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Free standard shipping on orders over $149
We ship to the lower 48 United States. Orders over $149 ship free; a flat rate applies under $149. Estimated delivery dates are shown at checkout based on item availability and the shipping option you choose.
We text or call to confirm sizing & fitment before we ship.
Every Factory SuperBike order includes a free expert check from real riders. Before we ship helmets and gear, we text or call to confirm your size and fit; for parts, we verify fitment to your bike. This is why we don't have to guess and you don't have to gamble.
Helmet & gear orders: reply to our text to confirm and your order ships, typically same day. No reply within 48 hours and we'll call you. Questions now? Call or text (503) 832-7336.
The Yoshimura Sound Insert Kit is a removable baffle for the RS-3 muffler on the Honda Monkey 125, fitted to reduce exhaust noise.
The Monkey is a bike people ride in places where a loud exhaust causes problems — pit lanes, campsites, city centres, quiet streets at odd hours. It is also a 125, which means the noise a full aftermarket system makes is entirely out of proportion to the speed it makes. The insert lets you have the exhaust without the argument.
It fits from the outlet end and secures with a single fastener, so it can go in or come out in under a minute.
This is a sound insert, not a spark arrester. It reduces noise only and does not meet USFS or BLM spark arrester requirements. Yoshimura sells a separate spark arrester kit (SA-18-K) for the RS-3 on this machine if that is what you need.
Confirm your muffler before ordering — inserts are not interchangeable between Yoshimura canister families.
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