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Max 23 amps if derestricted. What setting are you using off or on road ?

What is the controller amps rating ? Its not the motor but how power the controller draws from the battery.

Spiked tyre on my commute/town bike no issues.

Possibly some sort of a racket of some kind. With batteries most logistics only appear to play ball with companies and not the private citizen, separate rules for one and another set for the other. Hobby King not to the EU, but Nkon O.K from Holland to UK and both have been delivered via PF.

500wh for the extra range and safety net if planning on 40 mile rides. Not much fun riding unassisted.

As I see it Cat wants max power from the offset ! Ebikes aren't like that they are not designed to be escooters, twist and go is illegal on bikes made after 2016. You can get max power by selecting the highest assist level (usually pas 5) , though unless you have an illegal throttle in use you...

The one in the first link Dave.

Never use cable ties on wiring as they can pinch the thin wires breaking them, instead buy and use double sided Velcro.

Legally and not to risk confiscation by customs you can't simply post it back. An arranged courier would have to pick it up if at all possible. Safe bet is to speak to Jimmy at BGA as he deals with all shipments to and fro safely.

When soldering the sense wires together, you must check the original wires connected to the battery to ensure the voltage of each one is correct to start with otherwise a misplaced wire can bugger the BMS. Once the order is confirmed just jot it down so no mistakes are made. On the new BMS, the...

Most likely scenario then, it is due to the controllers main capacitor charging up from the voltage in rush when the battery is turned on. The click or noise is most likely a spark between battery and receivers contacts.

No link, they do three saddles. Narrow road bike/mtb. Middle size trekking, I have 3 for use on mtb, 700c & Swizzbee. Wide size or the one I call for large bum's.

That's pretty good, so the main issue is a pick up issue. Either wire/controller fault. Loud buzzing noise could be a poor phase wire contact so next time you venture into the motor check the tightness of the three phase connections. If necessary gently crimp then together tighter.

Lipo is nothing to be afraid of, just a case of being familiar of how they should be cared for and treated. I have a pair I use that have been modified to accept a BMS to make my charging simpler and easier. I also have a small 4ah high output one I use for my palm size Arduino spot welder and...

See how he gets on and if you need more info/help, just post away and we will try to guide /help out.

If they are looked after and given respect they are relatively quite safe, if the basics I have outlined are adhered to then they should provide 18 - 38 months of use. No polymer is any safer main reason why lithium ion is used is the hard casing of the battery and the chemistry is more...

Read thru this tutorial form the massive and knowledgeable Endless-Sphere forum. https://endless-sphere.com/forums/viewtopic.php?f=14&t=52240

Welcome to world of diy ebikes and over volting :D:D.

Go to lidl when they have bike gear in the aisle (about twice yearly) and buy the medicus gel trekking saddle for under a tenner, one of the most comfy saddles around as a few on here will tell you.

:eek:Oh dear !!! Your brothers friend should have given you a thorough guide on to how to use them, if he understood the risks they can carry. You have been given a pair of 10ah lipo's ( lithium polymer) a slightly more risky and dangerous chemistry version compared to lithium ion. The...