Triumphrat

robmac · 05-05-2008

Looking for assistance:
I have just bought a Triumph 1970 Bonneville which has an engine and frame number of: GD 53136 T120R
Can anyone explain to me why the number starts with a GD whereas all reference to engine numbers I have seen in the past have started with DU?

Much obliged
RobMac

quagmire · 05-05-2008

Starting with the Unit construction engines in 1963, Triumph used the prefix DU for all it's 650cc engines. halfway thru 1969 Triumph change over to a different system of numbering the month and year using different prefix's.

The "D" stands for 1970 and the "G" refers to the month of June.

Here is a good link to explain the numbers.

http://www.t140.com/serial/

Paul, this might be a good link to post as a sticky above.

robmac · 05-05-2008

Many thanks Quagmire...that answers my query....will have a look at that link as well!
Regards

quagmire · 05-05-2008

Oh I forgot to tell you Rob, we have a thing for pictures in this forum. As payment for my excellent advise, I will reguire at least one picture of your Bonnie posted here!