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Harley Guides

Is an Aftermarket Exhaust Legal in WA?

October 11, 2026 · 1 min read

In Australia, a road-registered motorcycle must keep meeting the Australian Design Rules (ADRs) it was built to, including noise. An exhaust that makes the bike louder than its standard can earn a defect notice.

Choosing a Harley ADR compliant exhaust

Rules and enforcement can change, so check with the Department of Transport WA before fitting. Ask us which systems in stock are sold as road compliant.

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