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#877048 04/08/22 3:44 am
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1962 6T

I bought this Thunderbird in original condition awhile back and it still runs like new
Not bad for 60 years old
In the process of rehabbing the primary now and should be riding again in a day or two
I live down a mile of gravel and mud but whatever

62 Thunderbird, 72 Daytona, 72 Tiger
British motorcycles on eBay
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Mark Brown #877227 04/09/22 9:54 pm
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Mark,

That is a beautiful machine and an excellent score...welcome to the Triumph Pre-Unit world!!


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project
1971 BSA A65 650 - Project
1972 Norton Commando 750 "Combat"


"Every time I listen to AC/DC, so do my neighbors"

Jon W. Whitley #877236 04/10/22 12:04 am
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I want to thank you, Jon, for the content you've posted that guided me through processes that were new to me. Yeah I love this old girl. She's been my rider while wrenching on my project bikes. The low compression ratio makes her feel like my fast tractor.


62 Thunderbird, 72 Daytona, 72 Tiger
Mark Brown #877881 04/16/22 10:59 pm
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Originally Posted by Mark Brown
I want to thank you, Jon, for the content you've posted that guided me through processes that were new to me. Yeah, I love this old girl. She's been my rider while wrenching on my project bikes. The low compression ratio makes her feel like my fast tractor.

You are welcome, Mark, and glad to be of some help!


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project
1971 BSA A65 650 - Project
1972 Norton Commando 750 "Combat"


"Every time I listen to AC/DC, so do my neighbors"

Mark Brown #880587 05/15/22 12:17 am
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I have recently bought a project 1957 6T it was previously a chopper , so I am trying to put back to as original as possible it has bonnie heads which I think will stay for now .My question , will the timing marks remain the same as on a 6T or would I have to change the timing mark position any differently, meaning long dash or dot on the intake gear wheel ,also what would the valve clearances be as on the bonnie or for a thunderbird .Sorry if this question is in the wrong place I am not sure how to manage this site properly yet


1977 Bonneville, 1972 Triumph Trident, 1957 6T thunderbird
6T1957 #880687 05/16/22 1:01 am
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Hi Rodders,
In my workshop manual (1956-1962) it shows a very detailed description of the valve timing for both engines.
My bike has the wagon wheel stamped version which has the softer cams.
According to the manual, intake valve timing is also retarded by one tooth
My manual is #99-0837 and I must say it is well worth whatever you need to pay for it
I believe Kim the CD Man, has it available on this site
I think the main question would be which cams do you have
Does your engine number have the wagon wheel? Has it been stamped over to denote a cam change?
Kind regards,
Mark


62 Thunderbird, 72 Daytona, 72 Tiger
Mark Brown #880810 05/17/22 6:17 am
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Thanks for your reply Mark , no wheel markings I am going to assume it has standard cams & set it as would be for the T110 - small dot , I have asked a mechanic that done his apprenticeship with a Triumph dealer here in Australia he says that this would be a good place to start 6 & 8 valve clearances with Static Timing 6 Deg BTDC or 0.08 mm piston position BTDC setting fully retarded ( which Honestly sounds way to close but I think it equates to 31 Deg BTDC fully advanced ) will play a bit more & see , but would value your opinion cheers Rod


1977 Bonneville, 1972 Triumph Trident, 1957 6T thunderbird
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Mark Brown #880839 05/17/22 12:53 pm
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Good luck Rod!
Glad to hear you're going to attempt to put it back to original
I'm all for artistic expression (choppers, etc.) but there was a lot of artistic expression in the original design as well
My bike, with the soft cams and low compression ratio is plenty fast and very reliable
Previous owner put a Boyer ignition on it, but I do have the original distributor that I'd like to figure out how to re-install someday


62 Thunderbird, 72 Daytona, 72 Tiger
1 member likes this: 6T1957

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