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If you buy a second hand, most of the depreciation has already been taken by the first owner. When you come to upgrade, you don't lose much. But if you buy a new battery for it, it is going to double the cost of your second hand bike. Before you go down the road to upgrade anything, ask yourself...

if you want to keep fit, the woosh Zephyr-B is better. It has same motor as the Big Bear but a bigger 52T chainring, the Big Bear has 44T, the Zephyr-B has lower cadence and will encourage you to pedal more. http://wooshbikes.co.uk/?zephyr-b

for Chinese crank drives like the Woosh Krieger, the maximum efficiency is at about 60 RPM, maximum power is at around 52 RPM (at the chain ring), roughly coinciding with the natural cadence for leisure cycling. For the legal BPMs like the woosh Big Bear (motor winding code 13), maximum...

yes, it's suspended by a coil spring in the middle. Seasick on a bike? perhaps, especially going over speed bumps. It's a bit weird at first but you get used to it in a few minutes. Also, single speed does not help with pedalling.

If you can't find any suitable second hand, ask Hatti @ woosh for a Mono. These used to be sold for £399 and they are good on hills. They are no longer sold on the woosh website but I think they still got one, she probably can give you a good deal. http://wooshbikes.co.uk/mono.html

a second hand bike makes sense. You soon save enough money to buy a better bike next time. Don't bother buying a new battery for it though. Most ready built bikes are optimized, upgrades are uneconomical. If the woosh predictor recommends the zephyr-CDN, it's because you have serious hills in...

It looks like a 47cm frame, 26" wheels. You measure the seat tube from the bottom bracket to the top of the seat tube.

one gaping security hole is the Java runtime plugin for web browsers. Many victims of this type of attacks did nothing more than playing a traditional card game like bridge or backgammon on a dodgy website. The game asks you to activate Java - who would refuse? Java is on at least 5 billions...

Cryptowall can attack both Windows and Mac OS. It relies on you mistakingly run the app under your login. Anything you have access to can be locked away. Cryptowall leaves all OS files untouched, until it completely encrypted all your documents. You can open Cryptowall infected email...

they try to beat 8-Fun on quality and sophistication rather than price. The issue is how reliable their torque sensor is. Replacing a thumb throttle is easy, replacing that torque sensor is a specialist job. Britain has a love affair with the throttle whereas it's natural to have torque...

I doubt that IOS or Android or Linux is any more immune to this kind of attacks than Windows. You need to set up a backup server with previous versions that reads your computer while your computer cannot access the files on the backup without logging onto the backup server first.

the lock or the ouput connector maybe of the wrong shape or placed at the wrong postion.

or buy a smilarly shaped 16AH behind seat post battery and transplant the cell pack to the old case. A new 16AH battery costs about £300-£350.

I use CPC (part of Farnell but cheaper). http://cpc.farnell.com/

you can cut the legs of the suspect FET, use a solder sucker to clean up the holes. If your diagnosis is correct, the BMS should work again. Then solder in the new FET.

don't worry, it's a non contact magnetic system, it's not entirely waterproof but certainly splash-proof. The electronics is inside the torus, the cable exit point is sealed. The damage is usually caused by salt in the humidity.

The main advantage of the XMAX unit is higher torque and because it has a torque sensor, it will suit donor bikes with hydraulic brakes. It is extremely simple to install. You only need to attach the motor, battery and LCD, that's it. Brake sensors are optional. It will also be better...

billy, the dongle does not fit your Cyclamatic. It's made to defeat the electronic speed limiter fitted into fast e-bikes with poweful motors like Bosch, Impulse, Panasonic or Yamaha. Your Cyclamatic is already optimized, you won't be able to make it go faster without spending a considerable...

Have you looked at its torque sensor? does it use strain gauge or spring loaded displacement?

yes, it is.You'd want to have a comfortable riding position. If you go for a crossbar, the frame size should be 18" (47cm).