Recent content by spektrolyte

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.

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

"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...

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...

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...

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.

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...

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

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...

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...

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...

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?

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...

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...

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.