David Groen

I'll double-check, then play around with P1.

36v sine wave with Hall sensors working correctly. (I bought a tester gizmo for about a tenner). I set P1 to 24 as the motor has 24 magnets direct drive. I probably tried different settings in the past with no effect, but I'll have another go. Many of the settings actually have no effect, even though the manual and youtube videos state that they should. I thought there was perhaps a slight incompatibility between a generic controller and non- generic motor. Also, as a direct drive, the motor is actually running slower than a geared one, and it does smooth out with speed. Does the controller work more smoothly at high motor speeds, perhaps? If I could solve this, the set up would be as good as the original more complicated set-up, with expensive torque sensor and chain tensioners.

Haha, sorry, attaching photos isn't very intuitive.

Thanks, I agree. The Sparta has Hall sensors, so I found the KT fine.

I'll send some photos later. The KT PAS works with a KT controller, others don't. You can program it as LH or RH, 6 or 12 magnets etc. I used a PAS to keep it street legal, the throttle just boosts it to level 5 if you are pedalling. All this is fairly easily programmable with a bit of trial and error. https://www.youtube.com/watch?v=B0F6x8V0NZQ:1344

I used a KT sine wave controller (about £35), KT PAS sensor (£10) throttle (£10), lights (£20)a generic battery with rack (£300), one that I trusted from a local supplier, with Samsung cells. The KT parts all communicate with each other, and I used the original front wheel after stripping the motor to replace a £10 bearing. I found all this stuff online. A plastic box for the controller which fits on the down tube, plus molex and other connectors and molex crimping tool. Long fiddly job. I then spent some time trying different variables with the programmer. It now runs well and reliably and is future proof and repairable. Not quite as smooth as it was originally, particularly on low speed and high power setting, but I've done 1500 miles on it and it's a comfortable, well-built bike. A long project but satisfying in the end. I can attach photos if you want.

Yes, this was the reason I couldn't use the Sparta battery in my Ion rebuild, not recognised.. My friend who is a qualified electronics engineer couldn't find any way of safely getting power out of the Sparta battery. So, I replaced the controller, display, battery and pedal sensor with generic cheap parts, using the original front wheel motor, and now successfully use the bike. It took a lot of programming but was ultimately a useful bike which I can use and cheaply repair. Let me know if you want to know how I did it, and what parts I used.

I have successfully converted my Sparta RX to run on generic components using the original front wheel motor. I have a Brainwave controller which does everything I need, but is rough under about 5mph. Many posts recommend KT sine wave controllers and LCD display which are slightly more expensive, but that's not a problem. The one I'm looking at is dual mode, but I can't find any info on whether this is square or sine, or if it will cure my low speed lumpiness. I'm using Hall sensors, I'm a gentle 250w commuter in flat Worthing so I don't need raw power or high speed. Any thoughts before I shell out? https://www.ebay.co.uk/itm/154431687750?mkevt=1&mkpid=0&emsid=e11051.m43.l1465&mkcid=7&ch=osgood&euid=88b2e15412f44ebbad54fd4213f463bf&bu=43114199580&osub=-1%7E1&crd=20240410201323&segname=11051

Hello, I have the S866 LCD and similar controller. I also had problems with the PAS and eventually bought 3, of which only one worked. I tested them all on a scope in situ, and they all gave a square wave. The only difference with the working one was that the width of the square wave was wider. This would perhaps tie in with the suggestion to remove some magnets. I fitted a (£9) throttle as a backup and to make testing easier. My bike is a Sparta ION RX+. It has Hall sensors and with these I have found that altering P12 and P13 have no effect with the running of the bike. I got rid of 07 error by setting P21 to 0000 rather than 00001. This makes the display read 'time elapsed' which hides the 07 error. Not sure if it goes away. Only problem now is vibrating noisy motor pulling away, which smooths out after about 5mph. Looking into different types of Hall sensors. I have more notes on the P settings if anyone is interested.

I have now successfully converted my Sparta to use a generic Chinese controller and LCD display ( approx £35), PAS (£8), throttle (£8)and the original motor, which didn't need any modification. The only thing I couldn't use was the original battery, shame as it was a big one with loads of power left. Bike works well, but slight lumpiness as it it picks up speed which clears at about 5mph. Apart from that , I now have a Sparta ion that I can cheaply repair myself. And a spare front wheel with motor, but that's another story.

hooi! i have found the same problem, the closed one is neater but doesn't work. It seems to be related to the width of the square wave, rather than the height (=voltage). This website below explains it , but doesn't help decide which PAS to use, so I had to buy 3, of which only one worked. All have 12 magnets. The throttle does work. I have found the motor rough at low speeds, and connecting or disconnecting the Hall sensors makes no difference. I had the bike from new, and it was originally very smooth, but getting parts for it was expensive and difficult, plus it needed software plugins which are not available, so I bought cheap generic parts like you. https://ebikes.ca/learn/pedal-assist.html Bedankt, David

Hello, I'm in West Sussex and have a Sparta Ion (!) and a Batavus Dutch ebike. I get them serviced at Dutch Bike Shop in Littlehampton; highly recommended. Has anyone successfully converted a Sparta Ion to use generic parts to avoid the software issues, (and not being able to easily buy parts from the EU). Thanks!

There is only one dealer left in the UK, Dutch Bike Shop in Littlehampton, West Sussex. Paul and Brian who own it are really helpful, have the software and can get parts from the Netherlands. They used to sell Dutch bikes until......well, you know the rest. I bought two Batavus bikes from them, and they also look after my Sparta Ion. Near the station, or you can post your bike, as some customers have been doing. Highly recommended.