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. Owners Build Threads
  3. Other
  4. The Helios Project (Aprilia RS 125 Rotax 122 Biaggi Race Replica)

The Helios Project (Aprilia RS 125 Rotax 122 Biaggi Race Replica)

Scheduled Pinned Locked Moved Other
312 Posts 22 Posters 123.3k Views 1 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.
  • Irongamer727I Irongamer727

    Could you bring it to Oxford sometime between the 18th of June to 1 of July? I'm going on a language course then.😉

    CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #68

    @irongamer727 I doubt it'll be done by then lol.

    Always Originate, Never Pirate!

    declanD 1 Reply Last reply
    0
    • CalumC Calum

      @irongamer727 I doubt it'll be done by then lol.

      declanD Offline
      declanD Offline
      declan
      wrote on last edited by
      #69

      @calum I think we should all meet up just to ride your bike lol

      CalumC 1 Reply Last reply
      0
      • declanD declan

        @calum I think we should all meet up just to ride your bike lol

        CalumC Offline
        CalumC Offline
        Calum
        wrote on last edited by
        #70

        @declan Shotgun going on it first!

        Always Originate, Never Pirate!

        declanD 1 Reply Last reply
        0
        • CalumC Calum

          @declan Shotgun going on it first!

          declanD Offline
          declanD Offline
          declan
          wrote on last edited by
          #71

          @calum I’ll ride bitch on the the back lol

          CalumC 1 Reply Last reply
          0
          • declanD declan

            @calum I’ll ride bitch on the the back lol

            CalumC Offline
            CalumC Offline
            Calum
            wrote on last edited by
            #72

            @declan Uhhmm, did you not see I blanked off the Pillion seat mate.

            Always Originate, Never Pirate!

            declanD 1 Reply Last reply
            0
            • CalumC Calum

              @declan Uhhmm, did you not see I blanked off the Pillion seat mate.

              declanD Offline
              declanD Offline
              declan
              wrote on last edited by
              #73

              @calum I did but I’m sure it will be comfy enough or I’ll get a metal basket for the front and we can just go straight ET style

              CalumC 1 Reply Last reply
              2
              • declanD declan

                @calum I did but I’m sure it will be comfy enough or I’ll get a metal basket for the front and we can just go straight ET style

                CalumC Offline
                CalumC Offline
                Calum
                wrote on last edited by
                #74

                @declan Uhmm, let me think about that...

                (Calum is typing...)

                Always Originate, Never Pirate!

                declanD 1 Reply Last reply
                0
                • CalumC Calum

                  @declan Uhmm, let me think about that...

                  (Calum is typing...)

                  declanD Offline
                  declanD Offline
                  declan
                  wrote on last edited by
                  #75

                  @calum lol guessing it’s a no then

                  1 Reply Last reply
                  0
                  • CalumC Offline
                    CalumC Offline
                    Calum
                    wrote on last edited by
                    #76

                    Everyone I asked about whether I should or should not, said should NOT!

                    Are they mental...

                    What's in the box!

                    alt text

                    Bare in mind, I only want a few components out of this box that are no bigger than a hammer lol!

                    alt text

                    Any ideas?

                    If you guessed a kickstart, then you guess correctly!

                    alt text

                    And I know what you are thinking. Why?

                    Well appreciate this, this bike ain't an everyday bike, chances are, when I do eventually come to ride it, the battery is going to be flat and I'll have to bump it. Which, no I ain't doing.

                    Plus, it's totally bad ass crosser stylie yo!

                    On a serious note though, £600 for the kickstart from Aprilia. I kid you not, it's genuinely cheaper to buy a whole engine (if you can find one) just to salvage the kickstart out of it.

                    This would be my third Rotax 122 engine for this single project. That's, uhhmm, expensive.

                    I am going to strip this engine, salvage some of the components, sell the rest.

                    I want to go all out on a special conversion (for no other reason than because it will be cool) on this bike.

