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konrad

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Posts posted by konrad
 
 
  1. 37 minutes ago, lemur said:

    You're not going to get more power out of the same motor....

    That's not true.  Power is proportional to torque times RPM.  Increase the voltage available to a DC motor and you can increase its maximum RPM capability.

    Whether or not that will improve an Oset, I have no idea.  Whether or not the reliability of the Oset system degrades to an unacceptable level, I have no idea. 

    I've outlined some basics here (and in subsections): https://www.electricmotiontech.com/home/ev-tech-101

  2. I have zero experience with Osets, but can you open the controller and have a look inside?  

    The DC link capacitors (large electrolytics) will have a voltage rating written on them.  The power MOSFETs will have a part number that you can search to find a datasheet that will specify its maximum voltage.  In both cases, you want to have a safety margin between their ratings and your maximum operating voltage.  The closer you cut the safety margin, the worse the long-term reliability.

    You can buy electronic speed controls (ESCs) for electric bicycles very inexpensively.

  3. 3 hours ago, DMacLeod said:

    Yes, I bought the domino from the dealer. Tested both the magura and domino the other day on a steep hill, stopped at the bottom and full throttle up. I couldn't tell a difference in performance when tested back to back.

    Interesting.  If you don't mind wiring the EM-specific connector yourself, throttles are available for less than EM's retail price.

    https://www.electricmotorsport.com/magura-twist-grip-throttle-w-matching-grips.html    $95

    https://www.electricmotorsport.com/domino-twist-grip-throttle-with-microswitch.html    $120

    I've purchased the Magura as cheaply as ~$40 on eBay.

     

  4. I did not realize Scorpa was making those in 1995.  Can you post a picture of the engine?

    The 175cc 4T Scorpas I've seen in the USA were based on the Yamaha TT-R125.  But the TT-R was not introduced (here at least) until about 2000.

    I've owned several TT-R125s over the years.  They are excellent engines and easy to work on.

    The Chinese pitbike motors were patterned after Honda designs.

  5. 3 hours ago, Johnno said:

     I’m an aeronautical engineer....

    Well, that makes you the perfect EFI OSSA owner.  Congratulations on the rapid repair.  Thanks for giving feedback.

  6. That was my first trials bike.  I have attached Jim Snell's wiring diagram.  Pretty sure I had to replace the thermo-switch at some point.  Best way to test the fan is by connecting it to a 12-volt battery.  The regulator (Transval) is probably a Zener diode clipper.  Remember that any voltage you measure without its load (fan) will be somewhat higher than when it's loaded.  

    The thing Snell calls the DC Converter is just a bridge rectifier.  Here's a YouTube on how to test it.

     

    kokusan-96-2000.gif

    • Like 1
  7. On 4/17/2024 at 1:18 AM, Johnno said:

    ...when should the pump run?

    The somewhat flippant (but accurate) answer is: When the ECU tells it to.

    Removing the pump is a total PITA.  I strongly suggest you test the pump with a 12-volt battery connected to the bike's diagnostic port.  A 2014 Explorer will have the 6-pin diagnostic connector.  See: https://www.ossa-efi.com/home/pc-software/diy-diagnostic-interface   Just connect a battery to the Batt+ and Batt- terminals shown.  The pump should run for a few seconds each time the battery is connected.

    Eventually, you will want/need to build a complete diagnostic cable.

     

  8. Regarding the steep deprecation, Mecatecno has a "radically different sales philosophy" than Electric Motion. At least privately, Mecatecno is claiming that it will always be possible to update the electronics and every part and accessory. They feel this is key to their approach and a strong sales argument to share. I guess we will see what the future holds.

  9. Two different manufacturers.  Seems unlikely to me.  Post some photos of your Olle internals.  What is the distance (completely unweighted) from the center of the axle to the top of the stanchion?

    Where would you buy Marzocchi internals anyway?  A complete fork swap seems more doable.

     

    Or are you asking if the fender, caliper, and wheel will swap over?  That is very likely to be a bolt-on operation..

    • Like 1
  10. 13 minutes ago, nhuskys said:

    Their logic for this is the different requirements for 120v charging in the USA add cost.

    Seeing as how EM buys a standard charger out of China, their logic is severely flawed.

     

    Oh, and just to be clear, I'm shocked that it could cost only $12k USD.  I had been anticipating something like $16k (not saying I think it's worth that, however).

  11. 2 hours ago, ChrisCH said:

    Available to pre-order today.  Not as much as I expected.  My piggy bank might get a raid  😁

    https://inchperfecttrials.co.uk/products/2025-em-epure-factor-e-1-8kwh

    When I follow that link from the US, it says, "$11,980.00   Tax included.  Shipping calculated at checkout."

    Yes, dollars.  I realize your price includes VAT, whereas mine would not.  But that can't possibly be right. 

  12. Just added a section to my website on identifying model years based on VIN and motor number.

    See it here: https://www.ossa-efi.com/home/factory-documentation/model-year-identification

    I would love to gather more examples, and possibly even create a registry of where bikes are roughly located.

    If you don't want to share your complete VIN, even the 10th character would be helpful.  Likewise for the motor number, the two characters after the "I" would be helpful.

    I'm especially interested in finding examples from 2015. 

    Feel free to contact me by PM.  

 
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