Skip to content
Brand Logo

DT125R FORUM
  1. Home
  2. General Discussion

General Discussion

A place to talk about whatever you want
609 Topics 6.0k Posts

Subcategories

  • Please Introduce Yourself Here Before Posting!
    179 2k
    179 Topics
    2k Posts
    CalumC
    Here are the differences in the 3BN Cylinder head [image: 1483566896896-dt125rheads-diffrences.jpg] It'll be marked on the cylinder head. [image: 1663628447669-874e98a1-e604-4e06-9310-d20f77cae655-image.png] The 3BN head is interoparable with the 3MB head, but has a combustion ring which is said to adversely affect performance. Here is a video of the difference between a 4FU cylinder and a Belgarda 3MB00P cylinder. https://www.youtube.com/watch?v=P8okvTxe-Bs Here is a 3MB cylinder. [image: cylinder-1_medium3MB1131100-02_4baa.jpg] [image: 1663628477295-8e899a28-4514-4881-89ec-bfcc824ade10-image.png] You'll see the crankcases are stamped 3BN [image: 1663628512647-b054f520-0af7-4920-948f-cc532b8bbd25-image.png] For the most part you don't need to worry about it, it'll be rare that you'll find a DTR with a 3BN crank/cylinder and most of them will be 3MB cylinders. But it's just worth bearing in mind. There are variations in CDIs and Exhausts which affect the performance, but these are less important as there are aftermarket support that recitfies any loss in performance

  • This section is for members to talk about anything non-dt related. Please keep the theme and language clean to permit viewing in work.
    193 2k
    193 Topics
    2k Posts
    CalumC
    Normally, they just add a throttle stop to restrict the bike, so you can only open it 3/4s of the way. This is what a lot of the test centers do as it's easy then to unlock the bike to full power afterwards.

  • Post your jokes & funny things you find on the web in here.
    16 118
    16 Topics
    118 Posts
    HOTSHOT IIIH
    @Stevie-Wonder Thanks bud Greta (for that is her name as she's noisy, irritating, aimed squarely at the youth market and responsible for thousands of them bunking off school all over the world) cost me half as much as my '93 due to the mileage and had a thick layer of grime all over due to years of grinding commuting. I gave her a scrub with Jizer (several times) and this is what was underneath Here are the part #s for the toolbox and lid, bit pricey IMO and you'd have to get the lugs welded on to a non-e start frame. Be a nice touch if you were getting it powdercoated sometime though https://www.cmsnl.com/products/boxtool_55v2817301/ https://www.cmsnl.com/products/lid_55v2818500/

  • Blog posts from individual members
    15 138
    15 Topics
    138 Posts
    NINJAN
    @Minia Looks nice and beefy and she sounds cool with a deep roar!!! :grinning_face_with_smiling_eyes: :face_with_stuck-out_tongue_winking_eye: :thumbs_up_light_skin_tone:

  • Content Not Suitable for Work!
    0 0
    0 Topics
    0 Posts
    No new posts.
  • RandallR

    Bike died load bang have compression but won't start

    18
    0 Votes
    18 Posts
    1k Views
    NINJAN
    @jamesrandall93 Get a Haynes manual dude, there worth their weight in gold!!!
  • ringo67R

    kmx or DT

    4
    0 Votes
    4 Posts
    787 Views
    BluestoesonnoseB
    KMX 125 local to me (East Cornwall) £1200
  • RandallR

    Sinnis apache usd conversion?

    7
    0 Votes
    7 Posts
    615 Views
    stinkwheelerS
    My freind had a sinnis apache and after about 2 years the seals gave up and they were pitted like mad on the forks and they are terrible.... just buy some decent ones off of a mx bike such as the yz .... anything else would be pointless as its not really an upgrade for the effort you will need to put in fabricating parts ...
  • Louis-DT-WRL

    Tse250r have a look Lanza copy engine

    11
    0 Votes
    11 Posts
    861 Views
    CalumC
    @Glynn123 Quads are deadly mate. Deadly. @Louis-James Are we really considering a Chinese Engine for our Japanese bikes? Just get a Lanza engine, they crop up from time to time.
  • BluestoesonnoseB

    Potentially Selling

    1
    0 Votes
    1 Posts
    218 Views
    No one has replied
  • declanD

    2 stroke dB killers

    15
    0 Votes
    15 Posts
    2k Views
    NINJAN
    @declan MMMMMMMMMMMMMMMMMMMMM OK
  • C

    Weird Oil change issue. HELP!

