax modifies the official firmware images to override the speed limiter. Quite a feat to figure out what bits - literally - need to be flipped. That’s why you can’t install the eMax image normally - the installer likely calculates a checksum from the image to ensure it’s not corrupt or modified.
Similarly, I believe if you want to upgrade to a newer firmware version, you need follow some procedure eMax provides.
That said, it seems a_double and I are using eMax just to tweak the configuration with the existing official image. I bumped my RS motor to max torque and power, and more recently enabled autoshift feature.
Whatax speed do you run at?
Take care: The 12 gear version RD-M8150-12 only has limited AutoShift functionality and this will only work when coasting (without load on the chain, due to the small chain and sprockets and the Hyperglide+ technology, see here). If you really want to get full AutoShift functionality (which in my opinion is not a real must on a real MTB, but more on an Urban bike), you need to use the 11 gear version RD-M8150-11 (and for sure the related 11 sprocket cassette) with the LinkGlide technology which is much more rubust for (automatic) gear changes under full load, see here.
Thank you for your quick reply, answer and all the information. I would like to get it’s full potential. Just to be clear, do I just need these parts to make the change to di2 11 speed?
Please first verify (and give reply) that you have the SC-EM800 display mounted on your bike or not, because depending on the display type and battery type, the other components have to be selected!
Hmm.. maby going the easy way with the 12 speed is a better option in this case then. My bike does indeed have the SC-EM800 display. Oldschool shifters make sense hahaPlease first verify (and give reply) that you have the SC-EM800 display mounted on your bike or not, because depending on the display type and battery type, the other components have to be selected!
Again, carefully check the previously linked compatibilty document of Shimano.
It takes some time to get down to the insights of this document, so be patient and also read the small letters - this will avoid that you will buy the wrong components.
I cannot write anything to the mechanical components, because I am not a "mechanical guy", my focus is on electronics, firmware and software.
However, at least you most probably need a new linkglide compatible chain and also should check if your currently used chainring (the front "big sprocket") is compatible with the linkglide technology from Shimano.
Also you have to take care of the so called "chain line" (see e.g. here) but that is not my stuff too. These are all mechanical issues, but you need to assure that these components will match to each other, otherwise your Di2 experience may not be that great and you will get nasty noises and bad (non-precise) gear shifting in the end.
As written before, I would never use AutoShift on a "real" mountain bike like yours, because I always want to shift exactly by myself and never would want that the AutoShift functionality would change gears automatically if I am in "hard terrain".
This is why I only use the (in my eyes perfect) RD-M8150-12 derailleur with 12 gears since quite some years now (I think I was one of the first users of this derailleur worldwide).
FreeShift is awesome (but you have FreeShift - functionality on RD-M8150-12 and RD-M8150-11 in the same way).
The selection of the cassette is up to you - I would prefer the 11-50teeth one because with this you have more "dynamics".
SW-EN600-R and SW-M8150 are up to you also, however I only would select the SW-EN600-R if your bike is fitted already with the (similar looking) SW-EN600-L unit at the left hand side.
But I am quite sure that your bike is using the SC-EM800 display (and because of this no SW-EN600-L control, because SW-EN600-L and SC-EM800 cannot be used at the same time on a bike) and so most probably I would select one of the "real" and classical SW-M8150xx shifters. They are a great choice and give you some cool "oldschool" shifter feeling with a new touch.
Regarding cable length: If you are using an SC-EM800 display, this display has 4 receptacles in total and mostly 2 of them are not used currently. So you need one short cable from the display to the right hand side gear control unit, e.g. SW-M8150xx. Depending if this cable will be inside or outside of the handlebar, the cable length may differ. Use one which is long enough.
Then you need another (mostly much longer) cable which will connect the drive unit with the rear derailleur. It can be a quite time consuming process to get this cable correctly mounted inside the frame. Most probably you have to dismantle or at least lower the drive unit for this and so need some related tools to do so. Also take care that this cable will not be squeezed from moving parts while riding.
After you have correctly mechanically and electrically mounted this equipment, you most probably will get an E903 error in the display when powering on the bike.
Now take the correct adapter cable from the SM-PCE02 interface (take care to order this interface in the newer packaging version which already includes the newer adapter cable with the new small SD300 plug, see in chapter 3.2 of this document) and connect this cable to the last non-used receptacle of the (most probably) SC-EM800 display and then you can use the latest version 2.60 of the Windows based miniMax program already in the licence key free (and so free of charge) version to configure your new perfect derailleur correctly and have a lot of fun with your bike.
Many thanks for your help!
I have the EM800 display and 12 speed transmission.Hmm.. maby going the easy way with the 12 speed is a better option in this case then. My bike does indeed have the SC-EM800 display. Oldschool shifters make sense haha
Thanks for your effort and info! I will go this route
Did u take your bike to je James cycles in Barnsley by any chance
I see you have a derailleur extension. This is always needed for the Di2? I love your rear mudguard. Where can I get it?
I'm not sure what you mean by an extension. I added nothing to the derailleur. It's a stock XT Di2 derailleur.
Good dude! highly recommend
Nice clean setup! I've got almost the same components and want to install this on my Stevens 9.7.2. FR with the same EM800 display. Did you use a junction box EW-JC304 SD300 between your M8150IR shifter and motor or did you directly put the shifter (with a sd300 cable) in the display? And so, did you ever get any error codes? Thanx for your reply.
You easily can connect the SW-M8150-xx shifter via an EW-SD300 cable directly to a non-used port of the 4 ports in total of the SC-EM800 display (it does not matter which ports you are using, because all of them are equal in functionality) . So, no extra quadruple EW-JC304 adapter is needed. Ideally also order a cheap TL-EW300 tool, because this makes the cabling work much easier.
The motor cable ran to the handlebars. So I ran it to the EM800, which has the 4 port junction. Then a cable back to the top tube switch, then on the handlebars, one to the shifter, and one to the mode switch.
Thanks guys. I couldn't find any material where this is stated but it's pretty logical. (ChatGPT and Gemini first says it's impossible.) Saves me from running a cable thru my frame + a junction and makes installing a lot more easier.
