1969 T120 650 Centre Cylinder Head Bolt Thread Type

Discussion in 'Vintage Classics' started by Stationary Traveller, Aug 14, 2024.

  1. Stationary Traveller

    Stationary Traveller Well-Known Member

    May 19, 2024
    23
    53
    The darkest depths of Surrey
    #1 Stationary Traveller, Aug 14, 2024
    Hi all, a mate of mine has the above and has a damaged bolt but is not sure of the thread type to get a replacement. Can anyone help with that..?
    Cheers
     
    • Useful Useful x 1
  2. speeder

    speeder Noble Member

    Jan 3, 2019
    409
    313
    dorset
    #2 speeder, Aug 19, 2024
    I don't think any of the Meriden bikes were metric, the engine on my 73 bonnie were all unified threads, not sure of the size of the head bolts but as they screw into the cast iron barrel it is most probably a UNC thread.
    Someone with some thread gauges will be able to confirm.
     
    • Like Like x 1
    • Funny Funny x 1
    • Agree Agree x 1
  3. Stationary Traveller

    Stationary Traveller Well-Known Member

    May 19, 2024
    23
    53
    The darkest depths of Surrey
    #3 Stationary Traveller, Aug 19, 2024
    Thanks for that,Speeder, much appreciated. We knew they weren’t metric but weren’t sure if they were UNC or something else as my mate thought that Triumph had made a change to the gauge they used. I think he may have it sorted now.
     
    • Like Like x 1
Loading...
Similar Threads - 1969 T120 650
  1. Paul 865

    Triumph Bonneville T120 1969 For Sale

    Paul 865, Mar 9, 2023, in forum: Vintage Classics
    Replies:
    1
    Views:
    1,522
    speedrattle
    Mar 12, 2023
  2. Mikebsquared

    1969 Tr6 T120 Workshop Manual

    Mikebsquared, May 27, 2020, in forum: Bonneville
    Replies:
    4
    Views:
    1,953
    Mark C Farthing
    Feb 3, 2022
  3. Eastbournemark

    1:10 1969 T120 Model

    Eastbournemark, Aug 20, 2018, in forum: Lounge
    Replies:
    3
    Views:
    966
    Tigcraft
    Aug 23, 2018
  4. Shabuti

    1969 T100c Rubber Mounting Engine?

    Shabuti, May 18, 2024, in forum: Vintage Classics
    Replies:
    9
    Views:
    1,816
    Wicked Pete
    Nov 1, 2024
  5. Spikeymike18

    Triumph Trident T150–t Exhaust System 1969

    Spikeymike18, Nov 12, 2023, in forum: Parts, Accessories & Clothing
    Replies:
    0
    Views:
    834
    Spikeymike18
    Nov 12, 2023

Share This Page

Sign up