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Technical Zone

1.3k Topics 11.4k Posts
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  • Suspension Related
    100 766
    100 Topics
    766 Posts
    YzDt85Y
    I found out that the shorter rear axle collar(part numper 90387-202U8) is the same on the Wr200 and Dt. If anyone has that longer collar(part numper 90387-206X8), could you measure its length? And if anyone has a wr200 rear axle, could you measure its length? The rear axle part numbers of the Wr and Dt are almost the same WR axle part numper 3XP-25381-00 DT axle part numper 3BN-25381-00

  • 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
    82 743
    82 Topics
    743 Posts
    C
    Well it looks like I have found the issue... somewhere along the line someone has pikey bodged the front axle and spacers... What should have had the sleeve spacer which has the 1mm wall which slides in to the 17mm ID bearing was clearly lost and someone had inserted a 40mm x 15mm bearing and used a spacer from an older DT in place of the correct one.. The joys of owning an unknown modified bike! So I am now getting a spacer machined up and I should be good to go! It has only been holding me up since before christmas.. so now I can get the wheels fitted, get the bike back to mine and do the final few bits before MOT.. starting to get excited now Picture of the spacer that I should have had below: [image: 1773302928622-spacer.jpg] Versus the spacer that someone had installed and was somehow using.. [image: 1773303198579-shaft.jpg]

  • Electric Related
    258 2k
    258 Topics
    2k Posts
    HOTSHOT IIIH
    @Kristóf said in POS mode on switch: So does this mean that with the main switch to ON and the lights switch to POS it should light up the auxiliary light even with the engine off? No, lights switch to POS with the main switch to ON only illuminates the auxiliary light/tail light with the engine running because with the switches in these positions, the auxiliary and tail light receive an AC feed from the stator via the yellow/red wire. @Kristóf said in POS mode on switch: I'm asking this because my auxiliary light works when the main switch is to PARK but it doesn't work with the lights switch to POS Yes, this is because with the main switch in the PARK position, the auxiliary and tail lights receive a DC feed directly from the battery via the red wire (which connects to blue/red at the main switch in PARK). It took me a long time to fully understand this so glad I'm able to explain it properly!

  • Brake Related
    68 453
    68 Topics
    453 Posts
    CalumC
    Yeah that sounds like a good idea and should be easy to swap the wheels over without too much faff!

  • Engine Related
    541 5k
    541 Topics
    5k Posts
    CalumC
    Not familiar with a 1994 DT175 (I presume this is from the Asia (Far East) market). The oil light will just be for the two stroke. There are no sensors that do gearbox, the most you get is a Neutral Light sensor (if you're lucky). For the gearbox oil, the only sensors you see are with your eye balls and the oil sight glass. I can't 100% say this is the case, but I say it with high confidence that this will be the case. Hopefully that's useful. Calum
  • C

    DT125 R(4BL) Parts no longer available (new)

    1
    0 Votes
    1 Posts
    908 Views
    No one has replied
  • G

    Tacho reading 1500 when engine not running

    3
    0 Votes
    3 Posts
    694 Views
    G
    Hi, okay, thanks @declan - may try and get it open , knowing there will be a backup plan!
  • B

    Dt 125re No power.

    4
    0 Votes
    4 Posts
    735 Views
    declanD
    @Baileyboy2008 well like Calum pointed out there’s no such thing as pinning your valve half way if the valve is have way closed you will get zero power above 6k open her all the way and then see what it does
  • DartyD

    The Library

    dt125r dt200wr wr200
    5
    5 Votes
    5 Posts
    1k Views
    NottsbikerN
    Yes very rare now and you have to hunt high and low to find anything at sensible prices I'm afraid
  • D

    Dtr 125 pressurizing problem!

