T120/tr6 Subframe Help Please

Discussion in 'Vintage Classics' started by Dave UK, Jun 27, 2020.

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  1. Dave UK

    Dave UK New Member

    Jan 7, 2020
    23
    3
    Surrey UK
    I’m trying to get a chopped TR6 back on the road.

    I have sourced a rear subframe (which I think is correct for the bike/year) but it has had the rear loop cut off.

    I was hoping some kind resident here would be able to measure their rear subframe loop from the back end of the suspension mounts to the most rearward part... either in metric “mm” or inches...either would be fine.

    subframe came with a swingarm (which I know is not correct) but this is about 4 inches too long.... maybe from a t160?..... was hoping to find out what bike that came off so I can sell it on with a correct description.


    But the rear frame loop measurement is my most pressing need.

    Many thanks in advance.

    Dave (Sunny Surrey, UK)
     
  2. darkman

    darkman Crème de la Crème

    Oct 26, 2015
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    9 3/4 Dave.

    20200627_190141.jpg
     
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  3. Dave UK

    Dave UK New Member

    Jan 7, 2020
    23
    3
    Surrey UK
    Eric, thanks for your reply.
    Just one more daft question...
    What diameter is the rear bend... ie; where the bend becomes straight (if that makes sense to you) what is the width from outside to outside.
    I just need to know what curve the rear needs as I doubt that the rear loop is exactly parallel all the way as the seat curves in at the back.

    I do hope you can understand what I’m getting at, even if I haven’t explained it very well.

    thanks

    dave
     
  4. darkman

    darkman Crème de la Crème

    Oct 26, 2015
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    #4 darkman, Jun 28, 2020
    Last edited: Jun 28, 2020
    I have done the measurements on my 70 TR6C and they are the same as the first pic i posted on the FB group i moderate/run on my 69 T120R, first two pics show the rule across the frame inline with the rear of shock mount tabs on the frame. First pic confirming straight edge across frame on back of frame tabs, its 8 1/4 between frame rails here and the second pic 9 3/4 from back of shock tabs to outside of rear frame.

    20200628_181315.jpg

    20200628_181321.jpg
     
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  5. darkman

    darkman Crème de la Crème

    Oct 26, 2015
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    The next two pics show in the last half and then three quarters it's down to 8" and 7" from the 8 1/4 at the back end of the tabs.

    20200628_181632.jpg

    20200628_181708.jpg
     
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  6. darkman

    darkman Crème de la Crème

    Oct 26, 2015
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    Also you can see the radius on each side is less than 90 deg as there is a final bend in the middle rear part and have another pic showing this better.

    20200628_181759.jpg
     
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  7. darkman

    darkman Crème de la Crème

    Oct 26, 2015
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    And final pic of whole top seat rail.

    20200628_181859.jpg
     
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  8. Dave UK

    Dave UK New Member

    Jan 7, 2020
    23
    3
    Surrey UK
    that is fantastic.
    Many thanks

    Dave
     
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