| Also known as | E1544 |
| Diagram | Fig. 4 — CYLINDER BLOCK AND HEAD, 6T AND TR6 · ref 15 |
| Subsystem | engine top |
| Listed in parts books | 1960–1962, 1964–1965 |
Bottom collar (to 1965)
Bottom collar for the valve spring on 650 twin cylinder heads, catalog listings through 1965.
This is the bottom collar for the valve spring assembly, part number 70-1544, also known by its earlier code E1544. It appears in the cylinder block and head figures for the 650 twins - 6T, TR6, T120, and T110 - across catalog listings running 1960 to 1965.
Read more
A bottom collar sits under the valve spring at the cylinder head, giving the spring a proper seat against the head casting. It's a small piece but it does real work every time that valve cycles, so it's worth checking condition when you've got the head apart for a valve job or spring swap.
Given the 1960-1965 span tied to this number, if you're working on a 650 twin outside that range it's worth double-checking against your parts book before ordering, since the catalog shows this as the earlier version of the part.
Sorry if we got something wrong here. If you think this information isn't correct, .