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And it's one of those cheap duct tape LiFePO4s you see on Ebay, my money will be on the BMS. Many of these duct tape BMS circuits have proved inadequate in the past. (The Ping BMSs excluded)

Sounds like one of: a) Duff battery. b) Duff BMS inside the battery. c) Duff controller. (The battery seems able to supply a little power, but as soon as he demands more power [by turning the throttle or pedals] the battery "can't" supply anymore and in the controller senses "a dead...

Thirded. Electric vehicles really aren't green without some form of "carbon-free" energy. Nuclear is the only viable/available option at present. (I'd love to see the development of Thorium based fission, which has far fewer drawbacks vs the current uranium based cycle, but the public's mind is...

Can someone explain to me the advantage of these single axle vehicles? As flecc points out they are extremely complex (read expensive and prone to failure). Is it just road footprint (compared to 4 wheels)? Turning circle? What merits all that extra complexity?

Yep. Duff freewheel mechanism. You need a new freewheel/cassette...off you go to the bike shop I'm afraid!

Or use another cable lock to lock the front wheel and frame to your "solid object". You get slightly better security of the whole bike that way too.

Hard to say. It looks about the same size as a Suzhou Bafang, which would indicate that it's geared rather than direct drive. Apart from that you can't really tell! (Edit... Hold on the description says it's Direct Drive! At that size with direct drive I wouldn't expect much torque unless this...

And flashing blue headlight? :D

I think if you are going to go off road you might want to: a) Avoid hub motors. The axles on these are weaker than normal hubs due to the need to be hollow to take the cables. Especially avoid the Tongxin motor which doesn't have a complete axle (it's in two halves), and is prone to breakage...

Looks nice. Is that Dahon based by any chance? ;) :p

Once you've "streamlined" the bike by losing the weight, pumping up tires, using the thinest tires possible etc etc. The speed of the motor is largely defined by the voltage of the battery so the next "upgrade" is to increase the voltage of the battery. This is a non-trivial upgrade!! To...

Well for a Wisper (which has an "oversize" threaded/quill headset) you'll need a: 309 n'lock with Quilladapter for 25.4mm Not sure what 302.029&030 are but it says they are included with 309 anyway. Shipping is 7E I wouldn't have thought you need new handlebars, you can use the...

The seller is a bit confused about the spec though: First he says: High Power 36 Volt 3 amp Li-ion Battery Charger Then: Output: ( 36 VCD, 42.2 V -- 2.5 / 1.5A And apparently input is in the MHz! Good deal though. BTW what makes these different from a constant voltage Lead Acid...

I've been taking the Wisper down to see the hippies in the City...

Sounds like the battery might be shot IF: a) The pedelec only turns on say 80% throttle (like my 2007 Wisper does). b) You turned the throttle to 100% Basically my theory is that 100% throttle is too much for the battery and the load causes it to dip the voltage below the low voltage...

You could probably treat the alien kit as a bunch of parts that Mr Alien has brought together. If you get the Suzhou Bafang version (provided he still sells it), upgrade to a faster machine would be something like: 1) New 48V controller £30-50. 2) New 48V battery (several hundred) or 12V...

Cheers Flecc, that's good to know.... it's a case of No User Servicing Required! :D :D

OK I can see that. It would make changing from bike to bike a bit easier. Serious amounts of circuitry! Having to worry about interference from other units, conforming to radio interference regulations, health & safety about having a small microwave attached to the handlebars etc. OK you as a...

And just why make it so complex that you need a 2.4ghz transmitter and receiver in the first place!?!? :confused: What's wrong with a few strategically placed wires?

Eeek! Thanks for reminding me. Now I'll need to get a freewheel removing tool... Anyway, perhaps Flecc's web pages on the Quando/Torq have some info as that's an SZ motor... Yep here's something from "http://users.tinyworld.co.uk/flecc/motor.html#bookmark6" "Those orbital gears act on...