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ESP32 would do the job nicely. Could be a neat project for someone who has the time to do it.

The data port is CAN or something else? Can you pick up 12V or 5V from the same connector?

I think the motor to counter shaft gear ratio is 3.53 The speedometer assumes default sprocket count and tire size, so you can calculate the relationship between the shown speed and the motor RPM.

This is all from memory so I may be 500 to 1000 rpm off. At about 7000 rpm the voltage generated by the motor equals the battery voltage. To go above 7000 rpm the inverter starts to weaken the field (caused by the magnets on the rotor). At about 13k rpm 70 amps RMS is required just for field...

About those 20 pounds. I guess in Swedish that would be the fet varg. In all seriousness what is being done doesn't have any real effect on the mass. The prototypes are not highly tuned machines made with unobtanium and expensium that will then be switched to cheap metals for production. The...

It is not quite so simple. Let me try and explain. The first two bikes are hand built prototypes -- including hand built electronics, wiring, etc. Things that are designed initially to be hand built are not conducive for mass production. So we have bikes which are in a sense evolving -- they...

As I said, the DC/DC is not in the battery. We are not using the inverter to charge. Several things are done differently than in the Alta. The solution is simple and elegant; it is easy to package. Take a pencil and a piece of paper a play with a schematic if you like; you will likely figure out...

You might be able to get it down to a little over 5 minutes. I helped in a swap a few times (on prototype bikes) but we didn't time it. Some of the plastics had to be removed to reach the connectors, etc. We were careful when screwing the plastics back on because we didn't want to cross thread...

Call it what you want. A tool or simple jig; something to aid in battery swap. So, was it designed to be quick swapped? No - that was made abundantly clear. However, if you want to swap anyways, you can make a tool (simple jig) to make that easier. Nowhere did I claim "ideal".

I went and verified a couple of things. Some things have changed from the prototypes to the pre-production bikes. This is now more feasible (no danger of cross threading into battery case, etc). I suppose you could make a jig to make the swap easier and faster.

For the spare battery price I am the wrong person to ask. For the procedure be patient -- there are some differences between the prototypes and the preproduction bikes. That is likely why they are hesitant to give you an answer; they want to verify how long it takes on the preproduction bikes...

Let's try this another way. What is your reason for the quick-change? How often will you need to do it? In how much time must the quick-change be completed? If you need to do it once in a while it might be ok. If you need to do it very often the Varg is probably not the bike for you.

Sure, the 16 minute video is a marketing video with Anton in a turtle neck, but don't let that fool you :) There is a lot of info there. Look at it carefully and freeze it at certain points. The 3D models on the screens are the actual models; they are not made for the promo video. Battery case...

Here is a freeride E battery change in 15 seconds: Why don't you just buy one of those? It fits your criteria very well. From a major manufacturer so low risk and battery can be quickly changed... Note that the battery is up very high. A quick change battery in an MX bike can be done...

Another Josh Hill interview --

We are indeed making an effort. The design choices may seem unconventional but there are good reasons behind them. Another reason for these design choices is that this truly is clean sheet project. As for battery hot swap -- that would have compromised the bike in certain ways. Some people would...

The CEO (Anton) and CTO (Paul) both ride. The Alta was bought early on so that they could ride it and understand the differences of an electric drive train vs ICE on a motocross bike. The Alta was aimed at 250F, the Varg at 450F. Sure, there was some comparison early on, but the two bikes aren't...

The Yamaha and Honda e-bikes used frames designed for ICE. They cannot be competitive unless they abandon this approach and develop frames designed specifically for an electric drive train. I suppose they know this, but it takes real commitment to design from the ground up for electric. If you...

We don't need a (rear) wheel sensor. There is a rotor position/velocity sensor on the motor. Since there is a fixed ratio between the motor and wheel we know wheel position and velocity -- except for chain slop. In short, no need for an additional sensor as this functionality is already present.

Do not assume the Alta (or Varg) with a clutch will behave anything like an ICE bike with a clutch. When you have rotating mass there is potential energy that you can then transfer to the wheel using the clutch. There is very little rotating mass in the Alta (or Varg). So now we need a flywheel...