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Shop/Category/Fig. 4 — CYLINDER HEAD AND ROCKER BOXES/"O" ring, D.S. bush
"O" ring, D.S. bush
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Also known asE3548
DiagramFig. 4 — CYLINDER HEAD AND ROCKER BOXES · ref 21
Subsystemengine top
Listed in parts books1971

"O" ring, D.S. bush

An O-ring for the D.S. bush in the cylinder head and rocker box assembly, sealing against oil seepage at the top end.

PN · 70-3548

This is an O-ring used with the D.S. bush in the cylinder head and rocker box assembly. It seats around the bush to keep oil where it belongs as it moves through the top end of the engine, rather than seeping out past the fitting.

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The catalog shows this one appearing in a single listing tied to 1971, and it's filed under the legacy number E3548 if you're working from an older parts book. It's a small item but worth replacing whenever the bush or head is off the bike, since an old, hardened O-ring is a common source of a top-end oil leak that's otherwise hard to track down.

We don't have more detail on this one beyond its place in the cylinder head and rocker box figure, so if you're not sure this is the exact seal your bush needs, give us a call and we'll confirm before you order.

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