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  1. Sturmey

    Yose power, 700c wheel, rear or front question?

    Hi. Just to add to above, I have fitted and used both the front 250w and the rear 350w yose hubs on 700c wheel bikes, so here are my observations. Both kits have some similarities but there are important differences and both kits have there advantages. The 350w rear kit has a motor rpm of...
  2. Sturmey

    Knocking Q128C motor.

    Its a geared hub with inbuilt clutch so when you spin by hand, the motor itself does not spin (but there is usually some light movement in the 3 planetary gears and clutch). These gears (and wheel bearings) are relatively cheap but motor has to be dismantled. I have no actual experience with...
  3. Sturmey

    Knocking Q128C motor.

    It hard to tell. It could be a wheel bearing either I suppose. With the bike turned off and wheel not moving, try grabbing the freewheel gear cluster with your hand and check for sideways movement. Also check wheel for roughness when spinning forward with your hand. One way to eliminate the...
  4. Sturmey

    Knocking Q128C motor.

    The freewheel can give a very deep knocking sound if bearings loose. It sounds as if someone is hitting the hub with a hammer every turn of wheel.
  5. Sturmey

    Tongsheng crank wobble - can I use Loctite?

    These guys claim that they contacted pswpower (april 2019) and was told that the wobble in axle was normal, so I reckon I will still keep using the bike. https://endless-sphere.com/forums/viewtopic.php?f=28&t=79788&p=1458854#p1458854
  6. Sturmey

    Tongsheng crank wobble - can I use Loctite?

    Hi. I have some similar type looseness/wobble after a few hundred Km but its not so bad as to cause scuffing. The left side seems to be worst and I have seen it suggested (endless sphere) that another second bearing can be made to fit in here, although there is some concern about how to remove...
  7. Sturmey

    BBS01 Chainrings

    I am not specifically familiar with your set up but I was similarly unhappy with chain line on TSDZ2 with the lower gears. Anyhow I managed to dismantle the gear cluster and rearrange cogs to give a wide spread of ratios over 7 speeds with the chain line on the 18 tooth cog. i.e...
  8. Sturmey

    Pas sensor issue

    Hi. Those voltages look low. Normally (there my be exceptions) hall sensors are powered from the 5 Volts in the controller, sometimes fed via a diode , so I would expect something between 4.2 to 5 volts on the controller side. Try disconnecting the pas unit ( in case there is a short circuit in...
  9. Sturmey

    Pendleton user manual

    No problem. Ignore my key number on third page. PS. 2017 model, may be some differences.
  10. Sturmey

    Conversion kits and the law

    I have attached a copy of EN15194. Its dated 2009 so I'm not sure if its up to date. Anyhow, if you read the document, you will see that the 250W refers to maximum continuous mechanical output power (measured at wheel) and not the electrical input power to motor. There is a complicated graph and...
  11. Sturmey

    Pendleton Somerby Ebike Battery

    One further test. Try removing battery from bike (you need the key) and then try to recharge. I am disappointed to hear that Halfords wont look after you. I am a bit slow to recommend you a replacement battery as they are quite expensive and there is no 100% guarantee that they work or indeed...
  12. Sturmey

    Pendleton Somerby Ebike Battery

    I think Halfords gave a two year guarantee with that bike and battery. How long have you the bike?
  13. Sturmey

    Pendleton Somerby Ebike Battery

    I am a little familiar with that bike. But some more detail. Normally, the charger plugs in and the red light comes up on charger to indicate battery is charging. After a period of time (about 4 to 5 hours max), the light turns green to indicate battery charged. The charger also gets a little...
  14. Sturmey

    Pas sensor issue

    I changed one like that lately. I got this photo online and seemed ok. I think yellow was the ground and blue the signal in my case but let us know if photo not ok.
  15. Sturmey

    Any other controllers that will work on Yose power 350w

    Hi. I have fitted both the yose 350w kit that has no light function and a yose 250w front wheel kit that came with the extra wire in control cable and extra front connection that connects to supplied front light only. Both kits had almost identical KT 15A controllers and LCD3. The front light on...
  16. Sturmey

    Any other controllers that will work on Yose power 350w

    Be careful. The light function controller uses a 9 wire 1T5 control cable so you may need to also purchase this to get the light to work.
  17. Sturmey

    Controller MOSFETS and question on failure.

    Pulse Width Modulation (PWM) is used. Plenty of explanations on line e.g. https://en.wikipedia.org/wiki/Pulse-width_modulation
  18. Sturmey

    Battery unbalanced

    You have to be very careful You have to be very careful if doing this as the individual cells are not fused, and the wiring wearing or shorting could overheat a group of cells and cause fire. Its also a tedious job individually balancing the cell groups. (It is generally recommended not to...
  19. Sturmey

    Battery unbalanced

    Some batteries have to be turned on to balance. But I have a small (7ah) cheap battery that has a small BMS (no load resistors) that does not have a balance function and needs to be rebalanced manually every few months, which I do myself. I believe this (no balance function in BMS) is common...
  20. Sturmey

    700c Wheels to 26" Wheels

    How about a 69er i.e 26 inch on rear and 700 with larger tyre (29) on front. Then transfer speed sensor (if possible, but might involve piecing extra wire length) to front wheel so there will be no speed error.