Yamaha FJR1300 Exhaust Specs and Aftermarket Upgrades

For Yamaha FJR1300 owners, improving the performance and sound of the stock exhaust system is a popular modification.

While the factory pipes are commendably durable, many riders feel restricted by the heavy, overly-quiet stock setup.

The FJR1300 aftermarket offers a range of slip-on and full exhaust replacements to unlock the engine’s potential while amplifying its iconic intake growl.

But are the costs of these upgrades justified for the average FJR rider?

Stock Exhaust of FJR1300

The stock exhaust of FJR1300 weighs ~20 pounds and produces a peak horsepower of 127 hp.

The stock exhaust system is made of stainless steel, it’s durable but heavy.

Each cylinder of the FJR1300 gets two intake and two exhaust valves made from durable steel.

Riders who feel that the stock exhaust is not as free-flowing usually opt for aftermarket upgrades.

Aftermarket Exhaust Upgrades

You can fit a 4-into-1 exhaust system on an FJR1300 to reduce the weight. They are also cheaper than the stock exhaust system of the FJR1300.

Slight gains in horsepower can be achieved through upgrades.

Two Brothers Exhaust for FJR1300

Constructed using premium materials like carbon fiber, aluminum, or titanium for the cans, the Two Brothers exhaust system aims to provide unmatched performance and sound.

It utilizes a CNC-machined black Teflon-coated magnesium end cap along with CNC-machined inlet and outlet openings for precise manufacturing tolerances.

Within the exhaust can, a spiral-wound perforated core allows for optimal airflow and reduced weight.

Combined with the lightweight build and precision components, the Two Brothers exhaust delivers unparalleled acoustic properties for riders seeking a deeper, more aggressive exhaust tone.

The exotic materials withstand high temperatures for durability while giving customized style.

StockTwo Brothers systemDifference
Peak HP127 hp130.5 hp+3.5 hp
Weight20 lbs9 lbs-11 lbs

Yoshimura Exhaust for FJR1300

It’s a stainless steel slip-on system (does not replace the entire stock exhaust) for 2013-2022 FJR1300 models.

Claimed to be CARB/EPA compliant for emissions and noise. Has appropriate EPA labels.

  • Includes left and right slip-on mufflers, left and right tailpipes, various mounting hardware, heat shields, and necessary clamps.
  • Do not use the stock exhaust gaskets when installing.
  • Claims to provide less restriction, increased airflow, and changes to power delivery and engine sound.
  • Installation requires drilling a hole in the left header to secure the tailpipe from rotating.
  • Weighs about 100g less than the stock muffler assembly. Packing inside will need replacement over time.
  • Comes with a 1-year limited warranty against defects when registered. Requires proof of purchase and waiver to make claims.
  • Yoshimura recommends periodic cleaning and polishing to retain its appearance.

Delkevic Exhaust for FJR1300

  • Comes with all necessary gaskets for installation, free of charge
  • Road legal for use in the UK
  • Not guaranteed for suitability or regulatory compliance if used outside the UK
  • Covered by a 5-year guarantee from Delkevic
  • Does not require rejecting or ECU remapping after installation
  • Uses a removable discreet baffle system
  • Each silencer weighs 1.72 kg
  • Noise level is 98-100 dB static at 60% RPM with baffle installed

Cost vs Performance

The Yoshimura slip-on system ranges from $500-$1000 while the Delkevic full system likely costs $800-$1500.

For the Yoshimura, you gain modest performance improvements thanks to decreased restrictions and increased airflow.

The Delkevic offers even greater gains being a full system replacement.

However, the cost is high if you merely want an aggressive exhaust tone.

The cheaper Yoshimura delivers a throatier sound while meeting noise regulations.

Both feature high-quality materials and construction for durability along with attractive aesthetics.

For UK riders, the Delkevic guarantees legality, unlike the Yoshimura.

Minor slip-ons suit those prioritizing style and noise whereas full systems deliver measurable performance at a greater cost.

Compliance With Emission Regulations

FJR1300 meets the EU4 emission regulations.

FJR1300’s exhaust system uses a ‘closed loop’ system to reduce the emissions from the motorcycle.

The motorcycle uses a ‘heated oxygen sensor’ to sniff the excess gases and adjust the air/fuel ratio.

Yamaha developed their Fuel Injection system so that the emissions are minimal. FJR1300’s fuel injection system has been discussed in detail in the article FJR1300 engine specs.

Dual, three-way catalytic converters help reduce the emissions.

Models that were produced prior to 2007 don’t meet the requirements of EU3 regulations.

The FJR1300 might not meet European regulations but it continues to thrive in the U.S., thanks to the lenient laws.

Cost vs performance – Budget-friendly slip-ons vs full race systems. Is the expense worth the gains?


When reviewing FJR1300 exhaust offerings like Yoshimura and Delkevic, deciding between budget-friendly slip-ons or full race systems means balancing performance gains against upfront costs.

For many riders, the increased power and aggressive sound produced by affordable muffler replacements sufficiently enhance the riding experience without breaking the bank.

Full system upgrades extend those benefits further still—yet primarily appeal to competition-focused riders willing to pay a premium.

Ultimately, analyzing your needs and budget determines the package providing the best fit.

But whether chasing lap times or simply an improved exhaust note, quality aftermarket add-ons stand ready to unlock the FJR1300’s potential.

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