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Dear Yoshimura Customer, 

Congratulations and thank you for purchasing a Yoshimura Exhaust System.  Over six decades of experience in research 

and development, state of the art machinery, materials and craftsmanship of the highest quality all come together in a 

product of exceptional quality and performance—in other words, this is the best thing you can put on your bike. 

We strive to provide you with a product perfect in fit and finish.  However, if you have any problems, please give us a 

call.  We have found that most fitment issues can be easily resolved by a conversation with one of our knowledgeable 

and friendly staff.  If the issue cannot be resolved this way, our warranty evaluation program may be the answer.  Please 

take a moment to review our recommendations for the care of your exhaust and our warranty information. 

 

PLEASE NOTE:

 If you have any doubts about your exhaust: 

DO NOT START THE MOTORCYCLE! ONCE AN EXHAUST HAS 

BEEN USED OR MODIFIED, IT CANNOT BE RETURNED FOR CREDIT OR EXCHANGE. 

  

 

EXHAUST SYSTEM MAINTENANCE 

Yoshimura Exhaust Systems require very little care and maintenance; here are a few tips: 

1.

 

Use mild car/motorcycle soap to clean the exhaust system—do not use any abrasives or degreasers. 

2.

 

Clean your exhaust with metal/stainless polish every 1-2 months to retain the luster and remove dirt and grime. 

(DO NOT USE POLISH ON “WORKS FINISH” SYSTEMS) 

3.

 

Avoid contaminating exhaust surfaces when hot. 

4.

 

4.Your exhaust system will change color (blue, magenta, purple, and/or gold) due to heat; this is normal. 

5.

 

Keep all clamps, bolts and 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 

remove any possible salt residue, which can result in rusting. 

7.

 

If you are storing your motorcycle for the season, wipe the exhaust system down with rubbing alcohol before 

storage. 

8.

 

Head pipes glowing (visible in normal light) may indicate an excessively lean condition that must be corrected. 

 

CARBON FIBER: 

Carbon fiber equipped exhaust components require special attention. The following addresses wear issues directly 

related to carbon fiber: 

1.

 

Keep all clamps, bolts and other fasteners tight.  Carbon Fiber is very susceptible to vibration damage. 

2.

 

Keep all chemicals and solvents away from the carbon fiber, as they will damage the finish. 

3.

 

High temperatures will cause the resin in the carbon fiber to break down. Visual signs such as an amber hue in the 

resin may be early signs of heat damage to carbon fiber. 

4.

 

Upon seeing amber colored resin, discontinue use. The exhaust system needs to be inspected by a representative 

from Yoshimura, for repack, and/or repair. Continued use will cause component failure. 

 

STAINLESS STEEL: 

Stainless Steel is not rust proof but is less prone to rusting, staining and pitting; but it is prone to oxidation like all 

metals.  

 

WORKS FINISH: 

1.

 

Works Finish exhaust systems should never be cleaned with abrasives or polishes. 

2.

 

Yoshimura recommends using “Bar Keepers Friend” cleaner to remove minor stains. 

3.

 

Surface reconditioning services are available to remove scratches and undesirable discoloration due to extreme 

heat. Contact Yoshimura Tech Department at (800) 634-9166 / in CA (909) 628-4722 for more information. 

 

 

Summary of Contents for 12270E7220

Page 1: ...roads and can only be used for off highway closed course competition In the state of California it is illegal to modify the emission control system which includes the fuel injection system of any veh...

Page 2: ...st see Fig 6 for bolt locations 7 Remove stock metal tailpipe heatshield by removing the bolt shown in Fig 7 8 Remove stock muffler mounting bolts see Fig 8 and Fig 9 9 Loosen exhaust clamp shown in F...

Page 3: ...t to 2 5 kg m 18 lb ft 23 It is recommended that the muffler and tailpipe be wiped down with rubbing alcohol to remove oil and fingerprints This will help prevent tarnishing of the finish after the ex...

Page 4: ...Installation Procedures Page 4 Fig 3 Fig 4 Fig 5 Fig 6 Fig 7 Fig 8...

Page 5: ...Installation Procedures Page 5 Fig 9 Fig 10 Fig 11 Fig 12 Before After Fig 13 Fig 14...

Page 6: ...um Sleeve use 1227 MPCX Carbon Fiber Sleeve use 1227 MPC 4 2 5 Exhaust Spring 2 RACE SPS 1 5 8mm x 65mm Flanged Hex Bolt Fully Threaded 1 M8X65H F 6 8mm Nut 1 8MMNUT 7 Stainless Steel Exhaust Clamp 1...

Page 7: ...PERING PROHIBITION Federal law prohibits any modification to this exhaust system which causes the motorcycle to exceed the Federal noise standard Use of the motorcycle with such a modified exhaust sys...

Page 8: ...ove adhesive backing from adhesive foil heatshield 5 Carefully install adhesive foil heatshield to the undertail section of the motorcycle Note The template is designed to have overlap Line up circles...

Page 9: ...This page is left blank intentionally...

Page 10: ...his side up 3 Cut along all solid lines 4 Remove adhesive backing from adhesive foil heatshield 5 Carefully install adhesive foil heatshield to the undertail section of the motorcycle 6 Use the remain...

Page 11: ...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 12: ...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 13: ...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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