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I came across (I think) something like what you describe with a Himo C20 ebike. The bike is fitted with a 20 inch direct drive motor and must be travelling at least 6 km/hr before the throttle becomes active. The signal comes from the motor hall sensors as the white wire that normally goes to a...

They did say ''only 5 pcs in stock', so perhaps they bring up their price on an item when their stock levels are running low. I think they call this ' dynamic pricing' (or 'differential pricing'?). (e.g Ryanair airline tickets and Oasis concert tickets?) I agree its not popular with some...

I think the newer akm100sx motor has 16 magnets and a gear ratio of 12.6:1, (which gives a p1 value of slightly over 200). This means, at the motors nominal 201rpm, each pair of magnets (pole pair) is flying by the coils at about a rate of 100 X 201 = 20,100 per minute. I think they call this...

I dont know if this is relevant or not but I fitted a front akm100 201rpm lately and it behaved weirdly until I changed the P1 setting which was 88 to 200.

The forks are compressing a little and I presume this would be normal and give some movement. Can the forks me made stiffer or locked out (for comparison to see would this make any difference).

Are the tyres pumped hard?

Try not to do any wheelies if your front wheel is loose. https://www.newsflare.com/video/635076/front-wheel-unexpectedly-falls-off-as-man-showcases-wheelie-skills-in-china#

I have an old but working cyclotricity kit (2017) 36v/14A Kt36ZWSR controller (label hard to read) in my hand at the moment. I have removed the end cover and can clearly see the shunt and the resistor. The shunt is discoloured, so I guess this is normal. The resistor has a red, black and brown...

I think that large carbon resistor is part of the regulated lower voltage and 5volt circuit. One end is connected to the 48/36v and the other end goes to the voltage regulators. Its shown in the bottom of the circuit diagram I have attached below as R62 and 82ohms/3watt but this resistor number...

The picture below helps to explain why 14g at the j bend may be stronger than the thicker 13g. When the spokes are newely fitted, there is a gap at the spoke flange. With the lighter and more flexable 14g spokes, this gap disappears when the spokes are tightened and pre-stressed ( checked and...

Looking at your hub in the spoke calculator you posted above, you have a large dish/offset of 9mm and a spoke tension ratio of 32:68. I would use the lighter 14 gauge rather than the heavier 12 or 13 gauge as there wont be enough tension on the disc side to properly tighten the heavier spokes...

That cheap battery I bought last October seem to behave the same. I think you may have also bought the same. I charged my 48v battery this morning and took the following readings after the charging was complete and the green light was on the charger. The charger is still plugged into the mains...

To answer your question, I have come across two new different batteries with on/off switches with instructions and the instructions in both cases is that the batteries should be switched on when charging. Its not unusual for batteries to settle at an end voltage of say 41.6v. The last BMS I...

I dont know if I really trust that frame design. I think it needs to be well made to make up for having no extra/cross bar.

I changed the chainring by just opening the 5 outer bolts. I then just turned it and it passed outwards over the crank and pedal. Fitting the replacement is just the reverse but you need a long tweezers and its a bit picky to refit the inner allen 'nut' thing. Although its not necessary to...

It would be great if both bikes had similar type batteries that are interchangable. This would be great for long runs or allow you to instantly choose either bike when only one battery is charged etc.

Be sure to check the freewheel/freehub for looseness/bearings as this a common problem. e.g. https://www.pedelecs.co.uk/forum/threads/knocking-noise-from-the-motor-freehub-after-1500km.41855/

Are you thinking about 'Jaywalking' laws? But beware, pedestrians may be children or have mental,visual or hearing impairments etc. so you always have to take care. https://en.wikipedia.org/wiki/Jaywalking

I just wiped the section of the motor down with a dry rag and stuck them on. I found it hard to get them square when fitting thru the spokes. No problems so far. (excuse the photo quality)

The bike involved in the Irish accident was reported as an ENGWE EP-2 Pro Folding e-bike. (750W ?)