Parts for Builders: Acme Oil Caps

If you're building a bike from scratch, there's two ways to do it: make everything, or make everything better. We prefer the latter, and to help you in that regard, we've created these great threaded caps with pre-fabbed bungs. Sure, you might be able to make something like these yourself, but why? We did the detail work so you don't have to.

We offer our caps in three finishes (brass, black ano, polished) and three styles: smooth (above),

knurled (above),

 and spiked cog style (above)

All three versions feature clean internal venting, shown here on the bottom and side of the black threaded cap. A machined recess with O-ring provides leak-free function and performance.

Each cap comes with a matching threaded steel bung for welding into whatever oil bag you're building. When finished, our caps give your hand-made oil bag or gas tank a clean, pro appearance that says, "Check me out—I know what I'm doing." For more info, click here.