Skip to content
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (Slate)
  • No Skin
Collapse
Brand Logo

DT125R FORUM

  1. Home
  2. Technical Zone
  3. Engine
  4. The wr200 3xp / dt125r 3bn hybrid 200cc engine no.2

The wr200 3xp / dt125r 3bn hybrid 200cc engine no.2

Scheduled Pinned Locked Moved Engine
43 Posts 10 Posters 7.5k Views 2 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • MiniaM Offline
    MiniaM Offline
    Minia
    wrote on last edited by
    #12

    Looking good! Then again everything you do looks outstanding to me.

    Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015

    Louis-DT-WRL 1 Reply Last reply
    1
    • MiniaM Minia

      Looking good! Then again everything you do looks outstanding to me.

      Louis-DT-WRL Offline
      Louis-DT-WRL Offline
      Louis-DT-WR
      wrote on last edited by
      #13

      @Minia thanks man. I like to do my best 😉

      1 Reply Last reply
      0
      • Louis-DT-WRL Offline
        Louis-DT-WRL Offline
        Louis-DT-WR
        wrote on last edited by
        #14

        alt text
        alt text
        New powervalver but not genuine from Greece.

        alt text
        alt text

        NINJAN 1 Reply Last reply
        1
        • Louis-DT-WRL Louis-DT-WR

          alt text
          alt text
          New powervalver but not genuine from Greece.

          alt text
          alt text

          NINJAN Offline
          NINJAN Offline
          NINJA
          wrote on last edited by
          #15

          @Louis-James If it's not genuine then what are the Yammy packets for??? :confused_face:

          SEDUCED BY THE DARK SIDE!!!

          Louis-DT-WRL 1 Reply Last reply
          0
          • NINJAN NINJA

            @Louis-James If it's not genuine then what are the Yammy packets for??? :confused_face:

            Louis-DT-WRL Offline
            Louis-DT-WRL Offline
            Louis-DT-WR
            wrote on last edited by
            #16

            @NINJA the powervalve is a reproduction. I have lots of brand new genuine parts that came from fowlers

            1 Reply Last reply
            0
            • Louis-DT-WRL Offline
              Louis-DT-WRL Offline
              Louis-DT-WR
              wrote on last edited by
              #17

              What is this? I've not seen it before from memory clips inside the splined washer .

              alt text

              alt text

              1 Reply Last reply
              0
              • Louis-DT-WRL Offline
                Louis-DT-WRL Offline
                Louis-DT-WR
                wrote on last edited by
                #18

                alt text
                alt text
                alt text

                Cases bored out for the larger crankshaft

                alt text
                alt text
                alt text
                alt text

                NINJAN 1 Reply Last reply
                2
                • Louis-DT-WRL Louis-DT-WR

                  alt text
                  alt text
                  alt text

                  Cases bored out for the larger crankshaft

                  alt text
                  alt text
                  alt text
                  alt text

                  NINJAN Offline
                  NINJAN Offline
                  NINJA
                  wrote on last edited by
                  #19

                  @Louis-James Sweet looking job dude. :clapping_hands:

                  SEDUCED BY THE DARK SIDE!!!

                  1 Reply Last reply
                  0
                  • CalumC Online
                    CalumC Online
                    Calum
                    wrote on last edited by
                    #20

                    WOw, that looks superb!

                    Always Originate, Never Pirate!

                    Louis-DT-WRL 1 Reply Last reply
                    0
                    • CalumC Calum

                      WOw, that looks superb!

                      Louis-DT-WRL Offline
                      Louis-DT-WRL Offline
                      Louis-DT-WR
                      wrote on last edited by
                      #21

                      @Calum @NINJA cheers lads. When you're rebuilding an engine that the previous owner "rebuilt" themselves you soon realise how many parts were missing, damaged or incorrect. Any help with the clutch washer ? Still need to do 1 more fowlers order. Pistons on its way 🙂

                      1 Reply Last reply
                      0
                      • 2 Offline
                        2 Offline
                        2stroketerry
                        wrote on last edited by
                        #22

                        @Louis-James Great little engine your building and like seeing quality work that you do. When i put a 57mm stroke crank in mine didn't fit the washer under the PRIMARY DRIVE GEAR NUT so the so the nut had the maximum amount of threads to screw onto.

                        0_1537452840393_nut.jpg

                        The tabbed washer inside the splined washer is used to set the mainshaft endfloat on the clutch on some yamaha engines as they mix and match some gears inside the crankcase.
                        Was thinking of using this on my new engine build but now decided to see what i can build using the Athena 170 kit so just bought them.
                        https://www.ebay.co.uk/itm/YAMAHA-WR-200-3XP-4BF-NEW-SLEEVED-BIG-BORE-68mm-Cylinder-PISTON-3XP-11311-00-00/113185389112?hash=item1a5a5ffa38:g:3fwAAOSwEfBbZ3Je

                        @Louis-James where did you get the final drive shaft from as need one for my new build. thanks

                        Louis-DT-WRL 1 Reply Last reply
                        1
                        • 2 2stroketerry

                          @Louis-James Great little engine your building and like seeing quality work that you do. When i put a 57mm stroke crank in mine didn't fit the washer under the PRIMARY DRIVE GEAR NUT so the so the nut had the maximum amount of threads to screw onto.

