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DT125R FORUM

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  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
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  • 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
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          • 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
                          • 2 Offline
                            2 Offline
                            2stroketerry
                            wrote on last edited by
                            #32

                            @Louis-James Looking good so far mate, nearly finished my latest engine and will post some photos once finished it. I've gone with a 60mm stroker crank from a blaster and spacer plate to raise the cylinder to suit.

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

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

                              stinkwheelerS Offline
                              stinkwheelerS Offline
                              stinkwheeler
                              wrote on last edited by
                              #33

                              @Louis-James just out of interest how much would you sell a converted engine for providing you could get the parts ?

                              The hills are alive with the sound of ... braaaap baaaaap 😁

                              Louis-DT-WRL 1 Reply Last reply
                              0
                              • stinkwheelerS stinkwheeler

                                @Louis-James just out of interest how much would you sell a converted engine for providing you could get the parts ?

                                Louis-DT-WRL Offline
                                Louis-DT-WRL Offline
                                Louis-DT-WR
                                wrote on last edited by
                                #34

                                @stinkwheeler hi, unfortunately I can't offer this as fowlers (my supplier) state that most of the parts I ordered were bottom of the barrel. I could modify the cases for someone who sources Thier own parts.
                                However this crankshaft here is the same as the dt200r https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F272935562363

                                For anyone who wants a go

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

                                  @stinkwheeler hi, unfortunately I can't offer this as fowlers (my supplier) state that most of the parts I ordered were bottom of the barrel. I could modify the cases for someone who sources Thier own parts.
                                  However this crankshaft here is the same as the dt200r https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F272935562363

                                  For anyone who wants a go

                                  Louis-DT-WRL Offline
                                  Louis-DT-WRL Offline
                                  Louis-DT-WR
                                  wrote on last edited by
                                  #35

                                  @Louis-James

                                  I'm literally waiting for a few nuts and washers to come+ the correct oil pump drive shaft... There's 2 versions.

                                  If anyone has a dt200r , wr200 or dt200wr head spare.. let me know. Rather buy off here..

                                  1 Reply Last reply
                                  0
                                  • Louis-DT-WRL Offline
                                    Louis-DT-WRL Offline
                                    Louis-DT-WR
                                    wrote on last edited by
                                    #36

                                    alt text

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                                    alt text

                                    1 Reply Last reply
                                    1
                                    • Louis-DT-WRL Offline
                                      Louis-DT-WRL Offline
                                      Louis-DT-WR
                                      wrote on last edited by
                                      #37

                                      alt text

                                      alt text

                                      alt text

                                      alt text

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

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                                        NINJAN Offline
                                        NINJAN Offline
                                        NINJA
                                        wrote on last edited by
                                        #38

                                        @Louis-James Honestly that engine is just down right filthy, I just do not know how you have the balls to post pics of an engine is such poor disrepair!!!

                                        :grinning_face_with_smiling_eyes: :smiling_face_with_open_mouth_closed_eyes: :smiling_face_with_open_mouth_cold_sweat: :face_with_tears_of_joy: 🤣 🤣 🤣 🤣

                                        But seriously though dude, she looks clinically clean - are you building this on an operating table???

                                        SEDUCED BY THE DARK SIDE!!!

                                        Louis-DT-WRL 1 Reply Last reply
                                        1
                                        • CalumC Online
                                          CalumC Online
                                          Calum
                                          wrote on last edited by
                                          #39

                                          That's looking smart, should finish it off with a load of titanium bolts.

                                          Always Originate, Never Pirate!

                                          Louis-DT-WRL 1 Reply Last reply
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