                    And I'll give you a clue, having a spare engine is going to be useful.

                    I will gut the cases and leave what I want to modify in place. And hopefully have something to document.

                    Eventually I will rebuild the cases and store in case of the inevitable happens.

                    This engine comes out of an Aprilia MX125, ETX125 or RX125. But all of which are really hard to source and expensive when you do. That said, I've got this now, and it's blown the budget for this month, which is a shame. But such is life.

                    Always Originate, Never Pirate!

                    Irongamer727I 1 Reply Last reply
                    1
                    • CalumC Calum

                      Everyone I asked about whether I should or should not, said should NOT!

                      Are they mental...

                      What's in the box!

                      alt text

                      Bare in mind, I only want a few components out of this box that are no bigger than a hammer lol!

                      alt text

                      Any ideas?

                      If you guessed a kickstart, then you guess correctly!

                      alt text

                      And I know what you are thinking. Why?

                      Well appreciate this, this bike ain't an everyday bike, chances are, when I do eventually come to ride it, the battery is going to be flat and I'll have to bump it. Which, no I ain't doing.

                      Plus, it's totally bad ass crosser stylie yo!

                      On a serious note though, £600 for the kickstart from Aprilia. I kid you not, it's genuinely cheaper to buy a whole engine (if you can find one) just to salvage the kickstart out of it.

                      This would be my third Rotax 122 engine for this single project. That's, uhhmm, expensive.

                      I am going to strip this engine, salvage some of the components, sell the rest.

                      I want to go all out on a special conversion (for no other reason than because it will be cool) on this bike.

                      And I'll give you a clue, having a spare engine is going to be useful.

                      I will gut the cases and leave what I want to modify in place. And hopefully have something to document.

                      Eventually I will rebuild the cases and store in case of the inevitable happens.

                      This engine comes out of an Aprilia MX125, ETX125 or RX125. But all of which are really hard to source and expensive when you do. That said, I've got this now, and it's blown the budget for this month, which is a shame. But such is life.

                      Irongamer727I Offline
                      Irongamer727I Offline
                      Irongamer727
                      wrote on last edited by
                      #77

                      And I'm worrying about spending £70 on a full kickstart conversion for my dt... Guess your pocket is a bit bigger than mine though😉

                      CalumC 1 Reply Last reply
                      1
                      • Irongamer727I Irongamer727

                        And I'm worrying about spending £70 on a full kickstart conversion for my dt... Guess your pocket is a bit bigger than mine though😉

                        CalumC Offline
                        CalumC Offline
                        Calum
                        wrote on last edited by
                        #78

                        @irongamer727 I did say it was cheaper to buy a whole engine just for the kickstart than the kickstart itself.

                        Whilst this did cost more than £70, it didn't cost £600. But I was prepared to pay that for it.

                        I will strip the engine tomorrow and finish off my current build.

                        You understand though, you need a kickstart on a two stroke.

                        Always Originate, Never Pirate!

                        declanD 1 Reply Last reply
                        0
                        • CalumC Calum

                          @irongamer727 I did say it was cheaper to buy a whole engine just for the kickstart than the kickstart itself.

                          Whilst this did cost more than £70, it didn't cost £600. But I was prepared to pay that for it.

                          I will strip the engine tomorrow and finish off my current build.

                          You understand though, you need a kickstart on a two stroke.

                          declanD Offline
                          declanD Offline
                          declan
                          wrote on last edited by
                          #79

                          @calum your telling me a kick start is over 600 pound 🤯

                          CalumC 1 Reply Last reply
                          0
                          • declanD declan

                            @calum your telling me a kick start is over 600 pound 🤯

                            CalumC Offline
                            CalumC Offline
                            Calum
                            wrote on last edited by
                            #80

                            @declan New from Aprilia yeah. They only did them for the Sports Production series. The series they used in the SuperTeen MotoGP. So they were a highly specialised order!

                            Always Originate, Never Pirate!

