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Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015
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  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 - Aluminum
  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 - Aluminum
  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 - Aluminum
  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015
  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 - Carbon Fiber
  • Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 - Carbon Fiber

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MSRP
$395.00 - $530.00
Savings (10%):
$39.50
Price
$355.50

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Video Review

Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015 Videos

This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura RS-9 Race Exhaust System Honda Grom MSX125

The same Yoshimura exhaust system deigned for AMA Pro Supercross and Motorcross competition is now available for the Honda Grom. The RS-9's parallelogram-shaped muffler body increases muffler volume over the stock system, resulting in better throttle response and improved noise cancellation. The uniquely sculpted Carbon Fiber end-caps feature a Tunable Insert System, able to fine-tune power delivery and decibel levels to rider specifications.

Features:

  • Polished 304-L Stainless Steel
  • Lightweight laser cut rivet-bands
  • Premium quality closed-end rivets reinforced
  • Made In USA

Resources:

5 / 5
Bang For The Buck
4.9 / 5
Ease Of Install
4.7 / 5
Durability
5 / 5
This Product Fits:
Honda
Grom MSX125 2014, 2015
Product Style RevZilla Item # Manufacturer Product # Availability
Aluminum / Full System 907305 121200H320/ In Stock: Ships within 24 hours
Carbon Fiber / Full System 907302 121200H220/ In Stock: Ships within 24 hours

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Returns

If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

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5.0 / 5.0
7 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
7
0
0
0
0
Bang For The Buck
4.9 / 5
Ease Of Install
4.7 / 5
Durability
5.0 / 5
Bang For The Buck
4 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Easy Install, looks and sounds great!
This was a great overalll purchase process! The product came extremely fast, the installation was a breeze, and it sounds great on the bike! A drastic difference from the stock exhaust. In the higher revs, there's a big difference. But idling it'seems surprisingly quite. In the end, a great product ordered through a great company. Couldn't be happier!
January 29, 2016
Ride:
2015 Honda Grom MSX125
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Great Exhaust
This exhaust is perfect for every one including my self need, I can feel the power up and the sound is amazing, loud but not too loud.
May 17, 2016
Ride:
2015 Honda Grom MSX125
Bang For The Buck
5 / 5
Ease Of Install
3 / 5
Durability
5 / 5
quality pipe, great performance
I got this pipe for my mini racer that is Honda based like the Grom. I had to modify it a bit for the frame but it came out excellent, and flows the 184cc motor like a champion. The sound is nice and I would recommend for any Honda based project
June 21, 2016
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Worth the weight alone
Looks trick, sounds great, and super light, especially compared to the stock grom pipe!
January 31, 2015
Ride:
2014 Honda Grom MSX125
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Most refined sound from a Grom
Couldn't be easier it install! Did it in the entrance way of my 600sq.ft apartment. There are cheaper systems out there but this one looks like a million bucks. And the sound is super refined; not ridiculous. Serious performance gains particularly when you do a ram air intake as well.
July 7, 2014
Ride:
2014 Honda Grom MSX125
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
Great look, great sound
I bought the carbon fiber Yoshimura Full Exhaust and couldn't be happier. It looks great, sounds awesome, and gives me a little extra performance to play with. All in all, it was a great purchase and one that I would make again if I had to.
July 28, 2014
Bang For The Buck
5 / 5
Ease Of Install
5 / 5
Durability
5 / 5
awesome looks fantastic and sounds mean, its not overly loud either
Sounds great and is not too loud. The carbon fiber looks fantastic. Delivery was fantastic and fast.
June 12, 2014
Ride:
2014 Honda Grom MSX125
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Have a functionality, fit, or otherwise product-specific question about the Yoshimura RS-9 Race Exhaust System Honda Grom 2014-2015? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

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Browse 9 questions Browse 9 questions and 20 answers
Why did you choose this?
RevZilla Store
Its was so hard to pick with all the choices Revzilla has, but after all my research i decided to go with the Yoshimura RS-9,seem's to suit my needs and watched a whole lot of videos on sound comparison's on almost every exhaust and I think this one sounded the best! Cant wait for it to get here to put it on!
Edward O on Jul 15, 2016
Sounds awesome and looks great.
simas on Dec 16, 2013
Its was so hard to pick with all the choices Revzilla has, but after all my research i decided to go with the Yoshimura RS-9,seem's to suit my needs and watched a whole lot of videos on sound comparison's on almost every exhaust and I think this one sounded the best! Cant wait for it to get here to put it on!
Edward O on Jul 15, 2016
Reputation and quality. Looks good and nice sound.
Ray S on Feb 27, 2016
Sounds awesome and looks great.
simas on Dec 16, 2013
Reputation and quality. Looks good and nice sound.
Ray S on Feb 27, 2016
Does this include the header pipe?
dopperpod on May 25, 2014
BEST ANSWER: If your looking at the full system, it does come with the header pipe.
What is the difference between this and the street and signature versions? Thanks.
A shopper on Aug 30, 2015
Is it street legal?
A C on Feb 9, 2016
BEST ANSWER: Would advise you to check with your local rules and regulations regarding whether or not it can be installed. I personally have mine installed and haven't had any issues with it. So as far as I know, you should be just fine.
Do I need to purchase a fuel injection controller with the full system on a 2014 grom?
A shopper on Mar 10, 2014
BEST ANSWER: I never used a fuel injection controller and my bike runs great. I have the carbon full system. I noticed a fair amount of power gain at low rpms. When I first installed my exhaust I lost a couple mph top end ( literally 2mph) but the bottom end gain was a fair trade. Over time though, the top end came back. The sound is great!
This is full exhaust?
A shopper on Mar 14, 2016
BEST ANSWER: Yes. And this system doesn't come with a new gasket so be sure to order a new gasket too. I thought I could reuse the existing one, but turns out it leaked.
Does this require a rear fender eliminator?
A shopper on May 19, 2016
BEST ANSWER: No
is it street legal?
A C on Feb 9, 2016
BEST ANSWER: Technically no it is not street legal. Depending on the state you live in you will probably not be hassled about it. It is kind of loud but not Harley loud.Enter an answer to this question.
What is the recommended torque to tighten the pipe?
A shopper on Aug 31, 2013
BEST ANSWER: I've personally heard a few different answers, but I believe if your in the range of 15lbs-20lbs it should be just fine.