The next 5 characters are the model range and type different codes in either variant. The 9th character is a checksum in the USA variant but relates to the engine configuration in the European variant. The 10th character in the European variant is the final drive ratio.
The last 6 characters are the sequential frame number. The AI frame numbers fill gaps in the AT frame numbers as any machines not already despatched had the I re-stamped to be a T. Triumph Frame Numbers Model Years for specific frame number ranges. All production dates after the number range are approximate. Engine numbers were prefixed with the model e. Engine numbers are just that, numbers, and don't match the VIN. Crooked stampings and unequal depth are common. Frame numbers match the engine number after , but may not have the model designation, only the numbers.
Year and model are stamped as prefix to engine number. Year stamped in engine number prefix with two figures. For example T is a Speed Twin. This practice followed religiously and some single prefixes may appear on postwar models. All other frames were "TF". TR5 models did not have separate number series but ran concurrently with all other models.
In some cases you will have a part number that doesn't have four digits. For example, H You still convert the H to , then just add a zero before the to give you your full 4 digit part number, This is a comprehensive table of Triumph model serial numbers from to Engine and frame numbers should match, as they did when the motorcycle was new from the Triumph factory. If they do not match, that means the frame or engine was replaced sometime in it's history. Contact us - Wishlist Account.
Blog Menu. Where is the Triumph motorcycle engine serial number location? How to read a Triumph motorcycle engine VIN number? Some letters designate certain features, such as: The 'V' denoting a 5-speed transmission, versus the earlier, standard 4-speed gearbox. Tyler Malinky. An avid vintage motorcyclist, Tyler builds and races 's Triumph motorcycles at the Bonneville Salt Flats, in addition to building and riding both stock and custom Harley-Davidson's on the street.
He is also currently building a dual-engine Triumph land speed race bike for the race season. PanAm Oils Inc.
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