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  1. brumbrum

    Qulbix Raptor 140 frame and rear shock. NEW. U.K £350. Seperately. Brakes, Down hill forks, cranks, bottom bracket

    I've got a brand new in box Qulbix Raptor 140mm wide frame with rear swing arms, seat assembly for bike seat, all accessories, and also with DMN rear shock. The frame is for pedals, and has 55mm wide rear arms for rear motor like QS 205 , Cromotor etc. £350 plus post. u.k seperately... I have...
  2. brumbrum

    Kelly controller KBS36051X. 25-60amp. U.K only

    I have one brand new. Kelly controller KBS36051X 25-60amp U.K only. Bought from Kelly website but never used. It has a bag of bits with it including all connector plugs etc. I specified that it was waterproofed. Here is a link to it on Kelly’s website...
  3. brumbrum

    Custom made #219 pitch sprockets?

    I have an lmx161 and want to soften the chain and sprocket noise by enlarging both front and rear sprockets. The front 12t sprocket is the noisey one but if I want to keep the same gearing 1:7.8 I will have to enlarge the rear sprocket too. The rear sprocket is go kart fitment, but sprockets...
  4. brumbrum

    How to connect 3 speed switch to kelly controller? (Kbs)

    I have a 3 way switch with 3 wires , anyone know what wires on a kelly controller will make the switch operate? At a complete guess, looking at the top connector in the image, could it be pin 7, 9 and 6 (pwwr, relay, ground) :? Or have i got this completely wrong?
  5. brumbrum

    Wanting to build my 5 year old an ebike. Where to start?

    Hi guys, i have built many ebikes over the past 8 years for myself, family, friends, but i now want a new project building a small motored bike for my daughter who is not quite 6 years old. She's been a fully fledged bicycle rider since before she was four, and rides daily up front on my LMX 161...
  6. brumbrum

    Help needed taming throttle on Kelly Kbs controller. Picture inside

    Does anyone have prior experience with throttle settings on kelly controllers? I have a lmx161 dirt bike recently built. The initial power delivery is fierce, and the first cm of movement on the hall throttle makes it very difficult to control the bike at low speed or to get a small punch of...
  7. brumbrum

    Kelly KBS controller variable regen setup issues

    Here's the issue.. I can get regen when releasing throttle i.e regen kicks in automatically on closed throttle. This is not ideal for me, but at least it shows regen is working. I have wired in a thumb throttle via a cable connected to 5v, ground and analogue brake signal wire on controller...
  8. brumbrum

    Bulk charging 16s lipo with 20s charger

    I know it is not a wise move, and know all the dangers (permanent observation will be given), but if i want to bulk charge a 16s pack upto about 4.1v per cell with constant current from a 72v nominal charger, is there any reason i cannot do it? I figure that as along as the voltage of the...
  9. brumbrum

    Kelly KBS... Does it have Auto identification

    I cant find anything in the user programming software, or on Kelly website. As far as i know the KLS sinewave series has it. I am setting up the KBS and currently the motor is running backwards. Anyone know if the controller automatically corrects the hall signals leaving me to just swap the...
  10. brumbrum

    Andrew's LMX 161 Chain-drive massacre Build Log

    Time for some mid-drive madness :D Got myself a base kit from the lads at LMX in France just before they begin pushing out the homologated 161 road legal model to the early investors who have paid for the privilege. The base kit includes frame, swingarm, seat, motor, battery box, drive chain...
  11. brumbrum

    Do i really need a pre-charge resistor line for my kelly controller?

    Due to bike and battery box design i am having trouble finding a place for the pre-charge resistor placement for a new kelly controller.. KBS72181e ( square wave brushless). I never used one on my lyen controllers, do i really need one on a kelly? Anyone using a kelly without one? Thanks...
  12. brumbrum

    Is regen still possible with this kind of bms?

    Its just occurred to me that as there are seperate ports for charge and discharge, does it mean that regen is not possible? Here is an illustration..
  13. brumbrum

    CA programming cable ttl>usb, will this work?

    I need to update an old 2.3 wide screen CA will this cable work to update firmware?.... https://www.amazon.co.uk/gp/product/B075ZWZFV1/ref=ox_sc_act_image_1?smid=A2M4VA976IIDFP&psc=1 Its too expensive ro order from Canada to U.K Thanks
  14. brumbrum

    18650's... Less juicy than lipos!

