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Bottom line - bike works great! After a lot of head scratching, I noticed the the connector (ACM to battery pack) was not well connected. Re-attached it and all work well (no need to flash anything). I apologize for the fake alarm, and thank everyone for their big help.

Will do that, thanks. It looks like the new BCU is a vanilla board with no fw at all. Perhaps we are trying to update a non existing firmware instead of installing the BCU's fw from scratch. Looks like the BCU have no version at all flashed on it. The blue lights are blinking on the board when...

Still same problem. Is there a specific order of components we should flash? Because we are waiting for a long time and it is still "waiting for target"

Still getting "waiting for target" for a long time. Seems like the BCU is unidentified, or something.

Got a new BCU for my EX. Installed it, and tried to flash the firmware with the Multitool. Ran into a problen, in which the bike can not finish the installation because it does not recognize certain components. I am attaching photos of the error windows. Any ideas?

this is the exact catalog name of the A pack's contctor - P105BDA P105-006 was a name probably used for Alta only, but they are the same.

A packs uses the P105-006 minitactors R packs uses the P125-007 minitactors

That will be a great help. These BCUs are failing, and finding a replacement is not easy. Please see uf you can also find blueprints for the A packs (EX. MX. SM).

Easiest thing would be to take the seat to a upholsterer, and have him redoo the inner material to your liking. Add material or take some out, replace some with a softer foam, and so on.. We have such a guy in Israel, and all short/tall riders use his skills all the time.

Sent PM

I would look at the Electric Motion Trial bike. That's a true professional bike. The Oset is a hybrid kind of bike.

I had a Zero FX with a belt drive. It was super smooth, but super unreliable for off road. Changed it to chain drive (Zero sell an aftermarket kit), and started abusing the bike off road without a problem. Off road pro machines like the Alta need a chain.

I actually don't race, but like you, looking to get into it. Hopefully next year. Where I live there are many Enduro instructors. It is advisable to take few lessons where you focus on body posture, braking, balance and so on. The sooner, the better, to prevent fixing bad habits. After that...

You described Shadetree surgeon's videos so well. It's hailarious. I am not certain as to what kind of racing you are looking to get into -Motocross? Enduro?

Wow, passing riders "Graham Jarvis style". Very nice!

Alta owners from around the world are jealous of you (trust me, I know). Have a great time, and try not to think about the rest of us - sitting alone in the dark... 😀

Someone in Europe made a Duke 390 & KTM freeride electric hybrid. The result is a commuter with the Freeride E electric power plant. Thought you guys might ne interested.

I agree that most chances are that the problem is BCU related. Just asking to be sure - no chance that the battery is completely drained? Here is how the BCU looks like on the older models. As Steve wrote, an Electrician friend helped me take it off.

I suppose that BCUs failures (and they do fail from time to time) are usually caused by the same electronic component fail. If we could find that component, we'll be able to fix most failed BCUs, and not replace them, as spare parts are getting sparse.

Amen to that. I can testify to that as someone who is going the exact same route with a malfunctioned bike at the moment. I get all the support & help I need from this group. I am sure my bike will be fixed. This is coming from someone who is on the other side of the planet (Israel).