                          0_1537452840393_nut.jpg

                          The tabbed washer inside the splined washer is used to set the mainshaft endfloat on the clutch on some yamaha engines as they mix and match some gears inside the crankcase.
                          Was thinking of using this on my new engine build but now decided to see what i can build using the Athena 170 kit so just bought them.
                          https://www.ebay.co.uk/itm/YAMAHA-WR-200-3XP-4BF-NEW-SLEEVED-BIG-BORE-68mm-Cylinder-PISTON-3XP-11311-00-00/113185389112?hash=item1a5a5ffa38:g:3fwAAOSwEfBbZ3Je

                          @Louis-James where did you get the final drive shaft from as need one for my new build. thanks

                          Louis-DT-WRL Offline
                          Louis-DT-WRL Offline
                          Louis-DT-WR
                          wrote on last edited by
                          #23

                          @2stroketerry thanks man, I also ran a blaster 200 crankshaft on my original 200cc engine but wasn't happy with less gear meshing between the primary drive and clutch.

                          With regards to the tab washer.. I can't see it on any exploded diagrams. What years use it?

                          The final drive shaft I got brand new on eBay from Greece , £30 from memory, from Yamaha it's around £100

                          1 Reply Last reply
                          0
                          • Irongamer727I Offline
                            Irongamer727I Offline
                            Irongamer727
                            wrote on last edited by
                            #24

                            Won't the 199cm3 text be an issue at the mot?

                            1 Reply Last reply
                            0
                            • 2 Offline
                              2 Offline
                              2stroketerry
                              wrote on last edited by
                              #25

                              @Irongamer727 I have an Athena 170cc kit with a 65mm piston in it that has 124cm3 cast on the side as well as Yamaha 5ML00 on it even though there is no such Yamaha cylinder number so no probelems with mot, police or insurance wise. The cylinder has a base spacer and has been skimmed to the correct compression ratio as well as the exhaust port and powervalve modified being 5mm wider, the transfer ports are raised by 1.5mm. Running the standard tm28 carb with power jet blocked and a 310 main jet it makes maximum power at 11,500 rpm and 37hp. No idea of top speed but running standard 16 57 gearing it goes straight off the clock in 5th gear but clock only goes to 80mph and will rev to maximum revs in 6th gear so it
                              probably does about 100mph. Was going to gear it up but wheelies mental and when gets to 10,000 rpm it just goes mental with power.
                              0_1537571994788_10.jpg

                              0_1537572031838_13.jpg

                              1 Reply Last reply
                              1
                              • Louis-DT-WRL Offline
                                Louis-DT-WRL Offline
                                Louis-DT-WR
                                wrote on last edited by
                                #26

                                Many MOT testers don't care tbh, but you could file the numbers off or do your big bike test.

                                I think 2 strokes cc should be measured from above the exhaust port anyway 😉

                                1 Reply Last reply
                                0
                                • Louis-DT-WRL Offline
                                  Louis-DT-WRL Offline
                                  Louis-DT-WR
                                  wrote on last edited by
                                  #27

                                  Finally after 3 suppliers sending the wrong small end bearing... it's on.

                                  Forgot how beasty the piston looks in the 125 cases.

                                  alt text
                                  alt text

                                  NINJAN 1 Reply Last reply
                                  2
                                  • Louis-DT-WRL Louis-DT-WR

                                    Finally after 3 suppliers sending the wrong small end bearing... it's on.

                                    Forgot how beasty the piston looks in the 125 cases.

                                    alt text
                                    alt text

                                    NINJAN Offline
                                    NINJAN Offline
                                    NINJA
                                    wrote on last edited by NINJA
                                    #28

                                    @Louis-James Looks good - Which size piston is that dude???

                                    SEDUCED BY THE DARK SIDE!!!

                                    Louis-DT-WRL 1 Reply Last reply
                                    0
                                    • NINJAN NINJA

                                      @Louis-James Looks good - Which size piston is that dude???

                                      Louis-DT-WRL Offline
                                      Louis-DT-WRL Offline
                                      Louis-DT-WR
                                      wrote on last edited by
                                      #29

                                      @NINJA it's standard wr200 size (66.80mm)

                                      CalumC 1 Reply Last reply
                                      0
                                      • Louis-DT-WRL Louis-DT-WR

                                        @NINJA it's standard wr200 size (66.80mm)

                                        CalumC Online
                                        CalumC Online
                                        Calum
                                        wrote on last edited by
                                        #30

                                        @Louis-James Is that on the standard stoke?

                                        Always Originate, Never Pirate!

                                        Louis-DT-WRL 1 Reply Last reply
                                        0
                                        • CalumC Calum

                                          @Louis-James Is that on the standard stoke?

                                          Louis-DT-WRL Offline
                                          Louis-DT-WRL Offline
                                          Louis-DT-WR
                                          wrote on last edited by
                                          #31

                                          @Calum no, it's a wr200 crankshaft 57mm stroke

                                          stinkwheelerS 1 Reply Last reply
                                          0
                                          Reply
                                          • Reply as topic
                                          Log in to reply
                                          • Oldest to Newest
                                          • Newest to Oldest
                                          • Most Votes


                                          • Login

                                          • Don't have an account? Register

                                          • Login or register to search.
                                          • First post
                                            Last post
                                          0
                                          • Recent
                                          • Tags
                                          • Popular
                                          • Users
                                          • Groups