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25 mile muddy, hilly, rocky ride ride in the Peak District today and no power cut-outs. 1. Cleaned all the contact points thoroughly (again) 2. Judicious amount of dielectric grease behind the prongs that connect into the battery 3. Tightened up the battery in the bike I can't believe the issue...

I assume the tiny screws take the back off the controller/display. No mention of any battery in the tech specs and the display only works when connected to the main battery. Why would it need another battery? I'll stick with the dielectric grease approach. Also I rode the bike for 40 minutes...

Thanks again. Whilst I am no expert I don't think they are right. I have attached a photo of the back of the Controller, called Display A by Yamaha and also and extract from the tech manual. As far as I can tell there is no battery. Perhaps you have experience of different controllers/displays...

Thanks for your post. I borrowed a battery from a friend whose Haibike is working fine and the same power loss happened. So I don't think it's the battery. More likely the connection points. My bike has done 3000 rocky miles in the Peak District so it could be wear on the pins/battery connection...

I borrowed a battery from a friend whose Haibike is working fine and the same power loss happened. So I don't think its the battery More likely the connection points.

Great, thanks. I have cleaned the pins and slots on the battery with electrical contact cleaner quite regularly. I'll do it again and apply the grease as you suggest. Having borrowed a battery and ended up with the same problem if it is an electrical contact issue its likely to be the pins.

Very useful. I did have a similar problem with error code 71 about a year back. Solved it by cleaning everything with electrical cleaner. This time no error codes. But - where did they put the dielectric grease? On the copper prongs that go into the battery (probably not the fight technical...

Ran all the self-diagnostics as per the Yamaha PW-X2 manual (very useful), all good. Checked all the wires and connections to/from the motor - all good. Has to be the bike shop now...

I have been through the manual, no mention of a separate battery for the controller. It is powered by the main battery. However, there are some self diagnostics I can run through the controller to check the speed sensor, torque sensor, motor current etc... Next job

Tried a friend's battery, same problem. So it's not the battery. I guess it's now a trip to the bike shop.

Thanks very much, I'll have a go at that and test it out.

Hmmm, could be about the same battery level, both recent rides have been roughly the same route and the power shut off in a similar place. The motor seems to lose power immediately before shutting down. No noises from the motor, soon as I switch the controller on again I get power, just not as...

Yes, roughly, the ride starts OK, no odd noises, power levels working as normal. Then suddenly mid ride the power cuts out. Having read a few articles I am beginning to think it is a battery issue. But no error codes, no overheating (as far as I can tell) and battery levels seem fine....

It's a Yamaha PWx2, no error codes. Its my second motor, the other one just died, this problem seems different

I have a Haibike All Mountain 7, 2 years old, approx 3000 miles. My ride starts OK, but after an hour or so I lose power suddenly and the controller turns off. I can then restart the controller but after about 3-4 minutes the power cuts out again. This continues to the end of the ride. It seems...

Everything just failed, no power and an error code on the control unit.

On a ride yesterday my motor kept cutting out and showing Error Code 71. Has anyone else experienced this problem, and if so is there a DIY fix or does it need to go back to the bike shop? Bike is less than 2 years old and on its 2nd motor, All Mountain 7. Thanks

If its the same set up as the All Mountain 7, I bought a 38T 104BCD Raptor Chainring from Superstar components works well

Afternoon Boots. Honoured to be contacted by the UKs Haibike celebrity … I don’t jet wash the bike just gentle wash with soap and water and baby wipes. I think the water has leaked in from the rain and puddles. I do monitor torque settings but not on every ride. The stay just came apart due to...

I think I have had the full set of problems with my All Mountain 7. Needed a new motor when the torque sensor failed. Rear triangle has been rebuilt by Raleigh/Haibike after the swing arm came apart, and now the headset bearings have seized. When I removed the forks the headset was full of rusty...