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Can you swap out your 1600 engine and trans for a 1700??

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  • Can you swap out your 1600 engine and trans for a 1700??

    I have an 2003 1600 roadstar midnight edition.... trans is getting shaking g in couple gears... so.eone told me I can switch out the 1600 engine and trans with an 2005 1700 engine with trans.....just need the 1700 bracket on top to boot it on and the rest lines up perfect...

    Has anyone done this or know if this info is correct? Thanks so much

  • #2
    The frame is the same part number for 1600 and 1700 so yes they will swap.

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    • #3

      Comment


      • roadiemort
        roadiemort commented
        Editing a comment
        Top motor mount is different but can be made to work by slotting existing holes.

    • #4
      As long as the 1700 is not from a Roadstar Warrior, yes.

      Comment


      • Jaybo
        Jaybo commented
        Editing a comment
        Bubba, seems like a saw a build with someone that used a Warrior motor in a R* chassis?

    • #5
      Yeah it works. I did it on my current build. I bought a whole set of motor mounts off ebay for like $25 just in case, but only needed the top mount. Everything else is the same.
      Just FYI, the transfer case is the same so if you find a good deal on a motor that doesn't come with the transfer case, you can do that too.
      Just a dude, playing a dude, disguised as another dude.

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      • #6
        Will the trans from a 1600 fit and work on a 1700.

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        • #7
          Itbeme are you piecing together parts to fit in an engine? Only thing seperate from the engine is the transfer case.

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          • #8
            No I think my trans is going south, so if I have to get a replacement I want to know it ether will work.

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            • #9
              The 1600 and 1700 transmissions are the same. The 1700 Warrior transmission will work as well, but I think, there is a little gear ratio difference.
              You will have to split the engine case to install the shafts and gears.

              What is your transmission doing to make you think your transmission is going bad?

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              • #10
                I just discovered something today as I was working on mine; referring to the three bolts at the rear of the left side where the drive pulley housing attaches to the motor, on the 1600 it takes three M8-1.25 bolts, on the 1700 they went up to M10-1.25. If you are using a 1600 transfer case on a 1700 motor (as I am) you will need to drill out those three holes on the drive pulley housing from 8mm to 10mm. You will also need to get three M10-1.25 x 40mm bolts.

                (I hope that makes sense) Let's see if it will let me post pics . . .
                Just a dude, playing a dude, disguised as another dude.

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                • #11
                  Click image for larger version

Name:	Transfer Case 1.jpg
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ID:	93206
                  Just a dude, playing a dude, disguised as another dude.

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                  • #12
                    Click image for larger version

Name:	Transfer Case 2.jpg
Views:	95
Size:	281.4 KB
ID:	93208
                    Just a dude, playing a dude, disguised as another dude.

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                    • #13
                      If they can put a mercedes engine, Volkswagen brakes and other brand parts on a 57 chevy in Cuba to keep it running I guess drilling a few holes to use a 1600 transfer case on a 1700 is a relatively easy thing to do. lol

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                      • #14
                        I'm curious, what would the downsides be to just eliminate the transfer case and run a sprocket direct?
                        2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

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                        • #15
                          Alot of work and money switching sides for the drive for something that don't have many issues. Most issues stem from stripped shaft from not checking and maintaining the drive pulley nut.

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                          • #16
                            Dave, Oh I get that, but my thinking was thinking of a custom build mostly, it would take a lot of parasitic power loss away as well as weight savings and simplicity. Was wondering if there were other downsides to doing that.
                            2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

                            Comment


                            • #17
                              Originally posted by Jaybo View Post
                              I'm curious, what would the downsides be to just eliminate the transfer case and run a sprocket direct?
                              The transfer case not only holds a couple of quarts of oil it also has a pump in it to move that oil into the engine crankcase.

                              Comment


                              • Brad_G
                                Brad_G commented
                                Editing a comment
                                I'm not so sure. If by transfer case you mean the right side of the bike. That chain case takes a different oil than the engine. I don't believe they mix but are separate systems.

                            • #18
                              The oil tank is part of the transfer case, but the oil pump is in the engine. I've seen a few custom builds with a right side chain drive, and a separate oil tank, Harley style. The chain would be pretty long, but it would also eliminate a lot of parasitic drivetrain losses, not to mention weight and that damned pulley nut.
                              2000 Roadstar 1600 - BAK, Pumpless, Curt's manifold, Mikuni HSR42 Freedom Combat Pipes Jumbo Strong bags, PPG 'HellFire' Paint.

                              Comment


                              • Spydr
                                Spydr commented
                                Editing a comment
                                Jaybo, the oil tank only holds the oil that circulates thru the engine. The transfer case is a seperate system and only holds the Gear oil that lubes the final drive chain.
                                Let's not confuse the Newbees that don't know any better.

                              • Jaybo
                                Jaybo commented
                                Editing a comment
                                Spydr, sorry,yes that is what I meant. the transfer case has its own oil bath system, but the transfer case has an engine oil tank built into the case casting for the engine.

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