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  1. J

    Addind 10 more amps of capacity and bigger connectors

    Yeah I’m a realist I don’t expect to double my runtime and acceleration and speed just by doubling the batteries capacity. The only reason I’m suggesting that it will be better is because the manufacture clearly states to run it at 72V 20A minimum. Thanks again for the insight.
  2. J

    Addind 10 more amps of capacity and bigger connectors

    Thanks for the fast reply guys. Yes the batteries are getting a little warm that’s what made me think of using a bigger connector for less resistance. You’re right xt90 connectors are cheap and I have plenty of them. The batteries sit on top of the rear bike rack with Velcro and battery straps...
  3. J

    Addind 10 more amps of capacity and bigger connectors

    I have a mongoose dolomite fat tire bike and I replaced the rear wheel with a 72 V 3 kW motor hub. It is awesome. Has plenty of torque off road and a good top speed of about 44.9 mph. I'm only using 3 multistar 6s 10a 10c lipos wired in series For 72 volts and I'm using XT 60 connectors. Going...
  4. J

    16mm torque arms

    My latest build is a 72 V 3000 W rear hub motor and controller. The axles on this monster are 16 mm. I can't seem to find any 16 mm torque arms anywhere on line. Are any of you guys that are running a high powered system fabricating you're own 16mm torque arms? If you bought 16mm torque arms...
  5. J

    Best way to narrow shorten tighten Drop Outs

    My rear drop outs are 190mm. The rear hub motor axle is 170mm. What is the best way to shorten, tighten, narrow the rear drop outs 20mm? Im guessing to use washers are evenly tighten the axle nuts back and forth? Frame is steel so bringing it in an inch shouldnt be a problem right?
  6. J

    Mongoose Dolomite Fat Bike 72V 3kW Options

    I recently bought a Mongoose Fat Tire Dolomite bike for a rear hub conversion. Im having a problem finding a rear hub motor that has long enough axles. The rear dropouts on the Dolomite are 190mm. Ive heard from some on here that you can push the frame in a bit to make it fit a 170mm axle...
  7. J

    Fat Tire E bike Conversion

    Thanks for the advice. How many mm are the dropouts of your fatbike and how long are the rear hub motors axle? My Mongoose Dolomite rear drop outs are 190.5mm. I cant seem to find a rear hub motor that has long enough axles? I cant seem to find The Mxus rear hub that you have locally or in...
  8. J

    18650 VS Lipo

    Maybe its me since I come from a long lineage in RC. Ive been using lipos for a long long time. The biggest I have are 6s 13A 35C(supposedly) and 6s 10A 10C. These batteries are dirt cheap thru Hobbyking. I paid $50 per 6s 10A 10C lipo a few months ago and bought 6. For 300.00 bucks I cant...
  9. J

    Mid Drive OR Rear Hub?

    Just got a 26" Mongoose Dolomite Fat Tire Bike for my next build. Going to use a Luna Cycle 72v 3kw or 72v 7.5kw Cyclone mid drive, OR a 72v 3kw rear hub. What do you think is better suited for off road, a mid drive or rear hub?
  10. J

    Mid Drive Motor changing gearing changes gear ratio?

    This is probably going to be one of the dumbest questions posted on endless sphere today. If you are using a mid drive motor in your E bike, when you change your gearing while you are moving along, does that change the gear ratio going to the mid drive motor? I’ve built several rear hub E bikes...
  11. J

    Fat Tire E bike Conversion

    I just finished my first e bike build using a 48V 1500W rear hub. Im 6'4'', weigh 205 pounds and it will pull me up some big hills off road and on. However, I want more power. Something in the 3-5kw should do the trick. Have anyone of you guys used a fat tire bike for an e bike? I dont care...
  12. J

    Model 3

    Wow congrats and awesome thread. Im in the process of configuring mine also. Im not rich and this will be my most expensive auto purchase by a large margin. I deliver for a restaurant. I also put about 30K a year. Im a little concerned by this form regarding using a Tesla model 3 for work...
  13. J

