What do I need?

[NeilJ]

I really need to upgrade my ebike/chair and would like some advice.
At the moment it is using a controller and motor (36v 250W) from an old Powabyke shopper with a 9ah Li ion bottle battery. It has performed well but I now want a bit more torque if possible.
I will be wanting new forks, new motor, new controller and as my understanding of the motor/controller combination is a bit limited maybe you could let me know your thoughts.
Picture of what I have at the moment.

 

[Benjahmin]

Woosh's BPM kit is renowned for its torque and hill climbing ability.
http://wooshbikes.co.uk/cart/#/category/uid-4
Also very torquey are the Ezee kits, though a lot more expensive.
http://cyclezee.com/ezee-conversion-kits.html
Both would have disc brakes on, which has got to be better for you.
May be worth a chat to both as they may have specific ideas for you. I've always found Cyclezee very helpful and woosh service was great when buying the wifes Big Bear.

 

[Nealh]

The BPM Big Bear Kit is good and powerful it has a loaded wheel speed of 201rpm, though is marked 350w. The kit I have is Sq wave/ unsensored so a bit noisy, it saves having to use a bell to let other users know you are approaching. Maybe they have progresses to sensored hubs ? The hub alone is approx. 4.2 kgs. One upgrade to go for is a front hydraulic disc brake to replace your existing one long with compatible forks.

If you are going to use your existing battery then a
slightly lighter option is the Q100H at a lighter 3.2kgs but good for up to 20a, and a controller/kit from
here. The new Wuxing 108X throttle is excellent and much better to use then the standard ones.
http://www.pswpower.com/peng/pic.asp?
ModID=PicS224&TypID=S210052

Though depending on your battery age and condition a newer and bigger one will be better which has a 20/25a bms.

BMSBattery or GBK sell the controller that sits on the base of the 09/dolphin battery with a tidy plug and play
wiring kit/lcd/throttle and pas which is of no use for your needs but you can flog that to recoup 10/15 quid. Others like them and they appear to work well however the one I got didn't last long and it smoked.
Links below.
https://bmsbattery.com/2_headway
http://www.greenbikekit.com/

 

[soundwave]

 

[Nealh]

Alternately upgrade the battery to 48v to get 25/30% more torque out of you hub also speed would increase if you needed it. Most 36 controllers will take the extra voltage, however the hub may be a bit weedy and not like the extra oomph.
Alternative uk battery supplier.
http://www.eclipsebikes.com/

 

[Woosh]

The kit I have is Sq wave/ unsensored so a bit noisy,

BPM motor kit:
If the OP is going to replace the old battery with an HL battery, I can supply 17A LS1260 sine wave controller (in place of the 20A controller) that acts also as the battery cradle.
The BPM would then lose 15% of grunt but run quiet as a mouse (well nearly).
You can just about see the controller in this picture where the wires come out.

 

[Deleted member 4366]

The limiting factor is your battery. That's the thing you need to replace. Is your motor brushed (2 wires) or brushless (3 or more wires)?