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    Media Review Media Week in Spain - Electric Cycle Rider

    The software is behind the hardware (because in this case you need the hardware to write the software). To really push the bike -- especially with the media riding it -- the software needs to be more mature. The last thing you want to do is change the software from day to day while the press are...
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    Media Review Media Week in Spain - VitalMX Review

    It is considerably more powerful than the Alta. A number of riders have ridden both bikes. If it was less than the Alta the media would rip it to shreds.
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    Varg Radiator placement

    There is a fan. It is an actual radiator fan designed to be exposed to the elements -- not some computer fan. The electronics measures fan current draw and warns you if there is some problem with the fan. During charging the coolant pump and fan is controlled to bring the coolant temperature and...
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    Alta Killing Alta

    First, let me state this. Alta is the first legit electric dirt bike. Second, the "IP" that BRP acquired is just about completely without value. This is not because Harley holds some blocking methods by which they can screw BRP. Where are the design and R&D engineers? The pieces of paper and...
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    General 15:50 Gear Ratio on EXR

    They are not stupid questions. I do not have an Alta so I cannot check. Perhaps the bike spits data out on CAN regardless if multitool is connected or not. If somebody connects a CAN dongle to it and there is a bunch of traffic on the bus then the bike is probably spitting out the data and...
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    General 15:50 Gear Ratio on EXR

    I have played around with a non-rooted phone running Termux. I got it to use a USB serial device (normally /dev/ttyACM0) under linux, but it didn't show up as such device. I hade to use libusb to get it to work. Also, it doesn't work on every phone. IMO, that route is painful. It is much easier...
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    General 15:50 Gear Ratio on EXR

    Is there some sort of published protocol or does it need to be reverse engineered? It would be much easier to just pipe CAN to WiFi or bluetooth and do the processing on the phone.
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    General 15:50 Gear Ratio on EXR

    ESP32 would do the job nicely. Could be a neat project for someone who has the time to do it.
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    General 15:50 Gear Ratio on EXR

    The data port is CAN or something else? Can you pick up 12V or 5V from the same connector?
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    General 15:50 Gear Ratio on EXR

    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.
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    General 15:50 Gear Ratio on EXR

    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...
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    STARK VARG (Something new is coming!)

    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...
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    STARK VARG (Something new is coming!)

    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...
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    STARK VARG (Something new is coming!)

    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...
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    STARK VARG (Something new is coming!)

    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...
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    STARK VARG (Something new is coming!)

    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".
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    STARK VARG (Something new is coming!)

    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.
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    STARK VARG (Something new is coming!)

    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...
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    STARK VARG (Something new is coming!)

    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.
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    STARK VARG (Something new is coming!)

    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...
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