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  1. D

    My 48v pack show 55.2v fully charged on SW900, should I worry?

    Hi lads, I just finished my 2nd charge after dropping to 45.5v the pack, cause tomorrow I plan a large ride, and now the LCD SW900 shows a charge of 55.2v. Suposetly the charging should stop at 54.6. I remember the first time I charge them right away with multiple re-plugging to allow BMS to...
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    My new e-bike with 3d printed shit.

    This is my new e-bike, I have done 2 before, one with a 3000w lunacycle mid drive that was stolen from my garage, a 1000w geared rear hub one that got the wheel runing faster than the bike itself just before I hit the ground and have to bring the mess back home 10km on foot (aah... the good...
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    Delivered Amp configuration on SW900

    Hi lads, I just made an e-bike with: Hailong batteries (not specified the cells brand, probably generic) 48V 24AH 13 Series, 5 Paralel, 13S5P Cells: 21700 3,7 V 4800mAh BMS: 40AMP continuous 100 ± 10AMP max And: CSC 15 mosfet controller Fit for: 48V 1500W motor wheel ，SW900 Display Rated...
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    Efficient V-brake pads por heavy hub motor?

    I installed a 1500w rear hub, and my V-brake can't even block the wheel in low speeds no matter how strong I press. I don't like disc brakes, I know they are far better, but they are more prone to failure and requires maintenance, change the oil every year etc... I have them and I hate them...
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    1000w or 1500w? Power/range differences

    Hi pipol. I want to make a e-bike, I live in very forest/hills terrain, so I wanted a bafang or something mid drive to play with the gear ratio, but sadly I can't install that type of kits in my bike due to weird shape of the frame, so I'm limited to a rear hub. I then search for a geared rear...
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    Modify the R8 platform

    Hi lads, I purchased this thing in 60v 23ah single drive: https://es.aliexpress.com/item/4001054970042.html?spm=a2g0s.12269583.0.0.33355c39QvbY0c Never heard of it, but I liked the shape and the lightwheigt (only 24kg claimed) and the fact it doesn't look too suspicious, cause in my country...
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    Choise between Scooter 60v, one or dual motor?

    I have an eye on a china e-scooter and I have to decide between a 60v 23ha two motors 2400w, rated at 75km/h = 46mph, or the same model, 60v 20ah with one motor at 1200w rated at 55/60km/h = 34mph/37mph. The price difference is significant... and the dual motor model does NOT have a eco mode...
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    How to dissasemble a Mxus rear hub?

    https://www.alibaba.com/product-detail/2019-MXUS-48V-1000W-powerful-ebike_60835187546.html?spm=a2700.7724857.normalList.22.9d5b6d1f6QuUsJ I Put that on an alluminium bike and I break the rear fork on an uphill, motor spins out and mess the cable. I managed to unscrew the impossible screws, I...
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    I break the rear fork...

    New E-bike assembled, all unrefined, but operative, first test, drive 10 km to a nearby location, everything nice... ho look! a medieval bridge with absurd elevation and bumps, lets test the climbing power... brrrrr!! Pum!.... ho shit... The rear wheel jump out, motor stop working and LCD...
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    ¿How do I put the cassette on a rear hub without the freewheel?

    Months ago I ordered this kit: https://es.aliexpress.com/item/4000838391101.html?spm=a2g0s.9042311.0.0.27424c4dVcSU1m Today it is finally in my home, and I notice something... it lacks the freewheel piece where the cassette disc usually goes... I try to searh for the piece or if its...
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    Making new E-Bike, question about power

    Hi there, long time no see. ¡My E-bike was stolen! The thiefs break down on the building parking and stole it, also break car windows to stole the cd-player and GPS... we are deeply thankfull fot this cultural enrichment, has I'm myself are pesky little white european and I must pay the toll...
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    Battery failing! Danger?

    Hi, I got a 1 year old battery, very well cared, last time I charge it at 80% as usual, put in the bike, grease the chain and ride a few minutes at the garage, everithing seems ok... but in the morning when I ride the bike to work, the thumb indicator shows a dramatic drop off, the motor starts...
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    Cyclone freewheel replacement, what are the correct measurements?

    Hi, my cyclone 3000w freewheel start to make crank noises and catch the axis rotation when it wants to, something inside is just wasted. Even when the piece itself is not expensive, the shipping costs are ridiculous, also I've been nearly scammed by a shop that never send the piece (I open a...
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    Cyclone 3000w problem! need disassembly of specific part

    Hi, my cyclone 3000w mid drive start making crack sounds and its also notorious sometimes when pedal the bike. I dissasemble it and check internal gears for any obstuction, all is in place and they rotate whitout problems, it appears that the cause is in the external silver cogwhell that pulls...
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    ''Disarm'' a mobile phone

    Hi, I have some old mobile phones that I never want to use again, but I find appealing the idea of turning them into small game consoles for flash, mobile games or emulators. Even if I remove the Sim card and the internal anthena (that small chip) is the phone still emiting radiation of some...
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    Safe cage, Really that important?

    I got a litium 52v 24ha pack made out of genuine panasonic GA cells, trusted vendor, whit BMS and smart charger, and I charge the thing in the house inside my room. Everyone says that a battery pack can turn into a big toxic fireball and burn you, your house, your family, your dog and your...
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    Speed/Watts test, more speed = MUCH more watts

    I make recently a 3000w motor E-bike, whit 3 electric power adjustments, according to reads, 1rst caps the motor to 900w, 2nd 1200w or so, and 3rd goes full, burst 3400w for one second or two and stabilizes around 2400w as time pass. Well... lets test that babe, plain track, no pedestrians, all...
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    Question about % and charging

    I plan to squeeze has many charge cycles as possible of my lunacycle 52v-24ah pack. I hear that the golden rule is not to charge above 80% unless you plan a long ride or want to balance the pack, and not let them drop below 20%. So here's the question, the readings show around 50.1v, Battery...
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    First E-Bike, finished! (whit photo)

    My E-bike is already opreative and almost finished! Its my first and I know it could been better and there is still work to do. 3 electric shift to regulate power (according to lectures, 1rst put 900w, 2nd 1200w, and 3rd 3000w) and 9 mechanic gear. First test.. frock, the front whell elevates...
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    PAS and Throttle togheter?

    Hello, I'm a Spanish wannabe DIY who just ordered a cyclone 3000w kit to make something out of it. I'm very excited about the e-bike world, this is gonna be my firts attempt and either I succeed and become the coolest kid in the street, or fail and burn my house. Saddly, in Spain the...
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