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Alas no But in the context of approaching the company direct for a 1 off spare part, it’s possible

It’d be cheaper still to just replace the motor core, if indeed that option is available

More likely derailler tension. Adjust the ‘b’ screw to minimise the gap between top derailler pulley and the driven gear cluster. Use trial & error to find the closest workable gap

Gear sensor shouldn’t be needed on a bbs01 A clunking gear change with a BBS01 is a poor derailler setup. A gear sensor is the wrong sticking plaster.

On two separate occasions I’ve informed the police when one of my stolen bikes popped up on gumtree / ebay / fb. On both occasions the police weren’t interested - “sorry no resource available” was their response. If you can purchase the stolen bike back through PayPal, I think you'd have a...

I’m honoured to stand aside and let you have first refusal on this vfr I reckon a hailong case will fit on that downtube

Thoughts please on this bike as a potential bargain for a hub drive conversion (bbs02 or similar): https://www.ebay.co.uk/itm/264813859646 I’ve no connection to the seller!

Given the bbs01 torque output, a gear sensor isn’t really needed for a well set up derailleur Have you checked the derailler tension, and indexed the gears correctly?

If you’ve warranty, definitely go that route - you’ve ruled out throttle & brakes so this Issue is not an easy fix

It may be you may be able to tune out the problem via a programming cable. Even if you’re successful, it’ll not be long before the controller misbehaves in some other way. I replaced the inbuilt controller with an external kunteng controller ages ago - these kind of problems instantly solved

Is the problem still present with brake & throttle disconnected?

I’ve foolishly removed the 3 stepped planet gears from a Q128 WITHOUT first marking up their respective angular position. By trial & error I’ve managed to get the gears to mesh together, but the motor is noisy and underpowered. Is anyone aware of a procedure to reinstate the correct gear...

Question; Does anyone know of a controller that would allow programming of a custom curve of torque sensor vs motor current?

Following my £1500 ebike theft payout under home & contents policy last year, Lv= have increased my premium from £220 per year to £305. Pretty reasonable I think.

I thought this concern is only valid if there’s a suspicion phase / hall wires are crossed?

I’ve 5 of these controllers, been running them for a couple of years now, both 6 and 9 mosfet versions (all 36v) the noise & vibration issues suggest P1 setting. I set P1 at 202 for my q128c’s. You can experiment with multiples of 88 I think. Do your troubleshooting with the PAS unplugged, Ive...

Can you post your P and C settings?

To eliminate any harness problems, insert paper clip as photo. PAS should work

Do you have a spare throttle on hand to help with troubleshooting? If not, get one your controller is at risk if used with a dead / dying throttle

Keep your busted controller as a side cover - it’s good for waterproofing if nothing else. You get the chance to hollow out the guts of the controller too, which is a cathartic experience External controller placement is a problem - I use a hailong downtube battery that allows a controller to...