Frame number

brf1957 · Mar 11, 2012

Hi can anyone identify the year of a Triumph Bonnie frame i have No.61613

Webby03 · Mar 11, 2012

Looks like a 67,

Have a look here http://www.tri-corengland.com/acatalog/ ... ation.html

Webby

L.A.B. · Mar 11, 2012

Webby03 said:
Looks like a 67,

If so then, the frame number should have a DU prefix as well as the model code?

Photos would be useful.

Webby03 · Mar 11, 2012

L.A.B. said:
Webby03 said:

Looks like a 67,

Click to expand...

If so then, the frame number should have a DU prefix as well as the model code?

Photos would be useful.

I just assumed that he didn't bother typing the DU prefix. It must have one, the early numbers don't go high enough.

L.A.B. · Mar 11, 2012

Webby03 said:
I just assumed that he didn't bother typing the DU prefix. It must have one, the early numbers don't go high enough.

Without a prefix, a Triumph "Bonnie" (T120? T140?) frame number 61613 could also be a '74 model T140.

Webby03 · Mar 12, 2012

L.A.B. said:
Webby03 said:

I just assumed that he didn't bother typing the DU prefix. It must have one, the early numbers don't go high enough.

Click to expand...

Without a prefix, a Triumph "Bonnie" (T120? T140?) frame number 61613 could also be a '74 model T140.

I mean the DU prefix, on a later bike the numbers are almost meaningless without the prefix (the prefix indicate the month and year the bike was built)

L.A.B. · Mar 12, 2012

Webby03 said:
(the prefix indicate the month and year the bike was built)

The prefix indicates the 'month' and the 'production season/year' - as Triumph's production period did not run concurrently with the calendar year - so many bikes were built during the preceding year to the one indicated by the year prefix letter.

Webby03 · Mar 13, 2012

L.A.B. said:
Webby03 said:

(the prefix indicate the month and year the bike was built)

Click to expand...

The prefix indicates the 'month' and the 'production season/year' - as Triumph's production period did not run concurrently with the calendar year - so many bikes were built during the preceding year to the one indicated by the year prefix letter.

Yes, I know, build years (depending where you look) run from approximately August to July. My Bonnie for example was built in September 71, but is listed as a 72 model. This is because Triumph would have considered August 71 on as the 72 build year.
Is everyone confused yet ? :mrgreen:

Frame number

brf1957

Webby03

L.A.B.

Moderator

Webby03

L.A.B.

Moderator

Webby03

L.A.B.

Moderator

Webby03

Similar threads