Yoshimura RS-3 Stainless Slip-On Exhaust with Stainless Muffler | Honda Monkey 125 2019-2021

The Yoshimura RS-3 Stainless Slip-On Exhaust is a bolt-on muffler for the 2019-2021 Honda Monkey 125, built around an oval stainless steel RS-3 canister that mounts to the stock header with no ECU remapping required.

The Monkey's factory exhaust is heavy and heavily restricted, and on a 125cc single that restriction costs proportionally far more than it would on a larger bike. A slip-on is the accessible way into that gain — it captures much of the character and weight saving of a full system without the outlay, and it can be fitted in the time it takes to have a coffee.

The RS-3's oval profile suits the Monkey's proportions better than a large round canister, keeping the bike's deliberately compact look intact. Stainless construction stands up to the weather better than aluminium on a machine that tends to live outside.

• Bolt-on slip-on muffler — retains the stock header
• Oval stainless steel RS-3 canister with maximized internal volume
• Straight, single core baffle
• Low-volume sound insert capable
• Bolt-on installation with no ECU remapping required
• Weight reduction over the heavy stock muffler
• Yoshimura part number 960-1272
• Made in the USA by Yoshimura R&D of America

Fits the 2019-2021 Honda Monkey 125 as a direct bolt-on to the stock header, and is the usual first modification on a Monkey alongside a fender eliminator. Riders wanting the full gain should look at the RS-3 full system instead, which replaces the restrictive stock header as well.