| Diagram | Fig. 2 — CRANKCASE · ref 49 |
| Subsystem | engine bottom |
| Listed in parts books | 1980 |
CRANKCASE TS/DS
Triumph crankcase (TS/DS) from the 1980 catalog listing, the main casting housing the crankshaft and bottom-end bearings.
71-7401 is a Triumph crankcase, listed under the CRANKCASE figure in the parts books. The catalog description shorthand reads TS/DS, which points to a specific crankcase casting variant rather than a generic bottom-end housing. The crankcase is the main structural casting that carries the crankshaft, the main bearings, and the timing-side and drive-side running gear, and it's the piece everything else in the bottom end bolts to or seats inside of.
Read more
Our catalog record for this number only shows the one appearance, tied to the 1980 model year. We don't have additional detail beyond that single listing, so if you're matching this against an engine, it's worth double-checking the casting numbers and any adjoining crankcase half against what you're working on before you commit to ordering.
Given how few catalog rows this part number touches, call the shop and we'll confirm fitment and mating parts before you order.
We've never carried this one. Tell us what you're after and we'll go looking — you'll get a price and photos before you commit to anything.
Sorry if we got something wrong here. If you think this information isn't correct, .