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  1. Theo

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    The main reason for which a more conventional fork diameter like 48 mm would sound better to me is that I think that with 43 mm there would be too much flex and therefore too much binding when the inner tube slides inside the outer tube. And, like you can read here, even at Luxon they think that...
  2. Theo

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    Josh Hill uses them with Surrons and does amazing things with them. Keep in mind that he does amazing things with the stock suspensions, too, though. The only electric dirtbikes I've ever ridden are Vargs and Talaria Stings. The suspensions in the Stings felt aweful to me; I don't know whether...
  3. Theo

    Bonnell 40hp and 60hp dirt bikes and e-bikes

    I won't comment about the bicycle, only the motorcycles. Things I like: • A controller which is made with EBMX, so maybe it can be bought separately, even if Bonnell can't provide it anymore, and hopefully still work. • A motor that also looks like one of those that can be bought for...
  4. Theo

    Interest poll: What kind of charger would get your money on the table?

    I agree about the fact that there should be an onboard charger for the EX. For the MX, A. Wass said that the battery could safely be charged at at least twice the speed, so let's say 7 kw. I would be interested in some kind of fast charger but only provided it can be used at the track: as of...
  5. Theo

    Stark Inverter Question

    Hey guys, I've found out some tech talks in the Lucid Motors' YouTube channel which are pretty awesome! Here is one in which they explain how their inverter works. It controls a permanent magnets motors which is roughly similar to the one of the Varg and probably a lot of what they say in this...
  6. Theo

    Stark Varg inverter cover removal

    Typically, in inverter assemblies of EVs, there are DC capacitors, used in the pre charge circuit. They won't discharge immediately after having been disconnected from the battery and they can kill someone who touches them if they are still charged enough.
  7. Theo

    AMA and Electric Motorcycles in AMA/FIM races

    I'm not an expert but I have learnt something about those batteries and I doubt that they could have available anything so different from what we have. Just check the specifications of the battery of the Ducati V21L used in MotoE, where probably they are willing to spend more money: the energy...
  8. Theo

    stark varg ex supermotard

    Now that I think about it, I've seen it on circlip mounts as well; probably you are right.
  9. Theo

    stark varg ex supermotard

    I never buy aftermarket front sprockets because I fear that they may damage the countershaft because of some characteristic of the splines. For example, the splines may be too hard or have an excessive shape error or the wrong play.
  10. Theo

    Stark Varg: Gearing for optimal range

    I like the idea of considering in which rpm range the motor is the most efficient, but I think that the AI has confused things here, since as far as I know the Varg motor is a purely permanent magnets motor, while the permanent magnets reluctance motor is a special hybrid solution used in...
  11. Theo

    Matt Burkeen: Like a stroller on an escalator

    What about this style @ 4:50?
  12. Theo

    EX Android app

    I agree, besides the speed on our speedometer is based on the wheel speed and I think that the reason for which I have recorded top speeds like 80 - 90 mph is revving in the air. I think that in motocross wheel slippage is too high to rely on wheel speed for power curves. Hopefully if we will...
  13. Theo

    Charging Varg EX remotely? Bike stored away from home..

    The following information holds good for my MX; I guess it should be the same for the EX. If you feel like leaving the motorcycle unattended while charging, which is against what is recommended in the manual, then you can just leave it plugged and set the maximum charge in the Varg app, so it...
  14. Theo

    Battery teardown, seeking help to reset the battery

    I'm not surprised: their policy about this, which to me looks completely understendable, is that the user should never open a battery. You've said that you repair EV batteries for a living and I guess you can confirm that opening a Stark Varg battery could result in someone dying. I am not an...
  15. Theo

    EX Android app

    I guess so, but on the other hand one would tend to think that you can do wonders with electronic devices since it's "just" a matter of programming them, so physical modifications should be needed seldom. The throttle could be adjusted so that up to a certain opening it behaves like in a certain...
  16. Theo

    EX Android app

    First of all, what I'm going to state is still moot since I've never set any power curve in my life. The top speed of the Varg EX according to the manual is 129 kmph, I guess at 14K rpm, so 140 kmph @14 K rpm approximates reality, then you can roughly say that every 1K rpm is roughly 10 kmph...
  17. Theo

    X Games Bans Electric Motocross Bikes In Bid To Become Even Less Relevant

    Here is a more qualified opinion of someone who also explains how electric motorcycles are somehow superior for FMX. Yes, he's signed a contract with Stark Future, but looking at the performance of the Varg in FMX I'd say that he's being honest: Here is my opinion, directly copied and pasted...
  18. Theo

    Varg Red Tube

    In some interview the CEO A. Wass said that there are actually more generations of those Power Tubes. Referring to my previous post, my bike now has 59 hours including 2 or 3 hours of enduro with some rocks and the rear Power Tube hasn't gone flat yet. I am considering bringing a set with me at...
  19. Theo

    EX Android app

    The red line is basically like a dyno chart of a Varg at full throttle. Like you would expect from a synchronous motor, up to half the rpms there is constant torque, which makes the power curve a straight line with some slope, since power = torque * rpm * a constant ane when torque is a...
  20. Theo

    Throttle and traction control on the Stark

    Not that I feel like doing it right now, but I think that another important piece of data to use for statistics is the total time of the races. We all know how motocross is also about stamina and at least IMO and from my limited experience, since I haven't ridden many bikes for long durations...
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