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I am also thinking that it would be better to test with another battery first before I conlude with anything. I will contact the dealer and ask if they could possibly send me one, although I doubt they will. I bought the bike privately and had had nothing to do with them previously. Shipping...

Hi all. I had a post recently about my battery (18Ah) discharging when the bike was standing for a week or so. The battery indicators both in the display (LCD) and on the battery (LED) would jump from say 5 to 2, in one week without use. This happened three times in a period of one month, and...

I will do some testing off-bike as suggested, to isolate the problem. I bought the Kalkhoff second hand, from a gentleman that bought it in Flensburg in Germany. I have the warranty card, but haven't checked the warranty details yet. Hopefully it will cover battery problems within two years from...

:) I wish that would be case, unfortunately the kid is too small and wife shows no interest in biking. And it's locked and I have the key.

Hi all. My 18Ah Kalkhoff battery suddenly started to discharge itself during periods when the bike is not in use (battery is left on bike). Within one week it can go from 5 bars / leds to 1, or from 4 to 1 blinking. It has not done this before. I am dismayed :(. Can I assume the battery is...

Thanks for the input James. You are of course right about your calculations. I have concluded that the bigger chainwheel does not really matter, but I will increase the chain length with one link. My old chain has some 1100 km's on it and is bound to have streched some.

Thanks for the link Alan, but I forgot to say that the Kalkhoff Sahel has a Shimano Alfine hub gear, so the chain sizing methods covered on the Park Tool site do not apply.

Hi all. I have installed a larger front chainwheel (42 instead of 35 teeth) on my Kalkoff Sahel. It has a spring loaded tensioner in the back, and this points straight down now, instead of slightly backwards. That is because the chain is 7 links too short now. Bike runs OK, but will there be...

Hi all. Just wanted to share some nice pics from Trondheim taken today. I took the Kalkhoff up to the Graakallen mountain above the city, some 5 km from where I live. It's tarmac almost all the way up, and then some hundred meters of gravel road. The incline is very steep. Cyclists use this as...

OK! Thanks all. Will take it out immediately, and charge it before further storage. Still full winter here in Norway, I'm afraid, -10c outside today. eddieo: I bought this bike second hand in september from 'Pedal Anton' on this forum. It has some 800 km on it, but looks absolutely like new...

Thanks Scott. It sits in the bike now. Should I take it out? Regards, Michael

Hi all. I have a question about winter (long term) storage of my Kalkhoff 18Ah battery. The bike has been standing unused since october. How often (if at all) should I charge the battery during the winter? I charged it once in november, and now it again has only 3 of the 5 lights lit when I...

Well, just to end this thread; the dealer gave me a full refund. Guess I was really unlucky with that one. It's packed and ready to be collected by the carrier. I'm a bit unhappy to see it go I must admit, it is a nice looking bike. Now what to do next, do I dare to buy another one?

I got a replacement display in the mail today, taken from a working demo bike. Still the same error, "Lo" blinking in the display, no power. I have told the seller to take the bike back.

I agree. I'll let you all know how it works out. Michael

Hi all. Just wanted to say that I am in touch with Wisper now, and am confident that this problem will be quickly sorted. I have an engineering background and know that sometimes new things fail, so am not really worried about the technical issues. I admit I was fed up at some point, due...

I checked the main fuse on my battery more closely later last night, and now I know why there was plumbers tape wrapped around it. The threads are gone. The fuse holder is obviously used. When I confronted the reseller with this he said "yes the threads are bad on these, poor design. But the new...

Got a new battery today. No joy - still the same problem. Next step will probably be to change the controller. Michael

I removed the plumbers tape (white teflon type) on the main fuse body btw. It seems it was there to make it watertight? Don't know who wrapped that on... The factory or the reseller? The fuse body shows no damage or any sign of overheating. Michael

I also thought I got a demo bike, so I checked it very carefully. The front and rear discs do not have any wear, and there is still "flash" on the tyres. The speedo shows 00000,3 km. Under the tape the speedo is new. On the other hand it has a few scratches and other marks that a new bike should...