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  • The Hermes Project (Cagiva Raptor 125)

    Other
    27
    0 Votes
    27 Posts
    2k Views
    ZKJE101Z

    @Calum no worries mate. I would take a cad file if you wouldn’t mind sharing 🙂 will likely send them off to a local machinist. I have a 3d printer as well so could try the cad file on there!

  • Cooling issue

    Engine
    5
    0 Votes
    5 Posts
    18 Views
    K

    Thanks bud will have a look later yeah I went out for my first time last night but was small trail where you couldn't go fast at as a couple technical bits probably was not the best place to start for my first time my mate breezed around it on his trials bike lol cheers lads for the info I'll let you know how I get on

  • Dt 125 x sm Front fork needed

    Suspension
    3
    0 Votes
    3 Posts
    18 Views
    M

    Hi spook need the right fork as i snapped the axel bracket when changing the front tyre getting it ready for its mot

  • Exhaust bolt snapped

    Exhaust
    3
    0 Votes
    3 Posts
    12 Views
    K

    Good morning pal thank you so much the thread on the engine was fine brought a tap and die set and fixed the bolt and it's back o there was In full panic mode how would I go about bolting it on to the engine as at the moment I have one bolt on it and I use that through the exhaust to the engine to bolt it on but the other one you just undo the nut and the bolt stays in the engine how ever the other one the Bolt comes out of the engine sorry if it does not make sense my English is not the best

  • Reason for the stock air box ?

    Engine
    2
    0 Votes
    2 Posts
    15 Views
    HOTSHOT IIIH

    @mbmO8 This explains the YEIS box between the carb and reed valve better than I can:

    https://global.yamaha-motor.com/stories/history/stories/0019.html

    When working around that area it's not that difficult to remove as long as you have a decent pair of pliers to squeeze the clip on top of the reed block, just stuff a rag in the hole until you refit it. The one behind the carb on later bikes, I've never owned a DTR with one of these fitted so maybe someone else can help out explaining this? I see a lot of people blank these off with the lid off a Coke bottle.

  • Vin Numbers (frame & engine)

    DTR
    10
    0 Votes
    10 Posts
    1k Views
    C

    Hi all. is there any way to find out my engine year as it says 3py-001. at 1st can't find anywhere to check engine numbers and make of it.

  • Correct cable and wiring routing advice required

    Framework
    7
    0 Votes
    7 Posts
    38 Views
    CalumC

    Cheers @HOTSHOT-III

  • DT125RE 2006 Wiring Harness

    Electrics
    1
    0 Votes
    1 Posts
    30 Views
    No one has replied
  • Stuttering after full engine rebuild

    DTR
    9
    0 Votes
    9 Posts
    178 Views
    D

    Whoa.
    Yes, it's a good thing we didn't ordered the wrong parts for my bike.

    So you're saying i should check the carb?

  • power valve activation

    Electrics
    2
    0 Votes
    2 Posts
    39 Views
    MadGyverM

    If the cabling is not messed up the main light runs directly from the stator, doesn't load the battery.

  • LED headlight conversion

    Electrics
    4
    0 Votes
    4 Posts
    51 Views
    HOTSHOT IIIH

    @mbmO8 Nice to hear bud, enjoy 👍

  • Question about expansion chamber

    Derestricting
    6
    0 Votes
    6 Posts
    137 Views
    HOTSHOT IIIH

    @Hark_Ptooie I found with the Tecno expansion chamber (basically identical to the Athena) it fitted a lot easier using the genuine Yamaha rubber grommet and spacer on the upper mount. The ID of the spacer is quite large and allows a little more movement to line it up than the grommet/spacer supplied..

  • quick question about wheels

    DTR
    2
    0 Votes
    2 Posts
    51 Views
    CalumC

    I am led to believe that the WR125X wheels are Saxxes wheels, not Excel like they were on the DTX.

    That said, I thought they do fit, but you need the DTX setup etc, so the front brake, forks and spacers.

    It's not a direct swap for the DTR setup, but it is a very simple swap.

  • simple tail tidy?

