1964 T120C

[biagi]

I have a 1964 T120C which in that year was delivered as either a TT or Competition Sport. As this bike is somewhat apart and old and adulturated, I'm wondering if anyone is aware of more difinitive records or telltale signs which might help me figure the correct model of this bike T120C (DU7766). Thanks - Larry - P.S. This is a U.S. bike.                

[L.A.B.]

The Competition Sports model would seem to have been fitted with lighting equipment, speedo, exhaust pipes with silencers (mufflers) that the 'TT' version would not have had. The Competition Sports I think would have had painted steel mudguards (fenders), the TT mudguards would have been polished alloy.

I seem to have found some conflicting information regarding these models?? 

[TBS]

Larry, the first East Coast TT Special was T120C DU 7734, the first Eastern coast Bonneville scrambler T120C DU 6795. However there are a lot of differences between the TT and the C. What is the size of the carb adaptors?
Try the VMCC who now hold all the Triumph records.
When you decide which model you have I can give you advice on the parts you require.



restorer@thebikeshed.net

[larry biagi]

the libarian at vmcc advised me that C denotes the bike as a scrambler, but knowing that there was more than one model designated by that C in 1964 I'm hoping for someone with  a more difinitive answer to DU7766's origin. the vmcc suggested I contact Triumph Corp. but it's my understanding that the group no longer exists? thanks - Larry

[TBS]

Re my post:
 "What is the size of the carb adaptors?"

[biagi]

tbs - the carb adaaptors appear to offer the 1-3/16 choke on the carb side. this motor is apart, has two heads that came with it one of which has adaptors for a pair of dellortos. I'm not sure that I can figure these heads to be originals as I believe that the previous owner may have raced this bike. One certainty is that   the headlamp and tailamp appear to be afterthoughts as they do not have the proper ears up front and an improper tailamp altogether at rear. However,   the previous owner may have removed or replaced pieces over the years. This is why I am hoping there exists a list somewhere that might indicate which model T120CDU7766 actually was. Thanks - Larry

[L.A.B.]

I believe the TT models originally had an energy transfer ignition system, is there any evidence of this?

[biagi]

L.A.B. I think you have it there as I believe that this bike has the E.T. system still on the frame. Thanks for all your help. Larry

[TBS]

TT
New cylinder head E5727 allowed larger carb adaptors with 1, 3/8 threads. Gearbox sprocket would be 18 tooth. Front tyre should be 3.50. Pistons 11.2:1.
Et system was also used on the TR6R, but the machine could have been scrambled and things changed around. Have you got the log book, was it imported from the US?

[L.A.B.]

Have you got the log book, was it imported from the US?

I get the impression that the bike (and Larry) are in the US?

It does help if people can say WHERE they are in the world? This can save much confusion and also gives a lead as to what terminology will be understood (petrol/gasolene, paraffin/kerosene, mudguard/fender etc.) and where to locate parts.  

[biagi]

TBS - My apologies. As LAB correctly thought I and the bike are in the US. The motor is out of this bike and apart with what internals I have mostly in boxes. Frame and engine numbers do match T120CDU7766 and as I have been unable to find any definitive list available I will presume that because an ET system is still attached to the frame, that this  bike was probrably sold as a TT. Thanks - Larry

[TBS]

If you have the title document (log book) it has the name and address of the previous owner, so you can find out more history about the machine.

[biagi]

The previous owner has passed away and I'm guessing that's why the bike went up for sale. Records of ownership are available through the state at a cost but I'm betting that their paperwork probably does'nt detail the model specs. Thats why I was hoping someone might have a more detailed list from Triumph. I shall probably rely on telltale features (ET ignition, Lucas 555 killswitch) and parts numbers I discover as the bits come out of the boxes. Thanks for your help - Larry

[ackey]

1964 was the second year of the true tt 's they
have inch and 3/16 amal monoblock carbs with a one peice air cleaner assy.also no headlights or taillights
although most  were fitted by owners.both front
 and rear mudgaurds are alloy.also has energy transfer ignition.there was no double downtub
exhaust until 65 thats why 64is really a scramber
one pipe up high on each side.colors are gold with alaskin white.seat is black with white  pipeing.i should know i own one SERIAL NUMBER T120C DU10538
hope this helps

[TriSpec]

Larry,

>Frame and engine numbers do match T120CDU7766 and as I have been unable to find any definitive list available

The numbers alone don't tell the story as machines were numbered sequentially irrespective of model. When Triumph closed down their records were deposited with the Science Museum in London but when they wanted to get rid of them a couple of years back they went to the VMCC. So the VMCC, where you started your queries, should have the answer you require.

Regards, Peter C.