| Also known as | T1719 |
| Diagram | Fig. 11 — CLUTCH AND PRIMARY CHAINCASE · ref 29 |
| Subsystem | primary |
| Listed in parts books | 1964–1972 |
Centre (Shock absorber body) 3TA, T90, T100
Clutch center / shock absorber body for the primary chaincase, listed for the 3TA, T90, and T100.
57-1719 is the clutch center, also called the shock absorber body, from the clutch and primary chaincase assembly. The catalog places it in the clutch and primary cover figures, which is where this piece lives on the bike — inside the primary chaincase, as part of the clutch hub that carries the shock absorber springs.
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The canonical description ties this part to the 3TA, T90, and T100 models, and the catalog appearances run from 1970 to 1972. If your parts book uses the older T1719 designation, that's the same physical piece under its legacy letter-prefix number.
Because a clutch center sits at the heart of the primary drive, it's worth checking your existing hub and spring setup before ordering to make sure the shock absorber components you're pairing it with match up. Call the shop if you're not sure which version your bike takes.
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