    Just built a 20s 9p pack (72v 27ah samsung 30Q cells). This replaces a multistar lipo pack 20s 30ah (x15 4s 10ah). Yes there is a 3ah difference but yesterday on the first full drain of the 30Q's my bike went no where near as far and ran out of juice due to a 4-5v voltage sag and hitting about...
  15. brumbrum

    Cromotor issue... bad sound and lack of power

    Here’s the low down Cromotor, all good for past 2 years until now. added ferrofluid And hubsink, took for test ride, ok for 15 minutes doing hard start stops up to 120 amp to help heat motor and check temps. All good and then the sound came along. It happens with any sudden amp increase but not...
  16. brumbrum

    Any Tesla 18650 data sheets available from years gone by?

    Is there any info out there that correctly states how tesla car cells may have been different to average Panasonic 18650 cells? And is there any official data stating the AH and discharge rating of any of the tesla cells used over the past 6-7 years in their cars? I need to know whether if...
  17. brumbrum

    Cheap escooter wanted for wifes commute, any ideas?

    I need some help. My wife wants to be able to do a partial escooter commute to avoid city centre parking prices and congestion. Are there any good cheap deals around from China or otherwise? We are in the U.K and only need enough power for 10-15mph and about 25minutes of battery capacity each...
  18. brumbrum

    DIY Lithium Batteries: How to Build Your Own Battery Packs

    The book...... https://www.amazon.com/dp/B06XRKD15B/ref=cm_sw_r_cp_ep_dp_4d31ybNMDNDGF For a short time the ebook version for kindle/pc/mac/phone/ipad is very very cheap!
  19. brumbrum

    Dipping hall sensor in liquid tape, yes or no?

    I am currently up to my eyeballs installing an adaptto controller. I will be using a hall sensor near a magnet attached to the brake lever for regen. I need to waterproof the hall sensor and wires atached to it. Will it still sense the magnet if i dip it in liquid electrical tape to waterproof...
  20. brumbrum

    Help needed by someone familiar with the CAv.2.3 PCB

    I just opened up my CAv 2.3DP to find the throttle output wire soldered into the wrong place. I bought it new from Grin/ebikes.ca a few years ago. The green wire should go to 'Thd' on the pad but its soldered to 'ThO'. I Think i remember there being a recall on the 2.3 due to possible run away...
  21. brumbrum

    Cycle analyst direct plugin +lyen controller= no throttle

    After setting up an 18fet lyen controller with a CA v.2.3 with the jst direct plug-in connector i get no throttle response. I pulled out the green throttle signal(override)wire out from the the CA plug and the throttle now works but i have lost all the limiting features on the CA. All i really...
  22. brumbrum

    Andrew's NYX carbon frame + cromotor. full fat build log

    :D :D :D :D ************+***********ALL PHOTOS ARE NOW ON PAGE 4***********+*************** :D :D :D :D NYX Carbon frame/cromotor build log. I am stepping into new territory, up until now i have built a number bikes with small motors for commuting with the most powerful setup being a...
  23. brumbrum

    Cromotor v2/3 what kind of temp sensor, + what to read with

    Done some digging around, but can't find for sure what temp sensor is factory fitted on the cromotor. Also what device will work with this given type of sensor? Thanks Edited to say i have since found out it is 10k NTC, but what can be wired to it to get a reading?
  24. brumbrum

    Using lipo balance tap alarms when bulk charging. Yes or no?

    I was just wondering about having lipo alarms plugged in to balance leads whilst bulk charging a lipo pack. As there would be a small drain on the cells by the LED display on the alarms would this disrupt or hinder the charging? I thought it could be a good easy and cheap way to keep an eye on...
  25. brumbrum

    Multistar lipo 10ah + 50a draw = damaged pack(resolved)

    Edited to say, the pack is fine, it was a controller issue. I have a modified lyens controller that must use a special equation for setting the lvc. I had the lvc too high and it activating regen at 59v, this was causing the pulsing/pulling back effect Been using a 16s 67v 10ah pack over the...
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