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Here's an example of a not so good install. This ebike axle is 12x10 mm, and the normal bike dropout slot is cut for a 10mm axle, meaning the motor sits a little high. What a lot of people do is file the slot and the derailleur guide about 1 mm deeper, so the axle nuts will fit over the old...

Sure would like to see a picture. They won't post if they are too large. You have to shrink them, Usually, the axle is pretty snug in the dropout. It might rock a little, but you shouldn't see any spacing between the axle's faces and the dropout, Certainly shouldn't see it turn much at all. I...

Looking at your first picture, it cracked right where the tube met the steerer column, and 1/4" from the cutout. Ah well, you probably should get a new bike out of this from the mukkpetters , but do you want to ride it? Can you give us a picture looking down on the tube? It must be wider than...

Maybe you wired it wrong? You showed a picture of four cut wires. Why not show us what you did to it? https://forums.electricbikereview.com/threads/bird-36volt-12-8ah-500watt-a-frame-e-bike-wiring.57629/#post-679310

That's your Mukkpet Ninjer? I see a ridiculously huge cutout on the left side of the downtube. Probably generated a stress fracture if the picture is accurate. The frame tubes also look like the skinny and stylish tubes seen in a steel fream to me. Yet this is alloy?

I put one on my Huffy Oslo, a few years ago in 2021. Works for that bike. Depending on your brake lever mount, it may or may not fit as close as you need to the grips. I also bought a right hand model for another bike that didn't work because I also wanted to retain a twist shifter, I bleieve...

It depends on your controller's throttle threshold. I'm speaking to the max voltage. Mine will not respond if 5Volts is applied to the throttle input, but some guys say their units will. I suggest grounding the zener and put the switch between the diode-resistor junction and the throttle...

I am in Illinois, which had the same 3 class definitions lifted from California statutes 8 years ago, I could not see how they allowed class three bikes to have throttles, but we had a bricks and mortar ebike dealer and also a forum member in my town, who insisted they did. He got banned. I...

Performance in a city usually isn't a big thing. How you will store it and keep it from getting stolen matters. Are you talking about an electric or regular bike?

I use an Atorch DL24P to load test my batteries, It can put a 3 amp load on a 48V battery and measure the watt hours or AH that the battery can produce down to its low voltage cutoff, It's very reproducible. Testing at low currents is closer to how the cells are rated by the manufacturers so I...

With over 60 years if hopping on from the leff side, that;s a good way to get killed, I think,

I was looking at the local suburban news. A garbage hauler saw his load on fire and the protocol is to find a clear spot, dump it on the road, and the fire department puts it out. Saves an expensive truck. They mention it had happened at another town a week earlier, and still another fire a...

Your first ebike used a 36V battery, so let's start with that, A 36 volt battery is made up of ten cell groups in series, Each group can consist of 1 or more cells in parallel. Lithium cells have a max charge of 4.20 volt, and battery makers agree to keep the minimum charge at 3.0V. Their...

Are you sure the speedometer is off or is it that you have a different top speed because you have a different gear size for the smallest one? Simplest and most accurate way to get speed is to get the wheel rpm from a speed sensor and convert that to speed, knowing the wheel diameter...

That is a common battery mount, but there are many cradle sizes like that, You might look at this reference and see if you recognize your battery case. https://ecoteardown.top/hailong-ebike-battery-a-comprehensive-guide/

Ten years ago. I bought my first ebike kit (also bought a complete commercially made ebike). The assembly manual for the former had a link to the motor maker's website, which proudly showed rows of women tediously hand wiring motor cores. Truly a sweat shop. Since then, chinese engineers have...

There must be some fault in the battery circuitry that drained both sides equally to 12V. I am surprised that the battery let you recharge too. An ebike BMS wouldn't let you even measure the cells if it was below 30V, My thoughts are if you let the battery sit for 4-6 weeks to see if they hold...

Good for you! Hope it runs as well as those reviewer say it does,

If you remove the controller, per this facebook post, you can expose the controller and the entire wiring harness. From there, you can confirm that the red/black wires go to the controller abnd are nattery plus/minus. The identity of the other four wires will have to be inferred fro, where...

There is an on/off switch on the right side of the battery, Hard to miss, but maybe you missed it, You got the battery seated so it can lock? Pedaluma is talking about a round connector on the display cable. Follow the cable out of the display and it should have a connector like the green one...