    9
    0 Votes
    9 Posts
    1k Views
    CalumC
    Pressure Cap! I wouldn't believe it but I have seen it a few times. Always start off with something cheap and look at the more expensive items later.
  • Ryan FR

    Bike lacks power

    27
    0 Votes
    27 Posts
    4k Views
    CalumC
    @Oisin You tried searching? https://dt125r.co.uk/topic/578/derestricting-guide
  • B

    Still no spark on my DT125RE

    9
    0 Votes
    9 Posts
    1k Views
    CalumC
    Measure across the pick up sensor. Make sure that you are getting current to trigger the CDI. You will want to follow that pulse from the pickup to the CDI. From the CDI you will see it go to the primary coil. From there it should go to the secondary mutal winding and out to the HT lead. It's as simple as that. Somewhere you are losing that signal.
  • riley_racerR

    Stickers/Decals

    14
    0 Votes
    14 Posts
    2k Views
    riley_racerR
    @oldman just had a quick search, looks ideal, cheers mate
  • V

    Why does it do this?

    7
    0 Votes
    7 Posts
    987 Views
    V
    @markus-w thanks
  • V

    Should theese jets fit my yamaha dt 125 x 2006 witk mikuni tm28-92 carb (stock carb)

    1
    0 Votes
    1 Posts
    484 Views
    No one has replied
  • J

    Dt125re 2004 servo

    servo
    11
    0 Votes
    11 Posts
    1k Views
    C
    so @Jgb19830 did you fixed it,just by that? i have the same problem.
  • 2

    This sounds like bottom end bearings right?

    4
    0 Votes
    4 Posts
    620 Views
    CalumC
    Well you should have checked the bearings at the same time. For up or down play.
  • W

    HID headlight conversion

    6
    0 Votes
    6 Posts
    840 Views
    NINJAN
    @ward4014 Just fit some brighter bulbs for a super easy and cheap upgrade; https://www.ebay.co.uk/itm/2-x-H5-P45t-Birnen-Halogen-Auto-Lampen-6000K-60-55W-Xenon-Weis-12V/362660604593?hash=item547041aab1:g:GEkAAOSw~dJdNZD9
  • W

    New piston but no rebore

    4
    0 Votes
    4 Posts
    840 Views
    W
    Thanks guys I'll take it to the shop once I have it off I'm only changing the piston because I have never changed it it rides mint but just peace of mind
  • W

    How does the oil get into the gearbox side of the engine

    5
    0 Votes
    5 Posts
    769 Views
    W
    @Calum I have had the clutch cover off everything looks good tbh
  • W

    Reset milage to 0

    4
    0 Votes
    4 Posts
    701 Views
    CalumC
    My aftermarket clocks reset to zero. Now my mot history is all over the place. I don't intend on selling the bike so makes no odds to me. Would be nice to see how many miles I have done in ten years though.
  • P

    General maintenance

    7
    0 Votes
    7 Posts
    1k Views
    CalumC
    @panmil92 I don't recall there being any certain type of weak point. Fairly bullet proof motors. It's just general items. Bearings, bushes and seals.
  • J

    Piston play

    2
    0 Votes
    2 Posts
    533 Views
    J
    https://youtu.be/p5XOQFRJzko Here it is running... Story is it overheated on a ride out due to an airlock in the cooling system. So the piston went pop
  • S

    2007 dt re blue frame colour code??

    3
    1 Votes
    3 Posts
    859 Views
    declanD
    @Minia I believe it’s on the frame tube under the rear of the mudguard
  • D

    reeds confusion ??

    5
    0 Votes
    5 Posts
    833 Views
    D
    @Calum said in reeds confusion ??: @Dingle74 I'm sure there is information on here about what can be used. Try using the search bar.. good pointe with the searchthing , but the searchfunction is not my new freind :crazy_face: when searching for reeds i get everything from pics of cracked seat to chain and wheel-questions :face_with_hand_over_mouth: so have just skimmed over lightly there was one post though sayin that wr dont fit and poster wanted to show a pic of the difference but sadly it didnt work for him