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Unrecorded engine number

Submitted by christian_wyss on Fri, 30/11/2018
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Hello,

Recently saw an unknown engine number, even in the records. Engine is a Manx or Inter and have this number G10T 45XXX.

Does somebody knows what the T stands for?

Thanks

Christian

Submitted by christian_wyss on Fri, 30/11/2018

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... Well after a nice phone call with Stu Rogers, he told me that it just stands for Trial and the only difference with a road or race bike would be a low compression piston.

Christian

Submitted by richard_cornish on Fri, 30/11/2018

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Hi Christian,

The letters and numbers are G = 1952, 10 = 350cc International, T = trials. I think there were some special ISDT featherbed works machines built that year, so it couldpossibly be one of those or could be a one-off for a favoured rider or dealer. This engine would possibly have milder cams for low speed torque, perhapsto the CJ profiles.

Regards, Richard.

Submitted by roger_deadman on Sat, 01/12/2018

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Hi Christian

I have been looking through a letter from Peter Roydhouse ,i cant find a G10 T but for 1953 there is a H10 T which refers to a 350 ohc ISDT sidecar outfit i hope this is of interest

Regards Roger

Submitted by christian_wyss on Sat, 01/12/2018

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Hi Richard and Roger,

Thank you for your inputs. It's always interesting to talk with passionate people.

I got some new stuff from Michael Rettie, in fact Norton records data sheet.

I found the H10T in it.

And just as you Roger, no G10T.

But, might be a bug in those records, because for a 1951 500T stamped F3T, the records shows G3T.

What do you think about that?

Regards,

Christian

Attachments NOC%20%20%20Register%20%20%20H10T.jpg noc-register-g3t-kbm611-2-jpg

Submitted by richard_payne on Sat, 01/12/2018

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The beginning of September, after the works returned from the summer break was traditionally the point where production of the following year's models started. It's not hard to imagine that a clerk who had started writing 'G' slipped up when a special build that had been held up in the comp shop came along the line.

Prior to WW2, when frame and engine numbers were not matched, spare engines were taken from stock and bore a number from the sequence in the engine book. However, with the matched post-war numbers, this cannot have been the case.

I think that you have to submit the engine number to the NOC and ask what details the factory records show for it. Dealer and other specifications may give a clue as to whether it had a 'T' originally.

 


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