Yoshimura R&D of America, Inc.

WR125R 2026 RS-2 Stainless Full Exhaust, w/ Aluminum Muffler

WR125R 2026 RS-2 Stainless Full Exhaust, w/ Aluminum Muffler - Main image
$395.89 $649 In stock

Category: Race Series Exhaust System

Yamaha has brought something new to the market, introducing the new WR125R, a street legal 125 that is a great value in the small bore market and is clearly designed with the intention of having loads of fun.

Packing more performance into this liquid cooled, fuel injected, 6 speed 125cc bike is what we are here for. So our engineers rolled up their sleeves to loose some weight and create more power for this new small bore, and they delivered!

We enlisted our RS-2 off-road muffler to create power for the small bore engine and boy did it! Lighter than stock exhaust by over 4 lbs., while smoothing out the powerband and adding up to 14.7% more hp @7800 rpm and up to 13.3% more torque @7,800 rpm. Now this little 125 can get up and go! This Race Series system comes with a USFS spark arrestor already installed so you can head right out to the wilderness with it.

This RS-2 Race Series system is proudly engineered, developed, and built in Chino, CA.—Yoshimura quality you can count on.

Sound Insert/Spark Arrester Options


Sound Level

Volume Insert Spark Arrestor Included
SA-02-K Yes
INS-11-K No
INS-12-K No
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.6 / 5 · 5 reviews)

Eva ★★★★★

Bolted it on this weekend and the aluminum muffler alone dropped a ton of weight off the back end. The stainless pipes have a deep, throaty note that makes the 125 feel like a proper machine, and the whole thing looks right at home on the WR.

Riley I. ★★★★★

The mid-range punch is noticeably stronger than stock, and the aluminum muffler keeps the weight down significantly. Bike feels more eager to rev out now, exactly what I was hoping for.

Ruby ★★★★★

I was skeptical about the sound at first, but this exhaust gives the WR125R a deep, throaty tone that actually turns heads around town. The weight savings over stock is noticeable too—picking the bike up off the sidestand feels like I dropped a few pounds.