    11
    0 Votes
    11 Posts
    827 Views
    NINJAN
    @dan28 AAAHHHH good ole Wilko to the rescue. :thumbs_up_medium-light_skin_tone:
  • B

    Bye bye dtr

    11
    0 Votes
    11 Posts
    985 Views
    declanD
    @Glynn123 the ride home will always be nicer lol
  • S

    Importing from France etc.

    7
    4 Votes
    7 Posts
    2k Views
    NottsbikerN
    Lol are you near Nottingham?
  • R

    This topic is deleted!

    1
    0 Votes
    1 Posts
    59 Views
    No one has replied
  • B

    Dt125re value ?

    22
    0 Votes
    22 Posts
    4k Views
    B
    @NINJA i know he definitely cheered my week up I can remember them days tho the excitement I’m just a little concerned he’s never rode a geared bike and he stepping up from a 50cc moped. The bike gunna get trashed within the week
  • B

    What is a engine worth?

    2
    0 Votes
    2 Posts
    366 Views
    CalumC
    £200, but be sure to rebuild it regardless of what the seller tells you. Obviously the cheaper you can get it the better.
  • RandallR

    Dep full system swith dt125r 2001

    2
    0 Votes
    2 Posts
    411 Views
    stinkwheelerS
    @jamesrandall93 ..... temperature rising quickly? Eerrm it should rise quickly up to normal operating temperature .... you mean in to the red ? ..... im guessing before you posted this you checked the water level ect ? ...... a more detailed description will help us provide you with a better reply
  • gilesG

    Dtr 125 1990

    10
    0 Votes
    10 Posts
    856 Views
    stinkwheelerS
    @giles the mixture screw is the smallest one sat in the hole in an angle on the side ...... the bigger one with the adjuster on it is the tickover screw .... hope this helps
  • CalumC

    Registering a European Motorcycle UK

    23
    0 Votes
    23 Posts
    3k Views
    jimmydc98J
    On this website they do insurance on vin and it says you can get drive to a pre arranged mot https://ajinsurance.co.uk/personal-insurance/car-insurance/chassis-number-unregistered
  • Yamboy46Y

    the no log book chestnut

    9
    0 Votes
    9 Posts
    2k Views
    D
    The last NOVAs I did, HMRC didn't pass it. They emailed 2 days later requesting a receipt from the previous owner abroad and proof of its age. Of all the stigma people try and attach to the simple process of registering a legit imported bike with papers there are some genuine hurdles that nobody seems to know about. To clear it up, for an EU Bike over 10 years old with or without papers you need: Nova applied for online and a receipt and proof of age, either foreign logbook or dating certificate at the ready incase they email you. MOT V55/5 filled in and sent with the dating certificate if you didn't have logbook. Also, I've not heard this being done with an EU bike but a non-EU bike can be valued in writing at a dealer if you don't have a receipt. (Non EU bikes held by private buyers need to fill in the C384 form and email it to Belfast) For private owners it's worth joining the VJMC for various discounts and get the dating certificate for £25, but they seem to do pre 98 bikes only. There are people on Facebook who can get a UK reg number for a smallish fee from the frame number of a UK bike.
  • N

    This topic is deleted!

    1
    0 Votes
    1 Posts
    8 Views
    No one has replied
  • RandallR

    Fmf end can / full pipe dt125r 2001

    2
    0 Votes
    2 Posts
    384 Views
    declanD
    @jamesrandall93 I’m pretty sure it’s the wr200 system not a direct fit if I reacall correct but close enough there’s threads on here so search them up
  • B

    Do I let my beloved DT go?

    8
    0 Votes
    8 Posts
    1k Views
    CalumC
    @bikemad88 Because only members with sufficient posts and privileges can post on this site. You must have more than 50 posts I believe. As Scrim says, you can't compare the KDM and KMX as they're two completely different bikes. Also look at the wr200 as that'll be a solid bike. Again light nimble with a enough poke for them lanes.
  • M

    Advice buying a 2006 DT125R

    6
    1 Votes
    6 Posts
    732 Views
    B
    When a 2 stroke is left to stand for a while the carb will be gummed up. As someone mentioned, oil change, new 2T oil, new filter, plug and change coolant. Make sure all old petrol is drained and new is put back in. Ride is slow for a 10mins using brakes and clutch etc to break them in again, once your happy all is ok, take it for a good blast, get all tha shit out the exhaust. If it's abit doggy on accelerating, a full carb clean is required. Good luck