Viewing 23 posts - 121 through 143 (of 143 total)
  • Tongsheng TSDZ2 ebike kit
  • Premier Icon Tim
    Free Member

    A little reading suggests its common and is poor tolerance in the shell/bearing.

    I currently can barely get to my workbench in my shed as it’s full of decorating equipment, a door and a half started kids bike project (and a Jeffsy with no shock fitted that’s a pain to move)

    Need to sort that lot out and then I’ll get the Rig on the stand and take the BB apart and report back 🧐

    Premier Icon tjagain
    Full Member

    Someone was asking about sealing on these. I took the side cover off – the bit that covers the electronics and motor and was impressed that it had a proper o ring seal in the cover.

    Premier Icon Tim
    Free Member

    I read somewhere they are IP44?

    Well, the shed is tidy and I have a list of bikes to spanner, so hopefully I can get the bike apart and work out what I need to do.

    It’s working fine though, but definitely needs some general TLC. I think several months of wet commutes hasn’t done it much good 😉

    Premier Icon Tim
    Free Member

    After a new offset 42 max chainring. Has anyone seen a source that isn’t £85?!

    Premier Icon tjagain
    Full Member

    I thought they took standard chainrings or are you looking to have a different chainline?

    Premier Icon Tim
    Free Member

    You can, but they come stock with an offset chainring to improve the chainline

    Premier Icon tjagain
    Full Member

    Ah – I just had a good look at mine and you are right

    Premier Icon slowol
    Free Member

    Superstar sell them for about £30 to £35 but depends on which fitment it is their stocks look low. Could be worth emailing to ask about availability.

    Premier Icon Tim
    Free Member

    The superstar chainrings are 4 Bolt and it looks like the offset is in the thickness / bolts rather than at the teeth to clear the motor

    Premier Icon simondbarnes
    Free Member

    Did you ever get round to changing the bearings on yours @tim ?
    Mine are in need of replacing now.

    Premier Icon tjagain
    Full Member

    simon – has it got worse? Mine had a tiny bit of play from ew that felt like a knbackered BB but 1000 miles on its still the same

    Premier Icon simondbarnes
    Free Member

    I’ve only just noticed the play @tjagain to be fair. Was just cleaning chain & cassette and fitting a new gear cable and brake pads.

    Will keep an eye on it.

    Premier Icon Tim
    Free Member

    simondbarnes
    Full Member
    Did you ever get round to changing the bearings on yours @tim ?
    Mine are in need of replacing now.

    Disassembly is fairly easy, just be careful with the torque sensor assembly. The bolts are a bit cheesy / shallow so take care.

    I didn’t do anything with the torque sensor but replaced the LH BB bearing and the sprag clutch.

    The BB bearing is really easy as the tolerances are shite so it just floats on the axle and in the shell. I used a fair amount of retaining compound and made a big difference.

    If you want to replace the sprag clutch you need to remove the final drive gear. I needed to use a gear puller to remove it, using the spider to pull on.

    The sprag clutch needed pressing out on a fly press at work. If you have access to any sort of press or bearing puller it should be fine. I wouldn’t smash it out.

    Give me a shout if you need help

    Premier Icon simondbarnes
    Free Member

    Cheers 🙂

    Premier Icon Tim
    Free Member

    Oh:

    Final drive comes off first as the gear puller pushes on the end of axle, then the circlip can come off and the BB assembly comes out of the LH side.

    Premier Icon simondbarnes
    Free Member

    I’ve put another 1000km on it and play hasn’t got noticeably worse so can hopefully avoid tinkering with it for a while 🙂

    Premier Icon cartwheels
    Free Member

    Stealth ad
    I’ve a tongsheng kit and battery for sale .
    The motor has a fault which I believe to be a broken torque sensor so will be cheap for spares
    Pm if of interest

    Premier Icon Tim
    Free Member

    Approx. 1800 miles and mines developed a fault. Pulsing noise rather than whine when under load.

    Stripped it apart and the ceramic torque sensor ring has cracked. Possibly as a result of clumsiness when I stripped it down to change the bearing but could have been a fault from new that’s steadily got worse. It shouldn’t have any impact through it but it could be general shock and vibration.

    New sensor ring on order from PSW power for £17 delivered.

    Cartwheels – you can buy a whole torque sensor assembly new for about £65, but it may just be the sensor ring as above. AliExpress is your friend

    Premier Icon Tim
    Free Member

    simondbarnes
    Full Member
    I’ve put another 1000km on it and play hasn’t got noticeably worse so can hopefully avoid tinkering with it for a while 🙂

    There is some float / backlash in the assembly from new, and the tolerance isn’t great so some seem to float more than others. The LH BB bearing tolerance is particularly poor.

    I would watch out though as it appears that too much bearing play could mean the torque assembly is damaged as it could rub/bind.

    I am going to experiment with something better than retaining compound to improve the BB bearing tolerance, but need to be careful with the housing as the bearing sits alongside the spline for the torque sensor so I don’t want to foul that.

    Premier Icon Tim
    Free Member

    Cartwheels – if not, how much are you looking for as is?

    Premier Icon jkomo
    Full Member

    Tjagain, Tim, SB, what do you think a year or so on? s a spin off from the other thread on EB’s, I’ve got a couple of 26’ers I could convert, rather than shell out for a new bike to commute on. I imagine electric bikes will sell out very quickly.

    Premier Icon tjagain
    Full Member

    I don’t use mine as much but it still works as good as new, battery still has the same life.  I think they are great bits of kit.

    the only thing to watch is they don’t fit all frames – sometimes they clash on the chainstays if the bike is set up for clearance for fat tyres

    Premier Icon simondbarnes
    Free Member

    Still happy with mine. It’s done around 4500km. Even survived me falling off it on the way home from work on Friday.

Viewing 23 posts - 121 through 143 (of 143 total)

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