Yoshimura R77 Full Exhaust for FZ/MT-07: What to Expect
By Yoshimura R&D of America, Inc. | Published: 2026-10-27
Category: Product Reviews
Thinking about a Yoshimura R77 full system for your Yamaha MT-07 or FZ-07? Here's what to expect in terms of sound, power, fit, and installation quirks.
Quick answer
The Yoshimura R77 full exhaust for the FZ/MT-07 delivers a deeper, more aggressive sound and a noticeable mid-range power bump, but the full system install requires patience with the spring hooks and mid-pipe alignment.
Sound character and volume
The R77 muffler uses a trapezoidal can that packs more sound-dampening material than a straight-through design, so the tone is deep and throaty rather than harsh or raspy. Expect a moderate increase over stock at idle and a strong bark under hard throttle, but it's not obnoxious for daily riding. If you want a quieter option, the R77 still lets you run the included silencer insert.
Power delivery and tuning
Yoshimura developed the R77 in racing, so the full system is tuned for mid-to-high RPM gains. On the CP2 engine, you'll feel a stronger pull from 4,000 rpm up to redline. The bike will run lean without a fuel controller, so Yoshimura recommends a Power Commander or ECU flash to get the full benefit and avoid a flat spot. Without tuning, the bike remains rideable but won't deliver the advertised performance.
Fitment notes for different models
This system fits the FZ-07 (2015-2017), MT-07 (2018-2026), R7, and XSR700. The mid-pipe and muffler mount use the stock hanger, so no bracket modifications are needed. However, the spring hooks on the mid-pipe joint can be tight; a spring puller tool helps. Some riders report the carbon end cap can discolor over time from heat, which is cosmetic and does not affect performance.
What to check before and during install
- Symptom: You want a louder, more aggressive exhaust for your FZ/MT-07, R7, or XSR700, but you're unsure about fitment, tuning needs, or installation difficulty. Know your bike's year and model variant before ordering.
- Likely cause: The full system replaces the entire exhaust from header to muffler, so it changes backpressure and air-fuel ratio. Without a fuel controller, the ECU may run the engine lean, causing a flat spot or popping on deceleration. Plan for a Power Commander or ECU flash to avoid lean running.
- Corrective action: Install the system per Yoshimura's instructions: apply anti-seize to the header nuts, loosely fit all joints before tightening, and use a spring puller for the mid-pipe springs. After install, check for exhaust leaks at every joint and verify the muffler doesn't contact the swingarm or rear shock. Test ride briefly and re-check bolt torque after the first heat cycle.
- When to stop or choose another option: If you cannot add a fuel controller or ECU flash, or if you need a strictly street-legal system with a catalyst, this race-series exhaust is not the right choice. Consider the Yoshimura RS-4 or AT2 street-legal options instead. This is a race system; it does not include a catalytic converter.
Product highlights
- FZ/MT-07/R7/XSR700 15-26 R77 Full Exhaust / Carbon Muffler: The R-77 muffler's front cap is MIG-welded, while the end cap is riveted using high-end 304-L stainless steel. This construction gives you a durable, race-inspired look without the premium price of a full titanium system.
FZ/MT-07/R7/XSR700 15-26 R77 Full Exhaust / Carbon Muffler