    E bike Gearing Why Bother

    Wow, you guys have charts and data, excellent. Ferro fluid, never heard of that before for over volting a motor, thats awesome! Thats why I love and post on forms like this, I always learn something. As I stated earlier, I got rid of the derailleur and chain all together. Im 6'4 and about...
  14. J

    E bike Gearing Why Bother

    For anyone building their first ebike, its a relative cheap and painless process. Ive since removed the gearing from the bike as well as the chain. I didnt have to connect the PAS or the speed limiter. Rides great off road and on road. Im 6'4 and 195 lbs and it tops out at about 35 mph on...
  15. J

    E bike Gearing Why Bother

    Haha I hear ya. I actually have the opposite problem. I have a high metabolism and have trouble putting weight on. People say the older you get the slower your metabolism but I would argue that also since Im in my 40s. Im 6'4 and 195 lbs and still wear the same size pants when I was in high...
  16. J

    E bike Gearing Why Bother

    Yeah I should of looked harder at more powerful hub motors. I dont think 1500W is powerful enough but you gotta start somewhere. I also stumbled upon a Sur Ron e bike that looks good as does the KTM e bike line. It seems most of the e bikes out these days are way to under powered. 250W -...
  17. J

    E bike Gearing Why Bother

    Thanks for the info guys, I appreciate it. I installed the freewheel cassette onto the rear hub and have it installed. I figure Ill try it with the gears first and see first hand if it makes a difference. My gut tells me it should but since this is the first hub motor Im installing I dont...
  18. J

    E bike Gearing Why Bother

    Are any of you E bike guys using just one gear for off road and on road? Im finishing up my first Mountain 26 inch E bike build. Im using a Voilamart 48V 1500W rear hub motor. Ive electrified, fabricated, and modified quite a few push scooters and peddle go karts to E vehicles. All my other...
  19. J

    Pedal Go Kart to Electric Go Kart

    My friends son dropped off an old pedal go kart a few weeks ago. Finally got around to starting this project. Ive converted several E scooters and made an RC FPV lawnmower 2 years ago without to many problems. This however is my first electric go kart conversion. The picture below is after...
  20. J

    My kick scooter project

    thanks for the input. The same volts and amps I would think the opposite on the brushless motor cuz it'll be running at lower RPM. I'm not sure though because I haven't read it yet. not sure what the lipos in a bag are tough. I'm using 2 6 s lipos in series. no problems with those at all...
  21. J

    My kick scooter project

    Good tip for the Kapton tape. Took me about a 1/2 hour but I finally figured out the on off controller switch using a voltmeter. As you can see from the pics, the Controller tells you nothing. Have to finish installing the bullet connectors on the controller and motor and finish the motor...
  22. J

    My kick scooter project

    Thanks for the offer. My tire size is 9 inch with a t8f 44 wheel sprocket. I also have a 10T,11T and 13T motor sprocket. Yep, the gearing selection is quite limited. I was running 11/44 on the 48V 1000W motor. Was getting about 20 mph on flat and 18 mph up severe hills around my way. Temps...
  23. J

    My kick scooter project

    Yeah I found it. About a 4 to 5-1 ratio. Nice thread but I wasn't going to wade thru 17 pages for that info...lol. No big deal, its not complicated or rocket science were are working with here. Simple math but you would think that people selling these scooters would have spec sheets for this...
  24. J

    My kick scooter project

    nice build thread. I just bought the motor and controller that you have from hyper sports for a project I'm working on. it's a 1600 watt brushless motor and controller 48 volt instead of 1500 watt. can you tell me what your stock gearing is on the scooter? what it came with from the factory...
  25. J

    Motor Temperatures

    Coming from an RC background, most people say that any motor temperature under 160° F is great. Anything over 200° F is killing the motor. Since Ive only built 2 EVs to date, I was curious over this. According to a lot of research, pending on the insulation levels, some motors are safe to...
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