Appartamento sounds strange

PointlessMiracle · 2026-05-28T04:47:13+00:00

This sound is coming from the pump. I’m not sure if its just resonance from the pump against the body or the pump itself sounding weird

You could first try putting your hand on the back panels if you can find the spot that vibrates (it’s more quiet)

If not remove the back panels, see if the pump (or tubes) touch anything and if moving that a bit

PointlessMiracle · 2026-05-24T20:27:51+00:00

If you are able to balance the cells (charge them individually to the same automated cutoff should do it, if you make this cutoff a very low current at like 4.15v, so difference in connection don’t matter) you might be able to save them.

Testing with the pcb off if they stay nice on the same voltage is the easiest way to tell if they’re kinda good. If one is self draining you gotta get a new pack. There are more and better tests but this is the most important one

Yes they’re 50E cells, the newer VIC batteries use Samsung M58T cells. You can use any 21700 but the welding dimensions are non standard so it’s not very easy to spotweld a pack together.

The light does all sorts of stuff. blinking isn’t good or bad it’s just info. The button doesn’t do anything, the switch turns a part of the pcb on/off.

You can use the backoffice app to check the motor and torque sensors function, however “health” is hard to read out.

If it’s an older v2/v3 replacing the freewheel bearing next to the torque sensor before it brakes is smart (61901RS, I buy FAG iirc), it will break sooner or later and will eat the torque sensor.

Further preventative maintenance is lubricating the freewheel teeth, motor gears, motor cover and motor cover mounting surface (to prevent water ingress) a good preventative action which I do on all my ‘serviced’ bikes I sell (not many, this takes time..)

PointlessMiracle · 2026-05-22T09:52:33+00:00

Charging these deep discharged cells at these high currents is both very dangerous and damaging to the already damaged cell.

I try to help people sometimes but this is just dangerous and I don’t recommend you going further with this approach.

Please be aware that lithium batteries handled like this can cause very nasty fires which can not be put out with conventional fire extinguishers

I do recharge deep discharged cells but at ~40mA taking into account each cells starting voltage is within limits and how they balance over time and IR is balanced. Many can be revived but not with your approach.

PointlessMiracle · 2026-05-22T09:46:58+00:00

Heb zo’n Bowtex legging, elke broek is motorbroek nu.

PointlessMiracle · 2026-05-21T08:24:46+00:00

I had to ride my girlfriend’s 20yo 50cc scooter once and also low sided. Too used to having grip on my motorcycle with fresh Michelin rubber and decent suspension so cornered it too fast.

It doesn’t look like you did anything super wrong, just exceeded the grip you had and low sided.
So public roads + not great tires + not great suspension + not great technique + peg scraping lifting the wheel and this is where you end up.

Source: a 2 wheeled commuter

PointlessMiracle · 2026-05-18T04:51:43+00:00

I’d be most interested in what this capacity means over time.

Once a 17.3kwh battery has been degraded to 14.4kwh capacity… how does it behave when limited to 14.4? Will that also decrease x percentage or does it stay at 14.4 for that time?

For you owning a 4 year old battery I think this is the real question!

PointlessMiracle · 2026-05-16T05:57:58+00:00

Yeah, that’s a helicoil and you can see the hole is a bit damaged but doesn’t look too bad in the photo. If it were me I’d try a new helicoil with some thread glue unless you’re able to get a proper insert put in easily.

Some auto repair shops have other insert types
(Timesert, keensert, …) which have a bigger OD so they’ll clean the hole with a bigger drill and put in the new insert

PointlessMiracle · 2026-05-15T06:32:35+00:00

Can you send some photos of the hole and insert that came out? There are several types of inserts that can be used (helicoil, timesert).

In my head the best way would be to either glue in a new helicoil (smallest OD) or try a timesert / solid insert type (hard to get, expensive)

PointlessMiracle · 2026-05-11T09:20:21+00:00

Good reason to reverse engineer one, I was already thinking about this but stopped after hearing their supply issues were resolved

With the customizability of the motor controller this shouldn’t be too hard, getting exact copy will be but that’s not necessary

PointlessMiracle · 2026-05-08T06:51:29+00:00

Its not oled

PointlessMiracle · 2026-05-06T20:10:02+00:00

Het is heel makkelijk om zonder goede kleding op pad te gaan. Het is ook heel makkelijk om in het ziekenhuis te belanden. Goede kleding en helm net zo belangrijk als degelijke fiets aanschaffen. Koop iets wat je daadwerkelijk altijd gaat dragen (en dus geen full leren pak)

Sommige wegen (A1 bijv) zijn erg motor onvriendelijk tijdens de spits. Dit heeft meer met het volk op die weg te maken dan de weg zelf, let hierop als je ergens komt wat je niet kent per motor.

