Dear Sir or Madam,
I have converted two bicycles using your system: an old, relatively large Trek fitness bike and a very small, older Focus sports bike. Since the bikes were so different, I was able to thoroughly test the system and also compare two separate shipments.

In the first shipment, the wheel was not properly trued and had significant lateral runout, so I had to adjust it myself. That was annoying, though fortunately I was able to do the work myself and avoid a return. In the second shipment, the wheel was perfectly true.
The first shipment was missing the second rubber protective cap for the rear wheel's left-side bolt, whereas the second shipment included it. It would be great if you could send that missing cap to me in a small envelope.
On the other hand, the small rubber cover for the charging port at the bottom of the battery was torn off in the second shipment; that part had been fine in the first shipment. It is not a major issue, but these are minor quality defects that really shouldn't be there.

Overall, the goods in both shipments were packed very well and securely, and the delivery process went very smoothly.

With the large Trek bike, I had to mount the battery at the bottom of the seat tube; this made the cable run to the handlebars very tight, forcing me to mount the display centrally on a small stem. An option for an extension via an adapter piece would be ideal.
Also, the display mount could be designed with adapter rings to fit both smaller (22mm) and larger handlebar diameters—useful if one wants to mount it centrally or is forced to mount it there due to the placement of brake and gear levers.
I also missed having rim tape to protect the inner tube on the rear wheel. While not strictly necessary, it is highly recommended. Those are my suggestions for improvement.
The overall riding experience is excellent. Responsiveness is immediate, torque is sufficient, and the transition as you move beyond the 25 km/h assist limit is very smooth and well-modulated. It is all very well executed.
On flat terrain, the battery capacity easily lasted for over 50 km; so, despite the small battery—which is, of course, a great fit for sporty bikes—there is no cause for complaint here either.

It remains to be seen how the system holds up over the long term.
The price isn't low, but it is fair; however, it shouldn't go any higher if it is to remain an attractive overall proposition once you factor in the necessary installation and the prep work for what is usually an older bike.
In my view, you should budget a few hours—or even longer—for installation, as things rarely fit exactly as they theoretically should, especially with older bikes. That said, the Yose components themselves fit together perfectly.

My verdict: Despite minor flaws, I’m giving it 5 stars. Yose offers a great system at a reasonable price and has done a fine job. I hope it proves reliable over the long haul.

Ich habe ca 20 Fahrräder mit einem Umbauatz von Yosepower gebaut. Das älteste hat schon über 11000 km gefahren und hält immernoch. SUPER

Worth every penny 👍🏻

Funciona perfecto,muy fácil de instalar...una maravilla.

Best low budget option for powering your 36V eBike motor. Fits for Front Motor, Real Motor or Mid-Drive.
Ready to use with BMS and XT60 connector. The Batterie Charger is doing his job as good as any OEM eBike Charger and has light weight. I am using two of them together with YOSE Power Dual Batterie Balancer for a 250W Front Motor Kit. Each of them are mount at the back frame inside motor cycle leather bags together with there charger. Excellent price value and weight Balance!

I am using that kit on a Puch Clubman steel frame bike from 1970. Two 10,4Ah softpack Li-on batteries from Yose Power on the back with dual akku balancer as well as a pedal Sensor for vintage bike. Everything directly delivered from Yose Power, so it was plug and play!. My bike has a Sachs Pentasport 5 Speed hub gear at the rear wheel and I am using the Weinmann Stock Brake with Cool Stop Continental Salmon brake pads. Nö problem with that kit. It works up to 36km/h at 42V and still can run 30km/h at 36V. My bike (steel frame) has now 26,4kg with both batteries and chargers. I am using a single wheel Trailer for my dog (up to 40kg Trailer weight) and my personal weicht is 77,6kg. On Level 5 with everage Profil, I can go for a little more than 60km.
I am more than satisfied and would buy it again every time!

Estoy encantado con el kit de conversión...para las rutas que hago me sobra y los desniveles positivos ya no son un problema para mis piernas de 55 años.

I can only recommend it to everyone! The heavy, slow bike has been transformed into a lightning-fast, easy-to-drive bike.

Eccellente kit di trasformazione in ebike di una normale bici muscolare, utilizzabile a fini di spostamento urbano ma anche per gite fuori porta ed in montagna. Per gite impegnative con importanti dislivelli è fortemente consigliata la batteria di scorta.

Great kit I have 1000km and it has no problems. It is also legal which is great

Je suis très heureux d'avoir installé le kit yose 350 w moteur arrière pour roue libre 700 c ! Il est très facile installer et ca fonctionne a merveille ! Il est destiné a ma femme qui est tres heureuse du résultat !
Merci a yose pour l'envoi rapide ! Je recommande vivement

Works as specified.

Bonjour,
Je suis très satisfait du fonctionnement de l'écran ! Est-il possible d'avoir un mode d'emploi détaillé ? J'ai un kit 350 watts roue arrière

Facile à monter et très efficace.

Ich habe mein uraltes Mountainbike mit dem Kit umgebaut, leider hat das Vorderrad nicht in die Gabel gepasst, da hätte ich mir gewünscht, dass die Beschreibung besser gewesen wäre, es reicht nicht, dass die Gabel unten breit genug ist, die Nabe ist relativ hoch, ich habe meine Gabel daher mit der Flex bearbeiten und umschweißen. Die Flaschenhalterung für den dicken Akku ist ein Witz, die zwei Gewinde im Rahmen haben zwar gepasst, aber ich konnte den Akku wegen der Rahmengeometrie nicht befestigen, die Halteplatte auf Plastik ist bei einem so schweren Akku ohnehin ein Witz, ich habe daher eine Metallplatte passend gemacht und mit Schlauchschellen am Rahmen befestigt, das ist zwar nicht schön, aber es hält, ansonsten funktioniert das Kit einwandfrei, beim Fahren im holprigen Gelände dreht das Vorderrad aber manchmal durch, das ist aber kein Problem. Man sollte auch vorher darauf achten, welches Tretlager man verbaut hat, für alte Tretlager wie bei meinem Rad muss ein anderer Senso verbaut werden, was wieder 25 Euro zusätzlich kostet, insgesamt könnte Yose die Einbauanleitung deutlich verbessern, wie die Radgröße eingestellt wird, steht nirgends.