• Warning!!

    Riding a tuned or deristricted EMTB is not a trivial offence and can have serious legal consequences. Also, many manufacturers can detect the use of a tuning device or deristricting method and may decline a repair under warranty if it was modified from the intended original specification. Deristricting EMTB's can also add increased loads for motors and batteries. Riding above the local law limit may reclassify the bike as a low-powered bike, requiring insurance, registration and a number plate.

    Be aware of your local country laws. Many laws prohibit use of modified EMTB's. It is your responsibility to check local laws. Ignoring it, has potential implications to trail access, and risk of prosecution in the event of an accident.

    UK Pedelec Law

    Worldwide Laws

    We advise members great caution. EMTB Forums accepts no liability for any content or advice given here. 


STUnlocker (ex Shimano STEPS Unlocker) Android & Windows App for derestriction/market change and etc

SEBA

Active member
Sep 11, 2019
357
135
French Provence High Alps
Yes, because when shimano got into the fight against de-restriction, for EP8 there was only 4.0.2 firmware (actually an alpha version), and all subsequent firmware for all motors was with "derestriction" blocking via Bluetooth. For all older engines there was already quite working firmware. EP8 (non RS version) motor works on 4.0.2, but shimano made many fixes/improvements so there is no reason to use 4.0.2.
thank you for clarification, i'm a bit late to ep8

Screenshot_2023-03-28-08-44-08-12_e2d5b3f32b79de1d45acd1fad96fbb0f.jpg
 

vadII

E*POWAH Master
Feb 19, 2019
794
576
Earth
if you have a link , you're welcome
Yes, I have it. Email me.

p.s. After Shimano and his lawyers fckd my brains out for six months, threatened me, blocked the STEPS Unlocker app, wanted to take the domain and even the stepsunlocker gmail mailbox I don't want to put anything like that in the public domain on my behalf. Apparently other thieving guys were luckier and didn't face threats from shimano ;)
 

SEBA

Active member
Sep 11, 2019
357
135
French Provence High Alps
Yes, I have it. Email me.

p.s. After Shimano and his lawyers fckd my brains out for six months, threatened me, blocked the STEPS Unlocker app, wanted to take the domain and even the stepsunlocker gmail mailbox I don't want to put anything like that in the public domain on my behalf. Apparently other thieving guys were luckier and didn't face threats from shimano ;)
... era of e8000 shimano said nothing and now there are lawyers ... so stupid to limit to 25 even 32 ...
 

texano999

New Member
Jan 14, 2023
100
17
Italy
So, I have tested the STEPSUnlocker - thanks a lot to Vadll for the great program and sending a free valid licence key!
I had 4.6.1 firmware and modified to US version (32km/h) and increased power in Boost mode to 600W yesterday which worked perfectly on the first run.
This morning I had a long test ride with the bike and after approx. 30 minutes in hard terrain, my motor stopped working and the display switched off in middle of riding the bike.
The motor was quite hot at this time, so I waited some minutes.
I tried to restart and the display then only showed the initial "Shimano steps".
Also additional attempts failed...
After walking quite a long way home with the bike, I then tried to access with STEPSunlocker which failed.
Then I tried to connect with eTube from Shimano and this program detected a broken drive unit (DU) and also could not connect to the motor - all other components were shown (derailleur, display, switches)
So I went to my dealer and he asked me quite suddenly if I had made "any modification" on my bike. Because I know my dealer quite well I told him that I used the tuningtool and he told me that the motor maybe could get broken due to the higher power limit.
Unfortunately we could not reset the power limit back to the old, original value, because we could not connect any more to the system.
So my dealer tries to get a new motor from Shimano and the motor is aready dismounted from the bike and on the way to Shimano, but for sure this is not the thing we expected.
So I hope that I will get a repaiered or new motor (on warranty?) and hopefully not have to wait that long...
Hope this does not happen to somebody else...
Have you tested this modification on the 2022 model or 2023?
 

Dirtyrig

Member
Dec 26, 2021
46
8
New York
If you are worried about straining the battery probably shouldn't be playing around with STunlocker at all. Giant's new bike and some Rotwilds give this feature to you with bike, choice to run as much or as little power as you want to (up to full power emtb on an SL format). I suppose it's possible to damage the battery but every bike has it's own BMS so I personally am not that concerned about it.