                            CalumC 1 Reply Last reply
                            0
                            • CalumC Calum

                              @declan New from Aprilia yeah. They only did them for the Sports Production series. The series they used in the SuperTeen MotoGP. So they were a highly specialised order!

                              CalumC Offline
                              CalumC Offline
                              Calum
                              wrote on last edited by Calum
                              #81

                              LOL at this engine. It was sold to me as :

                              Came from a Sx in good condition just had new piston con rod main bearings been running for about 5 mind what you see is what you get

                              It was also listed as a Rotex engine, not what it should be as Rotax.

                              So I can't say I am really surprised. Item was well wrapped and delivered within 48 hours and I got what I actually wanted. But check out the rebuild on this engine.

                              Firstly the head is absolutely ruined, straight in the bin this went.

                              alt text

                              Secondly the bore is totalled, but it's an aftermarket Mitaka one so runs a steel liner, meaning it can be rebored so isn't totally scrap. But definitely affects my resale value 😞 Was hoping to claw back a few sheets on this engine to pay for the conversion.

                              alt text

                              I didn't get a photo, but the crank journals have a nasty score in them which I would want to fix. Shame. The crank looks okay, although given the damage done to the rest of the engine, I would have it rebuilt.

                              And the little end, which was probably what caused the fault in the first place.

                              alt text

                              Prepped the cases to shot blast next weekend.

                              alt text

                              I'm going to use this engine as a base to fabricate up the part I want. It's gutted other than the bearings, purely has a means to protect the journals. But in time I will rebuild this engine and leave it as a spare.

                              Now back to my engine 😄

                              alt text

                              As you can see, it's now dual wielding both the Starter motor and the kick start mechanism, which is nice.

                              Just missing a titanium bolt that secures the kicker in place, I shall get that ordered.

                              Engine has been timed up and all new gears installed.

                              Just waiting on PJME to get new clutches in and then hopefully sort the top end out next month. Got some tasty ideas for the top end.

                              Always Originate, Never Pirate!

                              declanD 1 Reply Last reply
                              0
                              • CalumC Calum

                                LOL at this engine. It was sold to me as :

                                Came from a Sx in good condition just had new piston con rod main bearings been running for about 5 mind what you see is what you get

                                It was also listed as a Rotex engine, not what it should be as Rotax.

                                So I can't say I am really surprised. Item was well wrapped and delivered within 48 hours and I got what I actually wanted. But check out the rebuild on this engine.

                                Firstly the head is absolutely ruined, straight in the bin this went.

                                alt text

                                Secondly the bore is totalled, but it's an aftermarket Mitaka one so runs a steel liner, meaning it can be rebored so isn't totally scrap. But definitely affects my resale value 😞 Was hoping to claw back a few sheets on this engine to pay for the conversion.

                                alt text

                                I didn't get a photo, but the crank journals have a nasty score in them which I would want to fix. Shame. The crank looks okay, although given the damage done to the rest of the engine, I would have it rebuilt.

                                And the little end, which was probably what caused the fault in the first place.

                                alt text

                                Prepped the cases to shot blast next weekend.

                                alt text

                                I'm going to use this engine as a base to fabricate up the part I want. It's gutted other than the bearings, purely has a means to protect the journals. But in time I will rebuild this engine and leave it as a spare.

                                Now back to my engine 😄

                                alt text

                                As you can see, it's now dual wielding both the Starter motor and the kick start mechanism, which is nice.

                                Just missing a titanium bolt that secures the kicker in place, I shall get that ordered.

                                Engine has been timed up and all new gears installed.

                                Just waiting on PJME to get new clutches in and then hopefully sort the top end out next month. Got some tasty ideas for the top end.

                                declanD Offline
                                declanD Offline
                                declan
                                wrote on last edited by
                                #82

                                @calum don’t know what your on about mate looks ready to race to me 😉 what did the piston look like

                                CalumC 1 Reply Last reply
                                0
                                • declanD declan

                                  @calum don’t know what your on about mate looks ready to race to me 😉 what did the piston look like

                                  CalumC Offline
                                  CalumC Offline
                                  Calum
                                  wrote on last edited by
                                  #83

                                  @declan Piston wasn't too bad. Could have used that. But I threw it in the bin. Wasn't even forged.

