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  1. S

    A minimal Q76 offroad build

    You wind it like this, it's going to take 420 metres of 0.5mm enamelled copper wire which will cost me £10 plus maybe several hours, of which I have plenty at the moment. Worth a try considering the motors are toast otherwise.
  2. S

    A minimal Q76 offroad build

    Thanks but I'm going to change the motor and am trying to work out what might be the best option.
  3. S

    A minimal Q76 offroad build

    "But here is why I think it works for me. The low speed motor simply tolerates the slower speeds you get when you climb steep stuff. So the same 1500 watts or so I can get out of that motor can be used at slower speeds. It's not more power, or more torque. It's just less stalling of the motor...
  4. S

    A minimal Q76 offroad build

    A 5T motor has more torque and less speed than a 3T motor, the number of turns affects the RPM per volt so you can rewind a motor with more turns to get more torque and less speed at the same voltage. Prove me wrong here if you like, I see you are a very experienced user of the forum. Tell me...
  5. S

    A minimal Q76 offroad build

    If I was going to use a Bafang I'd just put it on a decent mountain bike frame instead of this cromo steel lump with 80s suspension design. Have been handed a dead MXUS which I am going to try and rewind for torque rather than speed. That could be quite a lot of fun if it works. Im talking to...
  6. S

    Andrew's LMX 161 Chain-drive massacre Build Log

    Ah right, thought it was like the one in my Raptor, didn't follow the link. My Sabvoton is unlocked for 200A so a 63A domestic breaker fits the bill nicely.
  7. S

    Anyone have any tips on rewinding MXUS 3k?

    LOL. Charming. I haven't done it before so I don't know what I need to know and was just asking for some help...
  8. S

    Andrew's LMX 161 Chain-drive massacre Build Log

    Nice work. The 63A breaker is rated for use at 240v, so its more like 200A for a 72v pack.
  9. S

    Anyone have any tips on rewinding MXUS 3k?

    I am going to do the rewind, so I'm looking for tips to do it properly, not naysayers telling me not to bother. You haven't seen the inside of either motor. There is only damage to one of the phases so its more likely a malfunction than overuse. If I get them working its a bonus if I don't I...
  10. S

    Anyone have any tips on rewinding MXUS 3k?

    Having taken a closer look it’s not going to be feasible to recoat the wiring so a rewind is my best bet. Have looked into it and it’s really not all that complicated. A couple hours work to save hundreds of dollars on a new wheel seems like a good payoff to me. There’s 750g of 0.5mm copper...
  11. S

    Anyone have any tips on rewinding MXUS 3k?

    There are a couple of hub motors around here that have been run too hot and then left to stand resulting in blackening of the windings in one particular area. One is an MXUS 3k and another is a similar clone. Needless to say they don't work any more due to current leakage between the wires...
  12. S

    A minimal Q76 offroad build

    Someone has suggested a MAC 12T motor which has high torque and should give good speed at 84v. Can anyone comment on how the power may compare to an MXUS 3K?
  13. S

    A minimal Q76 offroad build

    Thanks Tom, Something is definitely amiss then. It's got a Shinko trials tyre on a 19" Holmes rim so the weight is going to be about the same as yours, and the rear brake is Shimano Saint with XTR lever, a common mod that once used by downhill racers to get more power than any stock...
  14. S

    A minimal Q76 offroad build

    No you don't understand. The back wheel weighs 19kg, Thats almost 50% of the bike and is causing problems with traction and manouvreability - the rear wheel has so much rotating mass that the brake can't lock the tyre making it very hard to ride offroad. Instead of rolling over things the back...
  15. S

    A minimal Q76 offroad build

    The multistars can dump insane amounts of amps, thats why people use them. That looks awesome, well done! Does it still feel heavy at the back wheel? I can't even bunnyhop my bike at the moment let alone jump it, back wheel stays planted.
  16. S

    A minimal Q76 offroad build

    Frame: Q76 Forks: Rockshox Boxxer RC Shock: Rockshox Vivid Brakes: Shimano Saint Cranks: Raceface Chester Bars & Stem: Raceface direct mount 35mm Rear wheel: 19" Holmes MMP rim & Shinko trials tyre Front wheel: 24" Halo SAS & Vuelta 24x3" tyre Motor: Cromotor V2 18x4 winding 9.7kV Controller...
  17. S

    Adaptto Mini-E/Max-E Owner's Thread

    Great, I was sold a lemon by the looks of it. Was told I was getting a stunning deal, got it home to find most of the parts pretty heavily worn, rust inside the frame and then the controller fails after one ride. Of course the seller wasn't interested in hearing about any of the problems, when I...
  18. S

    Adaptto Mini-E/Max-E Owner's Thread

    Yeah I though that could have been a possibility too, but this happened halfway through a charge while the bike was stationary and the motor works fine with a Sabvoton. It only cogs when controller is turned on. This is the display, think its the newer gen: Thanks for the help, both of you.
  19. S

    Adaptto Mini-E/Max-E Owner's Thread

    @Allex; through the contact form on your website www.envolt.se Also sent a mail to the shop@adaptto.ru address via their website.
  20. S

    Adaptto Max-E Fault

    Anyone???
  21. S

    Adaptto Mini-E/Max-E Owner's Thread

    I still have a faulty Max-E that I purchased on a bike from another ES user a year ago. The controller failed after one light test ride and I have not received a single reply from anyone in my attempts to get it fixed. I’m asking again; can someone please help me get this thing repaired. I am...
  22. S

    Adaptto Max-E Fault

    Replaced the FETs and now the motor just cogs slowly while the unit still gives charging errors. Does anyone know someone who might be able to help troubleshoot this? Not getting anywhere with arranging a repair via Adaptto HQ 😕
  23. S

    Adaptto Mini-E/Max-E Owner's Thread

    Yeah, I'm trying to diagnose those other things. FETs don't just fail on their own, but I need to isolate it down to one particular component. I think changing all the sensors in the motor might be a better next step if nobody can shed any light on the fault. Losing another month and paying for...
  24. S

    Adaptto Mini-E/Max-E Owner's Thread

    Hi, On the previous page I mentioned a problem with my Max-E that happened while charging. Well I found the 3 positive FETs on the charging phase had all shorted so I replaced those but it still doesn't work. I thought it might have been a BMS problem so I removed the BMS from the system too...
  25. S

    Adaptto Mini-E/Max-E Owner's Thread

    Hi, On the previous page I mentioned a problem with my Max-E that happened while charging. Well I found the 3 positive FETs on the charging phase had all shorted so I replaced those but it still doesn't work. I thought it might have been a BMS problem so I removed the BMS from the system too...
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