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OK. IMHO They usually go behind the downtube for the saddle, but each to his own! Show us some pictures when its up and running please. Andy

My guess is that the bearings need the slack taken out, e.g. correctly adjusted, that could be axle or headset bearings. Also, I would guess that the brake is wrongly set up. Have you had disk (I assume?) brakes before and fully understand the adjustment procedures? It is not quite so easy till...

My last and final tip, which will upset some here, is if you stay with e-biking, don't buy anything with a middle motor......either front drive or rear drive. Be VERY wary of anything secondhand.....especially with regard to the state of the battery....But you may have learned that lesson...

I assume that it is brand new, and you have measured the clearance behind the down tube, and that the voltage is correct. Best of luck. Andy

You did not answer my questions, so let me repeat, if you are not a long term committed and qualified DIYer, with regard to both electronics and electrics, do not consider opening up an e-bike battery, as it can become a fire bomb! This guy thought that he knew what to do:- Starting such a fire...

If you are convinced that its right for you, then use a laser system to kill the roots. The most popular one that I have seen is No-No, ads on TV from time to time. I bought my wife a competitive system some 3-4 years ago, because as she got past 60, she was starting to get fluff on her face. 2...

Assuming that you buy one, do please let us know if it helps you in any positive way, as I hope that many here might be helped further with any problems they might experience. Also, any negative effects you notice, also please mention. As I believe that now several people here have bought them...

You may find that purchasing and e-bike tester may help you further, though as I do not have (or need) one, I cannot be 100% sure, but they apparently test out many parts for correct operation, of the controller, the motor, the hall effect sensors, brake sensors and much more, for proper...

IMHO before doing anything else, get the battery checked out for full functionality. On older and especially 2nd hand bikes, this is the main source of problems, even though it appears otherwise to be OK.... I hope its not defective, as replacement rf re-celled batteries are not cheap. If you...

Flashing rear lights which many have (here in Germany), but are totally illegal, as they do not conform. May I suggest that have two rear lights, only one flashing, may "deflect" the police, but just guessing on that point! Flashing rear lights on their own, might still attract police...

Bad luck. Andy

I have a similar unit that in a storm, let water in, so I opened mine up, let it dry out in a warm room on a radiator, then sealed it up properly and it was fine. Give it several days to dry out before closing up. You have nothing to lose. If you carry with you a see thru plastic bag, and you...

If it is as dead as you appear to say, like nothing works at all, you may have a problem with the wiring loom, a connector (probably the battery one) or even a fuse in the battery. The best tool at this point is a volt or multi-meter (switched to volts), and a good friend that understands volts...

Do you know someone with a micrometer? I myself went through this and there are several saddle posts, optically close to mine in diameter, the only way to be certain was the micrometer... Or careful usage with a reasonable caliper should also be OK. Calipers come in electronic format, for around...

What is really needed is a dummy load that draws say about 10 amps from a nominal 36 volts, to see if the voltage collapses or not, due to damaged cells. So a high wattage resistor of between 3 and 3.5 amps. Current will vary depending upon the actual battery voltage at the time when tested...

Good clear pictures may help to find a passable charger. But also, how did you decide if the charger was faulty, its generally the battery. Also, never forget that the green LED for charged has several other "meanings" that only a volt meter can decide.... One of them is battery dead, cannot...

Very true!! Andy

Some e-bikes have a way of resetting them, try that and see if that helps. I believe that it could be possible that the old defective battery has given both bikes the same error. Its certainly very strange.. Andy

It really does sound like a defective battery. Usually bike batteries are fully charged in 6 hours or less, leaving it even longer just accelerates the damage further....Though I think that it is beyong help anyway... Regards Andy PS. Learn how to look after bike batteries so that you get the...

A clear or neutral coloured sealant may be helpful, I use one that I buy off ebay quite cheaply that also glues things together (bathroom sealant does not stick to some things!), as well as sealing. And its also heat resistant! Its number 705 and is very cheap, with a slow delivery from...