WR125R RS-2 full exhaust: common questions

Will the RS-2 full exhaust fit my 2026 WR125R?

The product is listed for the 2026 WR125R, which is the fuel-injected, liquid-cooled, 6-speed 125cc model Yamaha introduced. The supplied record does not list other model years, so treat this as a 2026-specific fitment unless your dealer confirms otherwise.

What performance gains does the RS-2 deliver?

Yoshimura reports the system is over 4 lbs lighter than the stock exhaust and adds up to 14.7% more horsepower at 7,800 rpm and up to 13.3% more torque at 7,800 rpm, while smoothing out the powerband.

Is the RS-2 a full system or a slip-on?

It is a full exhaust system, not a slip-on. The listing describes it as a stainless full exhaust with an aluminum muffler, so it replaces the complete stock exhaust.

Does it come with a spark arrestor?

Yes. The Race Series system includes a USFS spark arrestor already installed, so you can head straight to the wilderness. The record also lists a volume insert and sound insert options (SA-02-K, INS-11-K, INS-12-K), but specific sound levels are not provided.

Where is the RS-2 made?

The system is engineered, developed and built in Chino, California, by Yoshimura.

What should I check before installing?

The supplied information does not include step-by-step installation instructions or required tools. Before you start, confirm you have the correct gaskets and hardware for your bike, and check your local regulations for race-only or street use. If you are unsure, have a qualified mechanic perform the install.

Product facts: WR125R 2026 RS-2 Stainless Full Exhaust