Yoshimura has introduced a new R-77 Street Series slip-on exhaust for the Kawasaki KLE500, giving riders of the adventure twin a titanium-style upgrade that cuts weight and boosts mid-range power, according to product specifications released by the manufacturer.
Yoshimura R-77 Specifications and Dyno Gains
The aftermarket system features Yoshimura’s signature trapezoidal muffler profile constructed from stainless steel. According to Yoshimura’s dyno data, the R-77 delivers a modest output bump, generating gains of 1.8% in horsepower at 6,600 rpm and 3.9% in torque at 5,000 rpm compared to stock configurations.
Weight reduction marks a primary advantage of the new component. The stock muffler weighs 9.6 pounds, while the Yoshimura R-77 tips the scales at 6.8 pounds. This swap trims 2.8 pounds from high up on the motorcycle’s chassis, aiding overall handling.
Did You Know? The R-77 muffler utilizes Yoshimura’s proprietary Works Finish, a chemical treatment that causes the stainless steel to develop a vibrant, titanium-like coloration as it goes through regular heat cycles on the road.
Exhaust Sound Levels and Compliance
Sound output shifts noticeably with the new installation. Measured using the J2825 5,000 rpm test standard, the stock muffler registers 84.5 dB. By comparison, the Yoshimura R-77 climbs to 92.1 dB, providing the KLE500 with a deeper and more assertive tone on the trail or highway.
Because it belongs to Yoshimura’s Street Series lineup, the slip-on installs as a direct bolt-on system that requires no alterations to factory emissions components. According to the manufacturer, the package includes a USFS-approved spark arrestor, is made in the USA, and carries a one-year limited warranty.
Pricing and Additional Accessories
The Yoshimura R-77 Stainless Slip-On for the KLE500 carries an MSRP of $669 and is currently available as a pre-order item, with direct inquiries handled through Yoshimura’s customer service channels. Riders aiming to further modify the machine can pair the exhaust with a recently released fender eliminator kit and streamline LED turn signals from the same brand.
Frequently Asked Questions
Does the Yoshimura R-77 require an ECU tune on the Kawasaki KLE500?
How much weight does the R-77 save over the stock exhaust?
According to Yoshimura, the R-77 weighs 6.8 pounds compared to the factory muffler’s 9.6 pounds, resulting in a total savings of 2.8 pounds.
Is the spark arrestor included with the system?
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