| Diagram | Fig. 2 — CRANKCASE · ref 7 |
| Subsystem | engine bottom |
| Listed in parts books | 1960–1962, 1964–1965, 1967 |
Breather disc
A crankcase breather disc used in the engine's pressure-relief breathing setup.
GS87 is a breather disc, part of the crankcase area on the engine. It shows up in the crankcase section of the parts books across a run of years in the 1960s, which tells us it's a component the factory carried for a good while without major change.
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A breather disc like this one works with the crankcase's timed breathing system, helping the engine relieve internal pressure as it runs. It's a small, easy-to-overlook part, but if it's cracked, warped, or missing, you can end up with oil weeping past seals that otherwise look fine.
Our catalog record doesn't tie this one to a specific model, so if you're matching it up to a rebuild, bring in your old part or give us a call and we'll confirm fitment before you order.
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