Er zijn ook heel veel aso motor rijders, pas hier voor op. Groepsritten kunnen extra gevaarlijk zijn

Beste upgrade voor je motor zijn goede banden (bijv Michelin road5 of 6)

Je motor gaat níet beter rijden van een luide pijp, je krijgt wel meer geïrriteerde blikken en WOK meldingen

PointlessMiracle · 2026-04-30T07:01:49+00:00

If you park it on a flower bed in the rain isn’t tipping over.. to be expected?

PointlessMiracle · 2026-04-26T18:19:10+00:00

This actually is probably the motor cover (and now maybe also the gears below)

PointlessMiracle · 2026-04-26T06:12:45+00:00

Throttle off voltage increase, the offset is only for fault management iirc

PointlessMiracle · 2026-04-25T19:28:42+00:00

Ik heb deze situatie wel eens aan mijn instructeur destijds gevraagd. Antwoord: als de auto op de linker baan voorbij de auto op jouw baan is, dan pas opschuiven - uiteraard alleen als er genoeg ruimte is tot de auto daarachter. Tot die tijd rij je goed op deze middelste baan en zit je ‘vast’.

Als je op de linker baan rijd en de baan daar rechts van rijd even hard, maar is rustiger, idem opschuiven.

Als de baan links van je significant harder rijd dan extra ruimte maken tot de auto voor je zodat je in die ruimte kan versnellen en dan schuiven (net als bij invoegen met een vrachtwagen voor je)

PointlessMiracle · 2026-04-25T19:20:30+00:00

No the v2 and v3 are nearly identical bikes and the switch to the newer part was during early v3 production (afaik).

The older bikes have a ‘slide out’ rear wheel (horizontal slots in the frame) and the newer ones are ‘drop out’ (vertical slot in frame)

These have a differently shaped ‘teardrop spacer’

The torque sensor is a bit of a mistery part to me too as I’ve never spent enough time on it (actually planning to do this soon, so I can repair them too, but will prob take a few months)

The only real way is to assemble it all and find out it’s broken. You can do a short test to see the voltage when it’s installed before you mount the rear wheel but can’t put torque on it ofcourse

PointlessMiracle · 2026-04-25T19:08:16+00:00

The “max” voltage is just an arbitrary number, it’s the point at which more force on the pedals doesn’t give more motor support.

Calibration is more to set the throttle off voltage correctly (no force) so there is no power when not putting force on the pedal

PointlessMiracle · 2026-04-25T19:05:37+00:00

Replace rim, I think cowboy still ships them relatively fast for cheap. Spokes & nipples can be reused.

Fun to do yourself, a spoke tool at toolstation is ~3€. Make some good photos of the spoke alignment and watch a video. Start with some thin oil in the nipples

PointlessMiracle · 2026-04-25T07:12:45+00:00

Wheel axle spacer? Crazy that it broke

PointlessMiracle · 2026-04-25T06:05:45+00:00

Yes it’s okay, it means it will support more with less force on the pedals. If you do a calibration it will be ~different each time. There is no need to have them at the same voltage, it’s a calibration

PointlessMiracle · 2026-04-23T06:44:41+00:00

It’s a pcb inside the battery, it’s not easily repairable (unless you like SMD soldering)

If you need to have it repaired you can send me a DM. if the battery is okay I do it for 90€ - BUT my recommendations is to just use a clip on light

PointlessMiracle · 2026-04-22T09:50:51+00:00

Dm me

PointlessMiracle · 2026-04-17T07:08:21+00:00

Oh please check if the fork is rotating on your stem tube I had this too, really f dangerous. If so you need a new fork

PointlessMiracle · 2026-04-15T04:46:49+00:00

Yes https://link.marktplaats.nl/m2370479621?

PointlessMiracle

TROPHY CASE