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  • mt-01 engine swap

    Has anyone ever done a mt-01 engine swap on their road star?
    online sources claim the mt-01 engine has 90hp where the roadstar has 63hp
    It also is chain driven which is something I've been wanting to do also
    Obviously it would take a lot of work, I think if I did this I would end up making a rigid frame for it

    Any thoughts on this?

  • #2
    MT-01 Rare, not sold in USA and any old beat used one fetches$ 6000 to $8000 here in Canada and up for pristine. If you can find one don't be the one to butcher a collector item, RIDE it instead.

    Comment


  • #3
    Originally posted by roadiemort View Post
    MT-01 Rare, not sold in USA and any old beat used one fetches$ 6000 to $8000 here in Canada and up for pristine. If you can find one don't be the one to butcher a collector item, RIDE it instead.
    Yeah after talking to a friend of mine he told me the same thing that they weren't sold in the usa

    If I could find an engine I would still want to try it, maybe I should be checking the Tijuana craigslist section...

    Comment


    • Lucky
      Lucky commented
      Editing a comment
      You would be better off getting a Roadstar engine (engine only) no middle drive and just buying a sprocket for right side drive. Only about $20.00

      The MT-01 engine has the external oil tank built into the left front side of the engine
      and the plumbing goes under the bottom of the engine. That could be a problem if you are using an aftermarket frame. Also it sticks out further and could be a problem with the foot controls.

  • #4
    I ended up finding an engine on ebay for about $700 shipped
    The temptation to grab it is almost too much to handle.....

    Comment


    • Lucky
      Lucky commented
      Editing a comment
      That would be a mistake.

  • #5
    But let us know if you pull the trigger.
    It's not that life is so short, it's just that you're dead for so long.---unknown.

    Comment


    • #6
      Lucky,
      Thanks for the info, I read an article where someone swapped out the 1700 engine into a 1600 frame with some modifications to the upper frame mount but I had no idea about the oil tank, I'm guessing that would explain why it looks different on the left side
      I originally planned to make a rigid frame but was trying to figure out if I could possibly bolt it into the existing one

      And is it a mistake as in it isn't actually a mt-01 engine?
      Or a mistake on my part for attempting it?

      Here is a picture of the engine I'm looking at, it threw me off because someone said it wasn't available in the states but it's coming from ohio
      There was also a picture of the bike running before the engine was removed but I saw that it had 59,000 miles which seemed like a lot

      Click image for larger version

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      Comment


      • Bikerron
        Bikerron commented
        Editing a comment
        I read an article where someone swapped out the 1700 engine into a 1600 frame with some modifications to the upper frame mount...
        Most likely just replaced the 1600 with an ‘04 to ‘07 carbed Road Star engine. Not from a MT-01.

    • #7
      Can you think of any other issue I could encounter?

      Comment


      • Lucky
        Lucky commented
        Editing a comment
        What was it advertised as? It certainly looks different! I do not see the clutch lever pivot arm. Maybe it is in a different location. The valve covers are way different. No starter.
        Must be a MT-01? No MT-01 oil tank though. Hmmmm.
        If it is fuel injection originally you will need to get all those fuel injection parts and that will be difficult. 60,000 miles is ok. Be sure to look at the clutch plates. If the metal plates are blue or brown color you will want to change them. IF you decide to keep it fuel injection then you will certainly need the MT-01 wiring harness and that may be hard to get as well. You will need the MT-01 igniter box and other relays.
        Make sure if you use this engine to get a Clymers workshop manual. It has a color wiring diagram.

        I would consider just putting carb on it and treat it like a Roadstar. Make it R/H drive of course. Get you own oil tank. Use a Roadstar wiring harness and relay.

        I wish we could see the other side of the engine.

      • texasscott1
        texasscott1 commented
        Editing a comment
        The MT01 has a hydraulic clutch.

    • #8
      If it is a MT-01 I’m curious as to how you’d fit twin throttle bodies up under the tank?

      Comment


      • roadiemort
        roadiemort commented
        Editing a comment
        LOL.

      • Lucky
        Lucky commented
        Editing a comment
        Good question.

    • #9
      It won't... It'll be Big Time fabrication to get it in there!!! But, some of you here have the skills and equipment... and, we'd all love to follow the progress!

      Comment


      • #10
        Well I was planing on n getting a frame jig and tube bender in a few months.....
        I guess the issue with the throttle bodies fitting would be a significant one, and modifying the frame to that extent might not be worth it
        BUT a completely custom frame might make it worth my time....
        Here's a picture of the bike running before the engine was pulled, seems like it doesn't sound too happy, what do you guys think?

        https://www.youtube.com/embed/O5CIWDpZIFw?rel=0

        Comment


        • #11
          What year Road Star do you own now?
          Scott B.

          Comment


          • #12
            Does it come with the designated ECU and all the sensors?

            Comment


            • #13
              So now you have a MT-01 engine missing a lot of parts. No fuel injection, no oil engine mounted oil tank, no wiring harness, no ECU or relays, no starter , no hydraulic clutch resivoir, no MT-01 oil lines, and it has 60,000 miles on it.

