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RESEARCH&DEVELOPMENT OF AMERICA, INC.

www.yoshimura-rd.com

5420 DANIELS STREET STE A, CHINO CA., 91710 · (800) 634-9166 · (909) 628-4722 · FAX (909) 591-2198

NOTE:  IN THE STATE OF CALIFORNIA, IT IS ILLEGAL TO MODIFY THE EMISSION CONTROL SYSTEM,  WHICH INCLUDES THE CARBURETORS OF ANY VEHICLE.

You must know how to remove and replace your stock exhaust in order to install this product 
otherwise have it installed by a professional mechanic. Keep all stock parts from your existing 
system as some components may be necessary to install your new Yoshimura exhaust depending 
on the application. Read through all instructions before beginning installation. Exhaust system can 
be extremely hot. Let motorcycle cool down before beginning installation. Always wear hand and 
eye protection and take precautionary measures to avoid injury. 

14720BP520   (SS/AL)

AT2 Stainless Steel Slip-On

Street Series

K awasaki   ZX4-RR

Qualified Manufacturer Declared “Replacement Part ”

2023

All Street Series systems are:
• Slip-on/Bolt-on applications that do not require tampering with the vehicle's emissions control system. 
• CARB/EPA tail-pipe emissions compliant.
• Marked with appropriate EPA noise labels.
• Not tested for EPA new vehicle noise compliance. 

Summary of Contents for 14720BP520

Page 1: ...sary to install your new Yoshimura exhaust depending on the application Read through all instructions before beginning installation Exhaust system can be extremely hot Let motorcycle cool down before...

Page 2: ...0BP520 RMA Yoshimura Muffler x1 RACE SPS 1 Medium Exhaust Spring 03019143 Exhaust Clamp x1 ST 200 Spring Puller Tool x1 M8ALCSW 01 M8 Countersink Washer x1 14720 435D Yoshimura Tailpipe x1 x1 M8X40 8m...

Page 3: ...rough the installation steps again If problem still persists please call Yoshimura Tech Department at 800 634 9166 in CA 909 628 4722 7 It is recommended that the muffler and tailpipe be wiped down wi...

Page 4: ...m has gone through a heat cycle of 15 minutes or more Color will vary depending on lean rich conditions Clean using a soft cloth and soap Do not use abrasive materials as it will scratch the surface S...

Page 5: ...nd other fasteners tight as exhaust systems are susceptible to vibration damage 6 If you ride in coastal regions or areas that use salt to control ice and snow wipe the exhaust down after it cools to...

Page 6: ...Yoshimura recommends on all race exhaust systems that all spring joints be safety wired Recommended wire type 304 316 stainless steel with a 032 diameter should be used YOSHIMURA EXHAUST LIMITED WARR...

Page 7: ...nd double check all drawings and instructions 2 Make sure muffler clamps are installed correctly refer to instructions diagram On many models there is a right and wrong way to install Also verify part...

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