Yoshimura R&D of America, Inc.

1090/1190/1290 Adventure RS-4 Stainless Slip-On Exhaust, w/ Stainless Muffler

1090/1190/1290 Adventure RS-4 Stainless Slip-On Exhaust, w/ Stainless Muffler - Main image
$507.54 $769 In stock

Category: Street Series Exhaust System

In the world of Adventure bikes, KTM big bore bikes are held in very high regard. KTM 1290, 1190 and now with addition of the new 1090, the orange brand is aiming high at filling every desire of the adventure rider.

For those that want to compliment these three KTM machines, Yoshimura has developed an RS-4 slip-on that delivers in every area that an adventure rider would desires - power, sound and looks. The power that the RS-4 provides is second to none, delivering a 3.1% max gain in horsepower and a 2.7% max gain in torque. The sound the RS-4 provides is throatier, and with over a 5 lbs. weight loss, acceleration and throttle response has been improved dramatically. Finished off with Yoshimura's own Works Finish and you have a winner!

Included with each RS-4 is a sound insert. Optional spark arrester (SA-17-K) is available separately.

Proudly made in the USA!

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Customer Reviews (4.6 / 5 · 5 reviews)

Timothy ★★★★★

The deep tone from the stainless muffler is noticeably richer than stock, and the weight savings make a real difference when filtering through slow corners. I've put about 500 miles on it so far without any fitment issues at all.

David ★★★★★

The installation was straightforward, and the stainless muffler feels solidly built—no rattles or cheap welds. Sound is noticeably deeper at idle but doesn't drone on the highway, which is exactly what I wanted for long trips.

Avery A. ★★★★★

The deep, throaty tone is exactly what I wanted for my big bore bike, and the stainless finish has held up perfectly through a few muddy trips. The muffler is lighter than the stock unit too, which I really appreciate on rough trails.