    Electrics
    6
    0 Votes
    6 Posts
    64 Views
    CalumC

    if you buy a tail tidy online and fit it it will probably look good and work well but equally it can be very rewarding to sit down and design/make something that improves your bike and is unique.

    @HOTSHOT-III That's where I spend most of my time these days. I can't remember the last time I rode my Yamaha, but I'm working on it most weekend 😛

  • Hi, new here, need some help

    Welcome New Owners!
    4
    0 Votes
    4 Posts
    70 Views
    CalumC

    6Nm rings a bell 🤣 Haynes is invaluable.

  • DT 125 4BL Jetting Confusion

    Engine
    2
    0 Votes
    2 Posts
    37 Views
    HOTSHOT IIIH

    @dominik22 I'd start by refitting the airbox snorkel and the stock silencer if you have one. My French '93 4BL ran very well running the jet sizes you mentioned (i.e 240 main) with either a full stock exhaust system or a Tecno expansion/DEP silencer combo but it didn't like the stock expansion/aftermarket silencer combination.

    Sometimes the tailpipe can affect performance as the stock expansion chamber and silencer are designed to work together; if you change one it can alter back pressure and mess with the pressure waves going backwards and forwards. These evacuate exhaust gases from the cylinder, assist in drawing fresh mixture up through the transfer ports and act to keep the fresh charge from escaping straight out the exhaust port. I never thought the tailpipe alone would affect this but once I tried a brand new DEP silencer on my otherwise stock French '93 4BL with 3NC CDI; it immediately refused to rev beyond 9k. I rode it around for about an hour to eliminate wind direction etc., came home and refitted the stock silencer and straight away it revved to 10k+ again. This is only personal experience, I don't have access to a dyno or anything but it made a big impression on me. A Tecno expansion chamber would probably work well with that Athena silencer.

    Tecno expansion is identical to the Athena apart from the clearcoat and under half the price. Only downside is the clearcoat melts around the header pipe and is difficult to sand off making your bike look like a Crème Brûlée. If I bought another one now I'd paintstripper it and paint it heatproof black before fitting it. Very good quality pipe for the money, gives a more usable mid-range hit than the DEP which delivers peak HP revs about 600rpm later.

    https://www.ebay.co.uk/itm/253780922884?gclid=Cj0KCQjwurS3BhCGARIsADdUH5215jUowscJtBepB7NQYPYfR4AeBV1Gu63S4cHFVVEN8aPRotYawA4aAoc7EALw_wcB&_ul=GB&mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5339059258&toolid=10044&customid=Cj0KCQjwurS3BhCGARIsADdUH5215jUowscJtBepB7NQYPYfR4AeBV1Gu63S4cHFVVEN8aPRotYawA4aAoc7EALw_wcB

  • DT125re front brake master cylinder

    Brakes
    2
    0 Votes
    2 Posts
    29 Views
    HOTSHOT IIIH

    @Koltin As far as I know all pre-DTRE master cylinders are the same from 1988 until around 2004 so I'd start by comparing part numbers on Fowlers website, look up the part for say an '88, a '96 and your own bike:

    https://www.fowlersparts.co.uk/?gad_source=1&gclid=CjwKCAjwl6-3BhBWEiwApN6_ks8FnxkMK8pUTlwAmDTt4wZ4GV5FlSqAj_zeubTOZF-qK69xd1CwVxoCpO4QAvD_BwE

  • Dt 125r dyno

    Engine
    96
    0 Votes
    96 Posts
    7k Views
    A

    Power on this run was 16.98 bhp.
    On other runs it was 17.58. Without any mods.

  • main jet too small

    Carburetor
    2
    0 Votes
    2 Posts
    26 Views
    MadGyverM

    Maybe it's from the 3ET DT200R,has the same carb as the DT125R but uses different numbering in jets, the main is 150 but is not smaller than the 210 of the DT125R.

  • Fuel consumtion

    Engine
    5
    0 Votes
    5 Posts
    88 Views
    Hark_PtooieH

    I hoon around town on an unrestricted DTR and it uses less than 5 L/100 km.