Yoshimura R&D of America, Inc.

KLX140/L/G/R/RL/RF 11-26 RS-9 Stainless Full Exhaust, w/ Aluminum Muffler

KLX140/L/G/R/RL/RF 11-26 RS-9 Stainless Full Exhaust, w/ Aluminum Muffler - Main image
$451.87 $619 In stock

Category: Enduro Series Exhaust System

Kawasaki recently revamped the KLX-140 line up of trail bikes, and now Yoshimura has a full system for all three wheel sizes of the mean green trail machine 140, 140L and 140G. This new RS-9 Enduro Series full system not only increases the power, and torque, it reduces weight over the stock system. Unmistakable is the one of a kind look of the RS-9, add to that the legendary Yoshimura exhaust note and it's over!

A laser cut heat shield and a USFS Approved spark arrester is included with this system.

  • Parallelogram-shaped muffler
  • Increased muffler volume over stock system, resulting in better throttle response and improved noise cancellation
  • Light-weight muffler construction with carbon fiber end-cap
  • Reduced weight over OEM system: Yoshimura Full System weight 5.6 lbs vs Stock System weight 6.7 lbs
  • Stainless steel header and tail-pipe
  • Repack Kits, optional Inserts and Spark Arresters are available for all models


Read Cycle Worlds: MNNTHBX Upgrades a Kawasaki KLX140G to Destroy Backroads and Wallets

Sound Insert/Spark Arrester Options

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Sound Level

Volume Insert Spark Arrestor Included
SA-15-K Yes

INS-RS9A-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 (4.8 / 5 · 5 reviews)

Julian ★★★★★

The aluminum muffler shaved off noticeable weight from the stock setup, and the stainless pipes feel solid. Installation was straightforward with the included hardware, and the tone is deeper without being obnoxious.

John V. ★★★★★

Had this RS-9 system on my KLX140L for about two weeks now, and the fitment was spot-on with no modifications needed. The stainless header gives it a deeper, throatier exhaust note compared to stock.

Zoe Y. ★★★★★

Swapped this stainless full system onto my 140G and the weight difference over stock is immediately noticeable on tight trails. The aluminum muffler has a deeper tone without being obnoxious, and fitment on the 140G was spot on with no modification needed.