Featured 1973 T100r Daytona

Discussion in 'Vintage Classics' started by graham kemp, Mar 18, 2026.

  1. graham kemp

    graham kemp Well-Known Member
    Subscriber

    Mar 1, 2026
    25
    53
    woodley
    Hi all
    In the process of getting above bike back on the road
    Before it went on display a few years ago I believe that they over tightened the oil pressure switch and cracked the timing cover
    I’m sending cover off for repair/ welding to a guy who only deals with old triumphs in Coventry
    I’m a complete novice to the triumph world and wondered if there’s anyone around the reading area who could come over and help/show me how to re do timing and points once I get cover back,
    Happy to pay/ supply tea, beer for a little help
    I have a haynes manual and a owners handbook but want a experienced triumph person if possible to show me
    Or recommend a good triumph man nr reading
    Thanks

    IMG_0457.jpeg

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  2. joe mc donald

    Subscriber

    Dec 26, 2014
    16,065
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    slough / burnham
    @graham kemp What a cracking bike. In the past i always put my Bonnies on top dead centre then marked all the points with a scribe. Then put it back the way i took it out. But there are a few very knowledgeable chaps on here if you get stuck. Myself i have help from them a couple of times at least. Good luck with the bike. I also think the covers are still available.
     
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  3. Markus

    Markus Crème de la Crème
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    Oct 28, 2020
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    All the best for your project!
    The bike looks great! ;)
     
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  4. Obijohnkenobe

    Obijohnkenobe Well-Known Member

    Dec 14, 2020
    236
    93
    Tonbridge, Kent, UK
    Lovely bike. I have a '72 but not as nice as that. I have an all black tank but your two-tone is so much classier. I also note the chromed(?) rear brake pedal and rod.
    Re: timing. I have electronic ignition but I did treat myself to a TDC tool that screws into the crankcase behind the push rod tube. Makes doing tappets and timing a lot easier. Good luck and keep us posted.
     
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  5. Samz

    Samz Elite Member
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    Aug 7, 2016
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    York uk
    That looks treat! All the best with it.
     
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  6. Fork Lock

    Fork Lock Crème de la Crème

    Beauty!

    I had a good friend who has passed. He had a '72 or '73 Bonnie, I forget. He kept it in tip-top shape. His nickname on the old Cycle World Forum (now defunct) was Vert - for Vertical Twin, of course. I think/hope his son still has it. Anyway, although I've always liked the Triumphs, his Bonnie was what pushed me over the edge and I bought a Speedmaster.

    There are a lot of very knowledgeable folks here.
     
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  7. Martine

    Martine Senior Member

    Dec 2, 2020
    809
    193
    Athens Georgia
    Entertained my morning with studying your beautiful bike and discussing with my handsome hubby...always a great morning when it includes motorcycle discussions! Thanks! Best wishes getting your situation sorted.
     
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  8. graham kemp

    graham kemp Well-Known Member
    Subscriber

    Mar 1, 2026
    25
    53
    woodley
    Ok a update so far ,
    Got timing case cover sorted and a new straight oil pressure switch all on
    Managed to redo timing, brought myself a timing tool that locked engine at 38 degrees
    New problem is the electrical side
    I have rear light and brake light
    No headlight, rev counter or speedo lights
    I’m thinking of wiring up just a headlight on its own? So I can safely ride it for the time being until i sort out the electrical side if anyone can give me a idea of how to please ( the rear light comes on and off on the light switch on top of the headlight)
    Maybe somehow linking it up with the back light?
    I’m pretty useless when it comes to electrical side
    Opened up headlight and total mess, someone has obviously had a go at it before
    On the good side tho
    I’ve started and rode it for 20 miles , starts first kick( most of the time)
    Things I’ve noticed so far
    Needs new rear brake ( adjusted already to maximum)
    Clutch slips when accelerating hard ( may get better once I’ve got a few more miles on it?)
    Won’t idle from cold (with playing with choke lever)
    But will when warm
    Seems very noisy from engine ( but might be me as used to a 2 year old Suzuki)
    Oil leak from somewhere as noticed weeping on the air cooling fins
    Speedo needle bounces all over the place when riding ( I have removed and greased the inner cable)
    If anyone has any suggestions how i can sort out the problems
    So all in all for a bike that’s not been ridden for a while ( at least 2-3 years) I’m quite happy
    Thanks
     
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  9. Obijohnkenobe

    Obijohnkenobe Well-Known Member

    Dec 14, 2020
    236
    93
    Tonbridge, Kent, UK
    #9 Obijohnkenobe, Apr 4, 2026 at 12:01 PM
    Last edited: Apr 4, 2026 at 12:52 PM
    I'm not a wiring guru (not so much a black art to me, more like a black hole!), but the headlight should always come on with the rear light (and yes, via the headlamp switch). I attach a pic of my '72 headlamp wiring if that helps at all (probably not).

    As to tickover, Daytonas were never known for great tickover, but if she's been standing for some time it wouldn't hurt to clean the jets. Particularly the pilot that governs tickover. My '72 never needs choke unless its VERY cold outside, and ticks over after a minute of warming up (although every bike is different). I re-used the carb gaskets and they don't leak, but new ones are recommended of course!!

    I have a leak or two from the rocker covers (and other places!!) so likely yours does too, running forwards over the exhaust clamp.

    Triumphs ARE noisey beasts!

    I have the same speedo issue as you. I found the speedo cable was actually rusted solid near the rear wheel and so replaced the cable - the needle still jumps all over he place, so I guess the speedo is dirty inside. Mine is an import from California so my guess was that it may have dust/sand inside it. But I am not capable to take it apart to find out!!

    Headlight Wiring.jpg
     
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  10. graham kemp

    graham kemp Well-Known Member
    Subscriber

    Mar 1, 2026
    25
    53
    woodley
    th
    thanks for the pic, unfortunately the colours don't match with mine
     
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