Max torque 68nm/450W max in boost, pretty bang on similar to my Levo in trail setting.
So I set it to full 85nm x 500W in boost and holy moly it was absolutely awesome!!! I rode it in boost for about 10 miles and 2500feet of climbing without a hiccup! The climbs at my local mtn are very steep, basically DH trails down and back up and I'm 200lbs, it worked like a charm! Thanks for the help!
 

Dirtyrig

Member
Dec 26, 2021
46
8
New York
Noticed something after the change with St Unlocker. I used to be able to switch between profile 1 and 2 by clicking on the EN100 button, but now when I click on the EN100 button it just changes between eco, trail and boost instead of switching between profiles, is this normal after changing with St Unlocker?
 

vadII

E*POWAH Master
Feb 19, 2019
794
576
Earth
Noticed something after the change with St Unlocker. I used to be able to switch between profile 1 and 2 by clicking on the EN100 button, but now when I click on the EN100 button it just changes between eco, trail and boost instead of switching between profiles, is this normal after changing with St Unlocker?
This is not related to STUnlocker at all...
 

Dirtyrig

Member
Dec 26, 2021
46
8
New York
If you are worried about straining the battery probably shouldn't be playing around with STunlocker at all. Giant's new bike and some Rotwilds give this feature to you with bike, choice to run as much or as little power as you want to (up to full power emtb on an SL format). I suppose it's possible to damage the battery but every bike has it's own BMS so I personally am not that concerned about it.

Max torque 68nm/450W max in boost, pretty bang on similar to my Levo in trail setting.
Are you still able to switch between profile 1 and 2 using the EN100 button after using ST Unlocker? For some reason my EN100 is only changing between eco, trail and boost after using ST Unlocker. If its still working properly on your bike I may have done something to the EN100 🤷‍♂️
 

squeegee

Well-known member
Aug 19, 2019
373
281
USA
Are you still able to switch between profile 1 and 2 using the EN100 button after using ST Unlocker? For some reason my EN100 is only changing between eco, trail and boost after using ST Unlocker. If its still working properly on your bike I may have done something to the EN100 🤷‍♂️
Never was able to switch profiles with EN100 since I've had the bike. The button only changes assist modes.
 

SEBA

Active member
Sep 11, 2019
357
135
French Provence High Alps
ep8 4.1.10 ( latest) flashed after gone deristrict with 4.0.2 ( 32km us market and 2000wheel size+5%spd) seems seems to work

ep8 can pull 100nm and 600w peak ? (settings can go to that)

my old trusty e8000 can pull 75nm 600w
 
Last edited:

mxkauai

Member
Jan 12, 2019
40
15
Hawaii
Can STUnlocker be used to set up a new replacement e8000 motor? I believe with set up wheel size, motor orientation and location need to be set.

I have just purchased a replacement motor and the only shop on island I live is a shimano dealer but does not do any work on there ebikes. They ordered me the motor but that is it, the rest is up to me. Trying to avoid buying the PC link.
 

texano999

New Member
Jan 14, 2023
100
17
Italy
I have noticed manual updated in Stunlocker app for**** ep801 : EP801/EP600 are not supported for the derestriction. This derestriction i Guess is for speed limitation correct?
Overall Torque/Power is not reported as a feature for ep801
Is this mean that app can not work to change power and torque limit of the ep801 RS motor? Has been this checked by anyone?
 
Last edited:

esselite

Member
Jan 23, 2023
23
68
Poland
ep8 4.1.10 ( latest) flashed after gone deristrict with 4.0.2 ( 32km us market and 2000wheel size+5%spd) seems seems to work

ep8 can pull 100nm and 600w peak ? (settings can go to that)

my old trusty e8000 can pull 75nm 600w
So you want to say, you have derestricted on older motor firmware and then upgrade the firmware to latest version and derestriction stayed as was before upgrade?

What is your GPS speed with this setup? Are you on 29 inch wheel?
 
Last edited:

esselite

Member
Jan 23, 2023
23
68
Poland
I have changed to US only market and give it a try. If not satisfied, then will search for best circumference and speed correction.
Screenshot_20230406_210833.jpg
 

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