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DT125R FORUM

CalumC

Calum

@Calum
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Recent Best Controversial

  • New Bike =) Piaggio Vespa Douglas
    CalumC Calum

    Couldn't resist in adding a few carbon fibre touches here and there....

    I found a very nice Tomas Compitsite flywheel cover and fan shroude combo. As well as a gear selector cover and a spare wheel cover.

    Sadly, the other two items have not arrived yet.

    General Discussion

  • Post derestriction jetting change on a 1998 Dtr de03
    CalumC Calum

    As @HOTSHOT-III has stated, if you're not running a powervalve then this will hinder performance. If your model has restrictions on it still, then this may have been why the powervalve was pinned. Certain CDIs close the powervalve after certain RPMs, limiting the top end potential.

    All of which can be worked around these days with no real dramas.

    Carburetor

  • 1987 DT200R crank seals. Install.
    CalumC Calum

    Yeah it's worth checking that first. I haven't done a set of DT cases for a while, I've never done 200 cases.

    Engine

  • New owner
    CalumC Calum

    Hello,

    What's the mileage on your machine? Depending on how many miles it's done will influence what type of servicing is required. Have you got any history for the bike, do you know what's been done on it in the past?

    @HOTSHOT-III has already given you a wealth of information to get started with, typically these machines are very reliable and dependable, but I always err on the side of caution, if it can be done, then I like to do it.

    Welcome New Owners!

  • 1987 DT200R crank seals. Install.
    CalumC Calum

    Just checking, the crank seals aren't blind on the 200 cases are they?

    https://www.fowlersparts.co.uk/parts/4136407/dt200r-dt200rh-3cj8-1996-010-a/crankcase

    I can't recall whether they can only be insterted with the bearings out. That's certainly the case for the RS engines.

    Engine

  • Sealing crank cases
    CalumC Calum

    The last time I did crank cases on my DTR I used Yamabond and used a thin paint brush to apply it.

    Engine

  • Dt125 engine igniton tuning options?
    CalumC Calum

    Oh interesting. Seems like its a collaboration with Italkit.

    No good for a road going machine. You won't be able to run any lights etc. I'd recommend grabbing a lithium battery to go alongside this.

    I don't think the ignition timing is reprogrammable and it has a fixed static angle. So it terms of flexibility, from the limited information I read, it seems very limited.

    Great for race applications where you are basically open or closed throttle, but I'd steer clear for road use.

    Ignitech or Zeeltronic ignition systems for the win for a road going setup.

    DTR dt125 tdr125 swap ignition tuning

  • Dt 230 Lanza top end
    CalumC Calum

    Yeah, I've always had my eye on an Lanza 230. Once upon a time you could pick them up dirty cheap! But the price of them now, I can't justify it and I just think there are other bikes I'd rather own.

    Sticking with the Yamaha family, I'm now fully invested into RD350s. I've sort of always been around Aprilia in some shape or form, but I think if I'd to get another supermotor or trail bike, it'll be an EXC300 TPI.

    That's if the electric bikes don't suddenly take off 🙂

    Top End

  • Is engine braking still bad for the engine with oil injection?
    CalumC Calum

    Typically what are you gaining on a two stroke with engine braking... It's not like a four stroke.

    When down shifting I always blip the throttle, to both rev match and maybe give it a squirt of oil.

    I certainly wouldn't be going down a big hill engine braking the whole way at high rpm on a two stroke. Nice blips on the throttle and a high gear to keep the RPMs down.

    When it comes to competition bikes, well reliability is all out the question and if engine braking does even a fraction of slowing down then it's worth it, but for road going use I only engine brake in an emergency.

    Engine

  • Dt 230 Lanza top end
    CalumC Calum

    I don't think Lanza parts are particularly cheap these days, so the MXE is probably the cheaper bet to be fair.

    Top End

  • Dtr 2001 hose warming pipes
    CalumC Calum

    The original Mikuni had two feeds on either side that you connect via the cylinder head.

    I've never bothered in 15+ years of DTR ownership.

    Carburetor

  • Is zeeltronic still going
    CalumC Calum

    My last one I bought I must have waited so long that the engine packed up before I really got to use it. I have one fitted to my ETX but I got that from PJME I believe and they had that on the shelf.

    When my Yamaha CDI went faulty I sent it back to Borut directly and that was a few week turnaround I remember.

    Electrics

  • Zeeltronic let down
    CalumC Calum

    I've not bought from them directly, normally through 'The Tuning Works' or Yamaha Spa Cheltenham or Jap4Performance. I'll be getting my next one from 'Mad Bike Designers'.

    They're not based in the UK, so if you're purchasing from them directly then I imagine logistics and Brexit imports take time.

    Not on though that they haven't gotten back to you, should have plain sailing communications that's a basic necessity!

    Electrics

  • Is zeeltronic still going
    CalumC Calum

    Yeah, for me (DTRE) the Zeel was the single biggest performance increase. Mid range was greatly improved.

    Electrics

  • Is zeeltronic still going
    CalumC Calum

    Borut used to be very good at responding to queries. I guess they could have got big enough that responding directly has become too burdensome. What is it you were looking to talk about. Can you not get in contact with a reseller?

    Electrics

  • WTF??? hole on bottom on engine
    CalumC Calum

    @HOTSHOT-III Wasn't it just a crankcase breather from air pressure build up

    Engine

  • WTF??? hole on bottom on engine
    CalumC Calum

    The hole is normal.

    Engine

  • So Close!...
    CalumC Calum

    Use Yamabond to seal the crankcase halves.

    https://www.ebay.co.uk/itm/283564713529?chn=ps&_ul=GB&google_free_listing_action=view_item

    DTR

  • tzr belgrada exhaust
    CalumC Calum

    Like that bud

    Exhaust

  • Bike seems to leak coolant from kickstand ??
    CalumC Calum

    Why would it be the waterpump? That's on the other side of the engine/bike. It's no where near the stand?

    Do you mean you think it's getting hot and overflowing because the waterpump doesn't work???

    Engine
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