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Technical Zone

1.3k Topics 11.5k Posts

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  • Suspension Related

    101 769
    101 Topics
    769 Posts
    C
    Hi all, I'm struggling to find the bearing which attach to the linkage to the swing arm? Have located and purchased the main swing arm bearings. Can anyone guide me in the right direction please, my swing arm looks similar to this one https://ebay.io/m/t3DzTV

  • Exhaust Related

    66 581
    66 Topics
    581 Posts
    CalumC
    I can't say I am very familiar with thise pipes sadly. I have been away from the tuning scene for these bikes for many years now. It's been years since I've even ridden my DT to be fair.

  • Framework Related

    87 609
    87 Topics
    609 Posts
    C
    Hi, thanks for the help it's a 1998, the one I have goes into the intake boot with a peice of tube which I would guess and say is around 250mm in length then the chamber sat on top. Will get some photos tonight

  • 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

    269 2k
    269 Topics
    2k Posts
    K
    I meant the wiring for the bulbs. Thank you for the picture, the problem was that the diagram I found showed that the brown wires aren't supposed to be connected (brown from the thermometer, oil bulb, neutral bulb), mine showed that the thermometer needed to be connected to the oil bulb and that the neutral bulb brown needed to go straight into the 6pin connector, without connecting to the oil bulb or the neutral bulb. I didn't understand that but the diagram you sent made everything completely clear, thank you!

  • Brake Related

    70 459
    70 Topics
    459 Posts
    CalumC
    Do you mean dual piston caliper? Or do you want two calipers 馃き 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

    552 5k
    552 Topics
    5k Posts
    P
    @Carl-Kennedy hello, I had the same problem. Found out that someone ripped out the mechanical gears out of it, you can try that. And if you happenned to have them, could you please tell me the dimentions of the gears? Thanks
  • declanD

    How do you break in your fresh re bores

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    0 Votes
    14 Posts
    3k Views
    declanD
    @Calum figured so thanks
  • declanD

    Un used crank nipple???

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    5 Posts
    2k Views
    declanD
    @castrolsniffer will do now I know what it is thanks.
  • D

    Yamaha dt re 125 2006 no power to servo

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    2 Posts
    1k Views
    Louis-DT-WRL
    Have you earthed the powervalve?
  • CallumJ94C

    YPVS Servo Problem

    4
    0 Votes
    4 Posts
    2k Views
    Louis-DT-WRL
    Try swapping a cdi from the other bike to rule out its the cdi
  • G

    Twin rad

    21
    0 Votes
    21 Posts
    7k Views
    CalumC
    @CYBER-NINJA An ally rad would make a huge difference. The Lanza rad, like the DT200R Rad, has a tiny capacity. I'm sure it ran very hot. But then the DT never had a digital temperature gauge to compare it to. The RE's Simply have a light that goes on when the engine is too hot.
  • G

    Rear coolant bottle

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    6 Posts
    2k Views
    G
    Awesome thanks @Calum
  • B

    Health Check

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    28 Posts
    9k Views
    F
    Most 4 stroke bikes use the same oil for engine and gearbox, so any bike oil will be fine. But car oil is a no no as it has additives in that will make the clutch slip.
  • D

    Seized Engine after rebuild...

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    7 Posts
    3k Views
    CalumC
    @Darty I am not convinced a bit of water would have seized tge engine. Any good engine builder liberally coata a freshly built engine with lots of oil. Although now I think about it. If the leak was at the bottom gasket, and was severe. Then haven't you juat hydrolocked the engine? Clearly it neess investigating so until you split the cases you won't truly know the extent of the damage.
  • 8

    Need a speedo drive

    6
    0 Votes
    6 Posts
    2k Views
    tunertomT
    https://www.ajsutton.co.uk/product/yamaha/3XP251900000/gear-unit-assy?uid=0 go here... go to the tab that says fitment, it shows the part number and all the same bikes that use the same speedo as the DT.
  • Uber_BelugaU

    Chain and sprockets

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    0 Votes
    12 Posts
    9k Views
    Uber_BelugaU
    Alright, that's a no to the higher pitch in that case. Doesn't look like I'm going to get any of this stuff before the weekend now. I have a whole heap of new stuff that I'm dying to get on the bike, so the drivetrain stuff is going to have to wait I think. If I can get the bike running this weekend I'll place an order for one of those anodised renthal rear sprockets, a 428 chain and a standard front sprocket. I'll probably come back and ask about chains then. Here's hoping I can get a spark this weekend.
  • MiniaM

    In need of speedos for DT125R

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    16 Posts
    8k Views
    CalumC
    @CYBER-NINJA I was going to say bet they weren't cheap. They look mint though.
  • M

    DT125R SM suddenly cut out,Now wont start.Powevalve has stopped cleaning cycle

    8
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    8 Posts
    3k Views
    CalumC
    @MattD thatis fine it will do that.t
  • Uber_BelugaU

    Difficult start

    25
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    25 Posts
    21k Views
    R
    @Uber_Beluga So if you have four wires - one will be an ign. Switched live to the starter switch. One will be the return wire to the starter solenoid. Then the other two will be a feed up from the CDI and a return that either goes back to the CDI to make a circuit or maybe goes to earth as I mentioned before. Just buzz the wires out with your meter to check what they do, but if you can get a good make/break across the switch then that's not you problem.
  • Uber_BelugaU

    Good mechanic for DT or 2 strokes in general

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    21 Posts
    10k Views
    CalumC
    @Uber_Beluga Alright mate, well feel free to PM me any time. And as always, if you fancy doing it yourself, throw up a thread if you need help. Either myself or someone will be around to fire some answers.
  • vtrtomukV

    Renamed, Head Gasket Leak, Solved

    35
    0 Votes
    35 Posts
    28k Views
    CalumC
    Clutch needs to be balanced properly if it's dismantled. But But noise is generic. Is it metal on metal sound?
  • D

    Best modification and why?

    7
    0 Votes
    7 Posts
    4k Views
    CalumC
    @DevonDtr Even I don't do those hours! Still 拢50 better off in your pockets. But if you are happy to pay then by all means.
  • Leftyno1L

    Bike will start but not Tick over ?

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    24 Posts
    20k Views
    CalumC
    @Leftyno1 yeah nice one man. Yes and no. Of course when the clutch wears significantly it will slip. But it will not disengaged before it slips so theres that. What I mean is when the clutch is on ots way out. With the clutch lever pulled in the clutch with not disengage and still pass power to the wheels. You them adjust it to its max setting on yhe lever, perch and clutch drum. If that still fails then new plates amd springs. But I mean you would need serious mileage before that happens. By which time you will do a full engine rebuild and why you wouldn't build yhe clutxh at that stage is madness.