Customer Service (503) 832-7336
The Only Place For People Who Ride


Couldn't load pickup availability
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 RS-4 Slip-On is a bolt-on muffler with a stainless steel midpipe, an aluminum canister and a carbon fiber end cap.
The RS-4 is the canister that defined Yoshimura's off-road range for the better part of a decade. It was the standard fitment on the bikes that won championships before the RS-9 and RS-12 arrived, and it remains the correct part for the machines built around it — a later canister is not a substitute for the application it was designed for.
The aluminum body is the reason it lasted. It is light, it is repackable, and it can be serviced through a normal season rather than thrown away when the packing burns out.
Confirm fitment before ordering. This listing arrived from the distributor feed without a verified application, and we will not publish a make, model and year range we cannot stand behind. Check part number 961-4412 against Yoshimura's application chart, or contact us and we will confirm it for your bike. Check the sound and spark arrester requirements for the land you ride.
Thanks for subscribing!
This email has been registered!
| Product | SKU | Description | Collection | Availability | Product type | Other details |
|---|