T100R Engine/frame number query

Hi all,

I have a late T100R Daytona with matching engine & frame numbers with the prefix NH, dating the bike to October 1973 . The numbers are good & have not been messed with, including the engine number still having it's clear Triumph logo stampings underneath.

However, according to all the available information I can find, the 1973 model year (H) ran from August 1972 (JH prefix) to June 1973, (GH prefix). The 1974 model year (J) then ran from June 1973 (GJ prefix) to October 1973 (NJ prefix). So, unless I'm missing something quite obvious (which is more than possible.!), my bike appears to sit beyond the 1973 model year cut off but before the 1974 one started.

If anyone has a better understanding than me of how to make sense of this, I would be most grateful. Is this sort of anomaly common with Triumphs of this era? Essentially, I would like to know if the bike is a 1973 or 1974 model year bike.


Cheers all, Deano.

Deano said:

I have a late T100R Daytona with matching engine & frame numbers with the prefix NH, dating the bike to October 1973 .

However, according to all the available information I can find, the 1973 model year (H) ran from August 1972 (JH prefix) to June 1973, (GH prefix).

Click to expand...

Yes, so production of the '73 year models began at JH (August '72), then KH (Sept. '72) then NH (Oct. '72) as the second letter is the model year not necessarily the calendar year it was built.

According to SOME people, the exact "cut-off" dates were not always a particular day, of a particular month, of a particular year, for a particular model.

I am neither agreeing, nor disagreeing with this claim; however, there are many people who definitely AGREE with it, and many people who definitely DISAGREE with it!

I must also throw in this: the Norton factory, and the Triumph factory did things differently, probably more often than they did things the same.

grandpaul said:

According to SOME people, the exact "cut-off" dates were not always a particular day, of a particular month, of a particular year, for a particular model.

I am neither agreeing, nor disagreeing with this claim; however, there are many people who definitely AGREE with it, and many people who definitely DISAGREE with it!

Click to expand...

Quite so, however, the 1973 (500cc) model year began at JH (15597) (approx.) August 72, and ended at DH (31460) April '73, so NH is 1973 model year, build date October 1972.

1974 (J) model year 500cc production commencing from HJ 56408 (July 73).

Thanks for the replies, much appreciated. It looks like I will need to get a 1973 parts list then.!

cheers.!

(USA Edition)

Thank you for the link, that’s excellent.!