                                  Always Originate, Never Pirate!

                                  declanD 1 Reply Last reply
                                  0
                                  • CalumC Calum

                                    @declan Piston wasn't too bad. Could have used that. But I threw it in the bin. Wasn't even forged.

                                    declanD Offline
                                    declanD Offline
                                    declan
                                    wrote on last edited by
                                    #84

                                    @calum so maybe a stupid question but was it rebuilt badly or not rebuilt at all

                                    CalumC 1 Reply Last reply
                                    0
                                    • declanD declan

                                      @calum so maybe a stupid question but was it rebuilt badly or not rebuilt at all

                                      CalumC Offline
                                      CalumC Offline
                                      Calum
                                      wrote on last edited by
                                      #85

                                      @declan Nah man I don't think it's a stupid question.

                                      So it's been stripped before.

                                      There was a rusty bolt on the inside of the engine. That suggests that they just used a bolt that would normally be outside the engine on the inside. Since it was an OEM bolt.

                                      Also, the crank is really solid.

                                      I reckon, someone who didn't know what they were doing, rebuilt it poorly. Started it up. heard a horrendous noise, and then gave up on the idea after sinking too much money on it.

                                      The barrel doesn't look to have been rebored. So it was likely a new barrel at the time. The piston wasn't the highest quality, but it was a decent piston.

                                      I doubt the mains were changed, and they clearly didn't bother with the gearbox bearings. I reckon the minimal amount was done. But once it still didn't run right, they gave up on the idea.

                                      It's funny though.

                                      As I say, the cases are handy for my next project I'll be doing on this bike.

                                      And all I really wanted was the kickstart. I've managed to sell some of the bits I've stripped from it on eBay. So that's some way of clawing the money back out of it.

                                      Always Originate, Never Pirate!

                                      declanD 1 Reply Last reply
                                      0
                                      • CalumC Calum

                                        @declan Nah man I don't think it's a stupid question.

                                        So it's been stripped before.

                                        There was a rusty bolt on the inside of the engine. That suggests that they just used a bolt that would normally be outside the engine on the inside. Since it was an OEM bolt.

                                        Also, the crank is really solid.

                                        I reckon, someone who didn't know what they were doing, rebuilt it poorly. Started it up. heard a horrendous noise, and then gave up on the idea after sinking too much money on it.

                                        The barrel doesn't look to have been rebored. So it was likely a new barrel at the time. The piston wasn't the highest quality, but it was a decent piston.

                                        I doubt the mains were changed, and they clearly didn't bother with the gearbox bearings. I reckon the minimal amount was done. But once it still didn't run right, they gave up on the idea.

                                        It's funny though.

                                        As I say, the cases are handy for my next project I'll be doing on this bike.

                                        And all I really wanted was the kickstart. I've managed to sell some of the bits I've stripped from it on eBay. So that's some way of clawing the money back out of it.

                                        declanD Offline
                                        declanD Offline
                                        declan
                                        wrote on last edited by declan
                                        #86

                                        @calum sold bits already? Well it’s a good thing You didn’t want the engine as a whole isn’t it

                                        CalumC 1 Reply Last reply
                                        0
                                        • declanD declan

                                          @calum sold bits already? Well it’s a good thing You didn’t want the engine as a whole isn’t it

                                          CalumC Offline
                                          CalumC Offline
                                          Calum
                                          wrote on last edited by
                                          #87

                                          @declan Literally just wanted the idle gear and the kickstart mate. The rest I already have.

                                          But for this tasty little conversion I am going to do, it would be nice to have a pair of crankcases to hand 😉

                                          I ain't saying no more than that, you will see the results when I finish.

                                          Always Originate, Never Pirate!

                                          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