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Technical Zone

1.3k Topics 11.5k Posts
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  • Suspension Related
    100 768
    100 Topics
    768 Posts
    HOTSHOT IIIH
    @reudtr88 The seller is right, the spacers and caliper bracket are narrower than the DT125R versions. The bench mock-up in the pics above comprised a 3ET DT200R swingarm, caliper hanger and spacers mated to a DT125R hub. As you can see the 428 sprockets lined up quite well (I also had to use a 3mm thick M20 washer between the caliper hanger and swingarm to get it as good as it could possibly be with the items I had to hand).

  • Exhaust Related
    64 569
    64 Topics
    569 Posts
    D
    as far as i m aware there are 3 different types of tzr the first model series 2 (RR) an tzr125r sp i have an exhaust with the code 4DL E46 10 20 what model is it intended for

  • Framework Related
    86 606
    86 Topics
    606 Posts
    CalumC
    That's normal. All DTs are like that. [image: IMG-20251011-114625.jpg]

  • Wheel Related
    83 749
    83 Topics
    749 Posts
    R
    Just measure from the inside of the fork leg to the rim on each side, +-2mm should be ok I think. If you release the nuts on the axle clamp on the right side (if I remember correctly) and pump the front suspension up and down, and then re-tighten, it should not bind. If the seals wear out too quickly, I would check the surface of the fork tubes, so they are not damaged (pitted from rust, flaking chrome etc.)

  • Electric Related
    267 2k
    267 Topics
    2k Posts
    R
    ..and you need the battery too, not just the regulator. Forgot to write that

  • Brake Related
    70 459
    70 Topics
    459 Posts
    CalumC
    Do you mean dual piston caliper? Or do you want two calipers šŸ¤­ https://ebay.io/m/yOnXyn Or have one made using Nevs design [image: 27961158925_26ab4db984_c.jpg] https://dt125r.co.uk/topic/1343/dt125-front-brake-caliper-bracket-dimensions/2?_=1772783708212

  • Engine Related
    546 5k
    546 Topics
    5k Posts
    R
    Clutch can make noises too, for example if the rubbers between the gear and clutch cage have gone bad. Check the play if you remove the cover.
  • S

    Clutch lever and brake levers

    11
    0 Votes
    11 Posts
    2k Views
    F
    I've got some eBay specials on mine, they were listed for the DT230 but fit ok. Might fit the DTR as well?
  • declanD

    Rad caps arenā€™t universal?

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    0 Votes
    9 Posts
    1k Views
    declanD
    @NINJA not a clue but luckily itā€™s not a problem
  • B

    Bike vibrating when revved

    2
    0 Votes
    2 Posts
    697 Views
    CalumC
    Either the balancer shaft, the engine needs timing. Or the clutch hasn't been balanced. The clutch needs to be reassembled in the correct sequence. See my kickstart conversion guide.
  • D

    What is this plastic part in the carb called?

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    0 Votes
    4 Posts
    1k Views
    Louis-DT-WRL
    Other name for it is a jet baffle
  • Y

    Oil Questions

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    0 Votes
    40 Posts
    15k Views
    2
    Always used Silkolene Comp 2 which is best oil there is either premix or injector oil.. Ā£38.90 for 4 Litres so Ā£9.72 per Litres https://www.ebay.co.uk/itm/Silkolene-Comp-2-2T-2-Stroke-Motorcycle-Engine-Oil-4-Litres-4L/161276818881?epid=10017008607&hash=item258cd8f5c1:g:NEQAAOSwcwhVP4E0
  • B

    Disconnect oil tank?

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    0 Votes
    9 Posts
    1k Views
    declanD
    @glynn123 they can fail although it is pretty rare I think they have way more positives Iā€™d never disconnect mine I wish all bikes came with an optional oil fed system
  • B

    Few problems with my dt125re

    15
    0 Votes
    15 Posts
    3k Views
    CalumC
    @bradt The system will incur a known internal resistence with itself, known as impedence. This can be measured. It should fall within a tolerable range, as described by the technical specification of the item. Compare your component against this documentation to ensure the item is within tolerance. Chances are, if it is, then the item is not faulty.
  • T

    Power valve issue

    35
    0 Votes
    35 Posts
    8k Views
    CalumC
    @thechompster And ignitech
  • D

    Stuck seized pivot bolt

    15
    0 Votes
    15 Posts
    3k Views
    FusedF
    On my first DT after several days of trying to remove the bolt, I eventually got it to budge by doing a continuous heat cycle on it, and going at it with a club hammer and drift. When you thinks it got to be hot enough by now...give it another couple of minutes with the blow torch.
  • B

    Ypvs cap broken

    2
    0 Votes
    2 Posts
    745 Views
    CalumC
    It'll need ally welding if you have the pieces, otherwise you'll have to get another one.
  • Glynn123G

    DT125 Front brake caliper bracket dimensions?

    4
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    4 Posts
    2k Views
    CalumC
    @glynn123 Only messing mate. Was on here though.
  • olliedtx12sO

    Ypvs barrel removal

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    4 Posts
    1k Views
    Sgt Robuck 5S
    @olliedtx12s If you need to locate any specific parts click on this and I suggest getting a haynes manual Found on here Amazon
  • declanD

    What hearing yall running?

    24
    0 Votes
    24 Posts
    5k Views
    CalumC
    @finnerz89 One day for sure mate...one day.
  • FusedF

    5 wires to 3

    4
    1 Votes
    4 Posts
    1k Views
    FusedF
    Thanks Calum, I'll shelve that idea for now then..
  • declanD

    Does a rich pilot effect riding

    38
    0 Votes
    38 Posts
    7k Views
    Irongamer727I
    @declan šŸ˜‚šŸ˜‚šŸ˜‚
  • Glynn123G

    320mm discs that fit DTX Front hub?

    2
    0 Votes
    2 Posts
    870 Views
    CalumC
    Doubtful, but an adapter shouldn't be too hard to make. Just make sure you centralise the caliper over the disc.
  • declanD

    2 stroke timing ā€œstatorā€

    12
    0 Votes
    12 Posts
    2k Views
    declanD
    @sgt-robuck-5 ahhh very far then
  • declanD

    General a/f adjustment

    3
    0 Votes
    3 Posts
    890 Views
    declanD
    @finnerz89 yes they are
  • declanD

    Carb settings help

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    4 Posts
    1k Views
    declanD
    @oldman well it looked 40 years old and was visually worn out looked well used if I tried to ride the bike to set off Iā€™d have to redline and ride the clutch then soon as I shift out of 2nd the bike would lose all power and come to a stop then would bog and stutter it seems better with the carb on the garden not tested the street yet
  • SpannersS

    3BN CDI

    4
    0 Votes
    4 Posts
    1k Views
    J
    Why not make adaptor/converter loom, between the cdi and the main loom, so you can connect everything up without molesting either part.