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I was perusing EBay (US) for Bonnies, and this one is currently active.

https://www.ebay.com/itm/334414979911?hash=item4ddcafa347%3Ag%3AG3QAAOSwuhBiYxb6&LH_ItemCondition=3000%7C2500

I've attached a screen shot of the block stamping. Is this a legit number for a 69? The format seems wrong. Also, it seems the bike has had cosmetic work, but nothing done to the motor, especially for its current price.

69 Bonnie.jpeg
Triumphs on eBay
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GC prefix is June 1969, the numbers look reasonably Kosher stamped against the Triumph logos. Very pretty machine, possibly the best year!

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https://www.ebay.com/itm/334414979911

looks like a good engine stamp ,
Seller does not disclose if frame matches , or did i miss that ?
....
In 1969
Triumph introduced a new system of numbering engines and frames.
There are two letters ... a five digit number... and a model designation.
The first letter represents the month,
the second the model year,
numbers for each year start at 00100

model years are approximate ,
with production starting sometime in August and running through July

G is for june
C is for 1969 and 20,000 seems a fair number of a june t120 engine ? ,
considering Triumph was producing around 900 bikes a week
and make over 40,000 bikes in 1969 .

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Thanks to all. Not that I could afford the price of the current bidding, but it did look like a nice bike - except the lack of a crank-up rebuild on an older machine is a bit worrisome. I agree 69 and early 70 (up until they started the leaf spring thing) are mechanically at least, probably Triumph's best years in some ways.

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That number looks good to me, one of a large batch of T120Rs numbered approx EC 20XXX to HC 233XX.


1958 5TA / T100
1965 T120R
1970 TR6
1970 TR6C
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What is the strange short bar clamped to the handlebars over the throttle?


[Linked Image from i.postimg.cc]


Bill B...

Last edited by Boomer; 04/28/22 6:40 pm.

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Cruise control.
Thumb actuated cam to hold throttle grip in position.


1970 T120R - 'Anton'
1970 Commando - 'Bruno'
1967 T120R - 'Caesar'
1968 Lightning - 'Dora'
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As Hugh says.

It's a primitive form of "cruise control."

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Just had a look at my T120 engine number BC111##. The number illustrated above, while not identical, is consistent with mine. I took into account the font, the layout, the staggered numbers and the positioning of the stamps on the number pad. The numbers in the picture look as if they were stamped by hand one at a time. Just as mine do.

Last edited by sammysnail; 04/29/22 1:59 am.

1954 Norton Dominator 88 cafe - Yamaha wheels, Lyta tank ( project in progress)
1969 Triumph Bonneville
Currently 6 other non-Brit machines.
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Could be a stamped set of new cases from a dealer at some time.

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Originally Posted by Boomer
What is the strange short bar clamped to the handlebars over the throttle?


Bill,

Just like you, I have never seen such a thing like this attached to a British bike!


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"


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thats a vanda cruise, a cruise control of sorts sold in the 1970s. i had one for a while.

it consisted of a friction collar you attached around the throttle barrel, a fixed mounting bracket on the bsrs, and a bar spanning tbe two.

there was a little toggle on the collar that you flipped with your thumb, tightening the rubber indide the collar and holdinf the throttle at that position.

you could override the friction at any time if you forgot to un-toggle in an emergency.

the advantage of the vanda cruise was that you had an ordinary throttle until you flipped the lever, unlike the AMAL friction plate, which worked both ways. a disadvantage was that the ftiction collar was bulky and positioned your hand awsy from the other conttols.

cost about US$25, pretty expensive back then.


i'm old enough to remember when patriotism meant not trying to overthrow the government.
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Stampings look original, the date code and numbers are stamped individually, the T120 is a single stamp and the R is added on after. See the below link (scroll to engine portraits at the bottom). Sammysnails T120 is from a batch of T120s approx AC 101xx to BC 127XX (can you confirm T120 not T120R?):

https://triumph-tiger-90.com/downloads/


1958 5TA / T100
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1970 TR6
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contacted the seller
He responded with
some extra pics ( not posted in the ad )

said bike is not currently road licensed , title is in his name
and
frame , engine and title ... all match

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Winning bid - $11,400.00.

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Originally Posted by tiger_cub
Sammysnails T120 ..... (can you confirm T120 not T120R?):

T120R, tiger.


1954 Norton Dominator 88 cafe - Yamaha wheels, Lyta tank ( project in progress)
1969 Triumph Bonneville
Currently 6 other non-Brit machines.
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Originally Posted by sammysnail
Originally Posted by tiger_cub
Sammysnails T120 ..... (can you confirm T120 not T120R?):

T120R, tiger.

T120R is a Bonneville. TR6R is a Tiger. TR6C is a Trophy.


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