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  1. DonCox

    Sur Ron Ultra Bee

    That is why many of us are going to a solid dirt bike and mod-ing them to Electric. The QS Motor , and ME motors on YX250F frames, the QS motor on CRF frames, the QS motor on RM frames. the QS motor on KX100 frames. All of these have known ride quality, and tons of aftermarket good stuff...
  2. DonCox

    Newbie need advice on a generator

    Unfortunately you are right on the Lighter weight model. Shipping is stupidly priced. The heavier one is sold from an Ebay store in So.Cal with free shipping. I bought a 3500Watt gen from them. It was a good experience. Here are reviews of the generators. The lightweight 240VAC MXR6250...
  3. DonCox

    Newbie need advice on a generator

    I have my order in for the Stark also, and I will be needing a 240V power source to charge it at the track. Here is a Inverter Generator that puts out 21 Amps at 240V, and only weighs 86lbs. I bought one of there other generators, the MXR3500, only 120VAC, and it has worked out really well for...
  4. DonCox

    General Varg Beater

    We built a 2017 KTM 150SX into an electric with the QS motor. It has a 4.8KW battery. It is 245lbs. It has twice the battery that the RM250 had in the Hare Scramble above. The RM did the 12 mile lap and had about a half a lap left in it on the 2.4KW battery ( approximation, since it was...
  5. DonCox

    General Varg Beater

    To this point, I will include a YouTube that is in other discussions, and illustrates the concepts talked about above. This is Derek Timm's RM250 frame with the new motor many of us are using for it's light weight, and high power output. He has a 2.4KW swappable battery on this bike, that...
  6. DonCox

    2001 RM with QS138 70H V3 motor and Votol EM200 Controller at an Enduro

    A friend in Florida who has ridden quite a bit in the Florida area, before on I believe a SurRon type bike, put together a simple but very effective full size electric bike to run the Florida type Hare Scrambles. About a 12 mile (20 minute lap) with the ability to swap batteries each lap. He...
  7. DonCox

    General 72V 50aHr pack of Molicel P42A cells connected with copper

    Here are the connectors that I use. They have a screw on each side. This is a only 2 but there are usually 5 or 6 side by side. I use every other one. Here are the ones on Aliexpress. I haven't used these yet. But I think 2 of these for B+ and B- and a smaller one black for the Charge...
  8. DonCox

    General 72V 50aHr pack of Molicel P42A cells connected with copper

    What is going to be the dimensions of this battery. I need approx. 8' x 8" x 12" With connectors at the rear, like Bob Casper mentioned in one of your links on this site. Here is a sketch.
  9. DonCox

    2010 CRF250 with V3

    Here is a short Drone shot of the Glen Helen MX Park in San Bernardino, CA. This was Dec 22, Thursday Practice day and all 3 tracks are open. https://youtube.com/clip/UgkxuqBcXXPEYV85wMtledLcx1RdUd3ShqhM Maybe Bob can answer the question on Battery levels.
  10. DonCox

    2010 CRF250 with V3

    Here is a YouTube of Bob's new 2010 CRF on the REM track at Glen Helen. His son Casey can really RIP on any bike, but he sure looks good on this.
  11. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    No I haven't used the 90H gear reduction unit. It is wider than the 70H motor, so you will have a bigger problem with the brake pedal, the motor is heavier, and there is right now more power than I need in Mode 3 with a 70H motor at 350 AMPs and I can go to 450AMPs if I ever need it. I am not a...
  12. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    Yes I do. Molicel/NPE INR-21700-P42A 45A 4200mAh Flat Top 21700 Battery - Authorized Distributor They have them and with quantity discounts. Building your own batteries is very tricky and can be dangerous, I would find a prebuilt. Here are some ideas with those cells. These cells seem to...
  13. DonCox

    TCMB371 Video Thread

    Great videos. I like the telemetry , I will have to see if I can add it to my GoPro. I see the links above Thanks
  14. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    ProperHooligan, what a great name. You are getting the best kit out there right now, from the guys at ElectroandCompany. I'd be glad to help you. I answered a lot of these questions for another person in a private discussion, so I just copied it and will put it here. I am sure you will have...
  15. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    I charge mine with 2 chargers. The battery is divided into 2 packs. Each pack is 72V 21ah. Each charger is 72V ( nominal 84V peak) and 10A. I use 2 smaller ones to allow charging on 120VAC. Any larger than 10-12A and you need 240VAC. It takes about 30 minutes to go from 50% battery to 80-90%...
  16. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    If I built another KTM, I would use the same cells, Molicel P42A. Right now they are less expensive for the amount of energy they pack. The Yamaha is running an older battery type, Sony 18650 VTC6. They do provide the current, 30A, and 3000w of capacity. For less money per cell, the Molicel...
  17. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    Thanks Frank. Sounds like you are deep in the electric bike world. It sure is fun. I'm not going for the quads on a SX course, but this has plenty of power for my riding. Your statement about riding is so true. I've always ridden in some way , crashed enough, but kept riding. I sure was...
  18. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    The person I built the KTM for, loves single track and is super jazzed on that bike, so he built another CRF150 for his kids. With the 63AH battery, he gets about 40 mile of single track riding on the KTM. So far so good, on the motor holding up. At 350A on mine , I have put over 100 laps on...
  19. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    Here is me on the YZ in Mode 2 250A at The Cahuilla Creek Vet Track. I qualify, I'm 77 A friend said I'm going need a Lawyer for that last case....:cry:
  20. DonCox

    YZ250F 2014 Build With QS 138 70H V3 Motor and 450A controller Part #1 and Part #2

    The power on my YZ is only about 35hp ( 370A at 72V = 27KW=35hp) There are pluses and minus's to that power number, but the torque is the fun part. I ride most of the time in 81 to the 72V range. If my battery was larger, like the KTM 2017 150SX I built , 63AH, It can provide 450A at 72V for...
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