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On the '790' unit, the hi and low lights flashing is a 'brake level' fault and most likely is due to switches on brake levers sticking or brake lever not fully returning to normal position. You can disconnect these to see which is faulty and bike will work. But check first that you put back the...

Take off the front wheel and try again. This worked for me once. The front axle was splaying the forks slightly outwards and I had to readjust washers.

Hi. I fitted a 250w yose lately and noticed that lcd3 is slightly different (e.g L parameters) than older yose350. I am inclined to suspect that settings are possibly changed to make controller compatible with LCD5. (In LCD5, setting C5=02 affects the 'soft start'). Anyhow, I would try C5=07 or...

Re the above, I think there is a need to distinguish between battery current and motor (phase ) current. I agree that torque is proportional to motor or phase current. But the controller may only limit the battery current. At low rpm, the battery current is limited but the phase current...

I wonder should you clean up the outer gears (with a wooden toothpick) in case there is bit of the broken off nylon gears stuck in the grooves. Also check inner steel gear? Also I think there is a recommendation not to use petroleum based grease as some claim it will soften the nylon. I bought a...

I think 'Ba' also translates ( from Chinese to English) to the number 8. I think 8fun is a rough translation of Bafang or a play on pronounciation (8fang......8fun). One on-line dictionary translates Ba Fang to 'the eight points of the compass'/ all directions...

I am inclined to see the BMS as an additional item of safety but not as replacement for bad battery design. Anyhow, if it was me, I would consider using replacement mj1 possibly with solder tags which would probably cost you about £25 delivered...

The problem is that if you discharge the battery fully, you will reverse volt the 30q as they have smaller capacity and then, possibly??

A common problem I have seen (especially when my children were younger) was when a bike was carelessly allowed to fall over onto the derailleur, the hanger would bend inwards, and in some cases I have seen the derailleur getting caught in spokes when the lowest gear was selected. I remember...

I have never seen spokes break in the middle so as long as you keep away from the threaded area and j bend, I think its safe to put bend in spoke. After fitting spoke, overtighten a little to stretch out kinks and then back off to get wheel straight. Sometimes (on wider tyres) its possible to...

I have often replaced a broken spoke (at J bend) in 15 minutes. I simply remove old spoke, leaving old nipple in position and thread in new spoke. No need to take off wheel or tyre. I usaully have to put bends in new spoke but it straightens out under tension. The only thing I have to be careful...

Hi. I had a 700/28inch 250w cyclotricity (from ebike direct) unrestricted, supplied with no display, just throttle only. It is a fast hub, 33km/hr wheel of the ground, useful power up to 28km/hr with full 36v battery. However, its not great on hills or against wind when compared to other...

PS. The freewheel version needs some type of washer (preferably the thrust washer)at shoulder as shown below or axle could push through alloy dropout. (imo)

Hi. My rear dropout was (old?) 130mm when I fitted a rear freewheel type 350w with six speed freewheel and the thrust washer on the outside. However, I did fashion an m10 washer into an oval m12 X 10 with round file and put on the inside between the axle shoulder and the alloy dropout. The...

The mosfet often contain 'body diodes' which often work act as flyback diodes and allow reverse currents (even when mosfet is turned off) and you can get a bridge rectifer effect. But the voltage would not normally exceed the battery voltage ( and hence no current would flow in this case) until...

PS you cant use this simple diode arrangement with any type of regenerative braking.

The diodes act as one way valves and prevent flow of (parasitic?) current between one battery to another . Batteries heat in large part due to internal resistance and this heat is proportional to the square of the current. Two similar batteries in parallel can potentially reduce the heat in each...

I have used a 40 amp dual Schottky Diode (20 + 20 amp) mounted on aluminium (approx 2 x 1 inch) and put in small plastic box for the last year and it seems to work well. It means that the batteries are isolated from each other which is useful in my case as one battery charges to 42 volt while...

The motor simulator is very good. For the purposes of comparison, I have compared a 95 kg 'not as fit' cyclist (50w legs)with a 75 kg fit cyclist (200w legs), both with bikes weighing 25kg and facing a 8% hill. The lighter fit cyclist will ascend at 20.4 kph (12.8 mph) and the not so fit...

The woosh website gives useful charts that (in my view) gives a good indication of what performance to expect where the rider is not able to contribute much power. Now taking into account that you can sometimes be facing a headwind as well as an over 8% climb, and you do not want to be climbing...