              Frame building fixture, and tubing bender will be needed for building a custom frame.
              You would be hundreds of dollars ahead to buy a Roadstar aftermarket frame.

              Not a good starting point.

              Comment


              • #14
                It's just a 1700 (1670). Looks like it would be cheaper to buy a FI Road Star and hunt up some speedstar parts.
                Scott B.

                Comment


                • #15
                  What kind of bike do you want to end up with? Bobber,chopper, stock street killer?
                  You need a plan to start with. Then work the plan.

                  BTW.. Once in a while I see a MT-01 oil bag for sale on Ebay. Sometimes the whole unit or inside or outside half.
                  You might save a lot of money or time to just use a carb. Then it is easy to get a wiring harness on Ebay.

                  You can just buy your own oil tank and lines.
                  The MT-01 is 5.3 qt.oil capacity.

                  Comment


                  • #16
                    Looks like quite the challenge, Mr. Jones. Don't let it scare ya. You got this!!!!!!!!!!!!!

                    Comment


                    • #17
                      Man that thing really sounded like it would rip! If you used a carb it probably wouldn't have 90 horsepower. Unless you use all it's components, including the exhaust system which is most certainly tuned, it won't have the same performance. And, if that's the case, might as well go with a Roadstar motor. IIRC the Roadstar motor, even with cams, big bore, big carb et al did not make 90 horsepower. This project would be very difficult, but, if you could make it work, you would have something really special, perhaps even one of a kind. It's probably not something you would ever get your money back out of, it would have to be for personal pride. I figure at the very least $12K, that's with you building the frame. Is it worth it? Only you can answer that.


                      Comment


                      • #18
                        I have found that It's hard to find accurate HP ratings for any bike but this is what I could find on the MT01. Keep in mind that it is Wikipedia so accuracy is only what someone wants it to be lol
                        .
                        Top speed: 210 km/h (130 mph)
                        Torque: 150.3 N⋅m (110.9 lb⋅ft) @ 3,750 rpm
                        Fuel capacity: 15 L (3.3 imp gal; 4.0 US gal)
                        Oil capacity: 5 L (5.3 US qt)
                        Power: 66.3 kW (88.9 hp) @ 4,750 rpm
                        Engine: 1,670 cc (102 cu in) air-cooled, 4-stroke, 4-valve OHV V-twin
                        Dimensions: L: 2,185 mm (86.0 in); W: 800 mm (31 in); H: 1,105 mm (43.5 in)

                        The HP and Tq are about the same as my Big Bore that was dynoed to get the numbers. Also keep in mind that my numbers are actually lower than what is possible with a Patrick racing Big Bore because I didn't have Patrick do the heads. I just cleaned them up and did a home porting job myself and still have the OE size valves.
                        I'm at 87hp and 108 Tq with a HSR 45 carb

                        Comment


                        • Jclevesque
                          Jclevesque commented
                          Editing a comment
                          Pretty impressive numbers on your bike Dave. Have a recent pic of it?

                        • davej
                          davej commented
                          Editing a comment
                          Mine is just a dressed up 07 1700 with the Big Bore. I can't post a pic in this reply but will post a pic of the bike and Big Bore in the thread under my last post

                      • #19
                        Here is another spec from an article from "Top Speed" this is why I said it is hard to find a accurate spec on a bike. The tq spec on this is unbelievable but I think the HP spec is closer to what a stock MT would be. It is my understanding that the MT is a 1700 but with a different cam and head configuration much like a warrior.
                        • 2012 Yamaha MT-01
                        • Year:
                          2012
                        • Make:
                          Yamaha
                        • Model:
                          MT
                        • Transmission:
                          Constant Mesh, 5-speed
                        • Horsepower @ RPM:
                          66 @ 4750
                        • Torque @ RPM:
                          150 @ 3750
                        • Energy:
                          Fuel Injection
                        • Displacement:
                          1670 L

                        Comment


                        • #20
                          Click image for larger version  Name:	Big Bore Dyno.jpeg Views:	0 Size:	130.6 KB ID:	83857Click image for larger version  Name:	zz duals post 2.jpg Views:	0 Size:	27.4 KB ID:	83853Click image for larger version  Name:	parts table post.jpg Views:	0 Size:	26.7 KB ID:	83854Click image for larger version  Name:	cams post.jpg Views:	0 Size:	20.8 KB ID:	83855Click image for larger version  Name:	zbig bore post.jpg Views:	0 Size:	17.1 KB ID:	83856

                          Comment


                          • Jclevesque
                            Jclevesque commented
                            Editing a comment
                            Awesome bike and mods Dave. Love the 2 tone color. One if my favorites on here. Great effort!

                          • Duke
                            Duke commented
                            Editing a comment
                            You have a cool looking bike Dave. Nice work! 7/2/2020.
                            I just noticed this picture, I was working on the harvest last August.

                          • davej
                            davej commented
                            Editing a comment
                            Thanks Duke. BTW that dyno I posted above was before I had the heads ported and +2mm valves installed. It dynoed at 90hp and 114 tq after the heads. I just done some more tuning to lean it out some from the last dyno and added 2 degrees of timing and a better flowing air cleaner. I can tell a big difference from the last dyno. I hope to get another dyno next week

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