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Forums are the best source of info. People try different things and figure out what works, The main factor is how you use it. It's high power at low speed (especially stopped) that kills controllers and motors. Burnt motors are very rare these days. It happens a lot with RC models because...

People have already written books on the subject. They're a complete waste of time. By the time the bool is written, everything changes, and what they say only applies in specific limited circumstances. Everything you need to know is written in this forum. All you have to do is find it. Also...

Show us a link to the bike.

Firstly, if you stay at 24v, a lithium battery would need to be able to supply at least 20A continuous. 25A would be a lot better. many of the cheaper lithium batteries are only rated at 15A, so be very careful to check the listing. Like Neal says, you'd need a new controller to go up to 36v. I...

We need more people to do these sort of things. I can remember 9 years ago a guy made this carbon bike from scratch in his shed on the Gernman pedelecs forum. It used a cut down Tongxin motor as a mid drive. Where's the UK talent? The nearest we got was Cwah 's dahon Jetstream, which was pretty...

Well done everyone. Now see if you can hack the speed limit. One guy has already done it, but it could be tidied up with a bit more code and another input and output. He did it by splicing in to the speed sensor wire in the motor cable and using a speed sensor on the crank, which gave about 1/3...

The torque arms are OK, but the motor's upside down. The cable should go downwards to avoid converting your motor into a fish tank. It really worries me that I can't see any disc brake. Rim brakes are just not going to hack it. If you have a wife/family, make sure that you have good life...

Yes they do. No, it won't work. I think even 15A is stretching it for that motor unless you're quite light and always go fast, otherwise 12A. 20A is about the maximum for an AKM128, which is twice the size.

How exactly does it work? Does it give proportional speed control throughout it's range or just a maximum power boost? Does it regulate the speed downwards from the PAS setting too?

The throttle connector.

250w or 350w means nothing. It's just a label on the motor for legal compliance. In some cases, motors stamped 350w are identical in all respects to one stamped 250w. The power doesn't come from the motor. The controller decides how much power you get and the battery provides it. Some 250w...

They're great bikes when they work. Unfortunately some don't work for very long, and all will give problems sooner or later. If you're looking at a used bike, one wouldn't be in my top 10. For used, I'd recommend looking at standard Chinese bikes, especially if you're good at fixing things...

My spider senses tell me that it's going to turn out that you're a Pendix dealer. If so, just be honest, otherwise welcome to the forum. I look forward to your useful contibutions. Hopefully you'll be able to help a lot, as you must have some experience of fixing those bikes. A good start would...

I think one problem is that the wheel size setting only goes down to 20", so it's always going to think that you're going faster than you are. P06 is wheel size. If you set the wheel size to 22" and the units in P02 to mph, the speed displayed will be appoximately right as km/h. That solves one...

Just to clarify the situation, this device is just an input sensor. When you press the lever, it gives out a voltage proportional to how far you press it. The voltage is 1.2v at rest and 3.8v fully pressed. The motor controller converts that voltage into a number. What it does with that number...

Your lead batteries are shagged, which is what always happens to them when they're not used for a while. Lithium is more versatile, but can't provide as much current, so you get a bit of sag under load. A 24v lithium battery charges to 29.4v and goes down to 21.7v when empty, so the average is...

Nice one, Neal. I never thought of 12S. I'm kicking myseld now. There's probably room in the top for two 6S ballance connectors to charge with a lipo charger, so no need for a BMS. The problem is health and fitness going down, so light-weight solutions might be a thing of the past.

You have to pedal to make it active. If it works like other Wispers, effectively is pedal assist power boost that overrides the pedal assist setting to give full power on demand. According to other Wisper owners, you get more power from it than you get with the highest level of pedal assist, so...

My 36 volt battery drives my 250 watt 36 volt hub fine, right down to 31 volts? I thought you said that it wasn't working, which is why you asked for help. Now you're telling us all the answers and not answering our questions.

You might have a compatibility issue between the LCD and the controller. As I said, the Cyclotricity kit has a special software version. Both speed and power are involved in that version. You probably now have the standard controller. Even if your LCD was a standard one, it can only access...