Very good build quality,the sound is excellent without being annoyingly loud, performance is noticeably better compared to the standard. p.s it's also more linear throughout the rev rangeAbout quality and texture :excellentAbout the feeling of use more powerfulProducts to buy together : noneDifficulty of installation super easy following instructionsCost performance and comparison with other products: very good value for money and relative to the old GPR, YOSHIMURA is much betterAbout shipping and packaging :fast and without problems
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- Instock
496.71 USD (73,700 JPY)
Webike Point: +737 pt
(4.96 USD)
Delivery Information
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Please select product form first.
Product detail
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For driving on public roads ◯
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Weight 3.1
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Certification Standards Government Certification
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Race-specific products ×
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Acceleration noise (dB) 80
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Proximity exhaust noise (dB) 91
Oil change: ○
Oil filter change: ○
**Not compatible with European specification bikes with O2 sensor.
*There is a hole on the carbon end of the exhaust to drain water from the exhaust.
*It is difficult to open it neatly because of its structure, so it may look distorted and broken.
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[Recommended parts] ・Exhaust wash plug (to prevent water from entering the exhaust when washing the bike)
[Separately required parts] - Yamaha stock gasket (pipe connection part, Yamaha part number: 5PX-14755-00)
■Conforms to 2006 and 2007 exhaust gas regulations and 2010 noise regulations
| Main Material | Stainless |
| Proximity Exhaust Noise | 91dB / 5000rpm |
| Acceleration Driving Noise | 80dB |
| Model | JBK-DG15J |
| Engine Model | G363E |
| Automotive Emission Test Results Certificate (Gas Repo) | Available
The WR250R / X, which inherits the name and DNA of the competition model "WR", is available with the "Slip-On-RS-4J-cyclone carbon end".
The "RS-4J" is a cyclone that combines Yoshimura Japan's technology with US Yoshimura's motocross "RS-4" silencer design that has been used in AMA Supercross and other events.
The cone end is made of high quality carbon material.The front side of the silencer has been laser marked with "RS-4J" and the back side has been emblazoned with a "double emblem" as standard.
The lineup includes a slip-on version for easy replacement.40% lighter than standard exhaust (Stock: 5.1kg, RS-4J Titanium Cover: 3.1kg).
The performance characteristics of the standard exhaust eliminates the trough that occurs around 5,000 rpm and achieves a smooth blow-off.It produces a lot of torque especially in the mid-range where it is used regularly.There is little drop off after the peak power, and it exceeds the performance of the standard exhaust in the whole range.
[What is EXPORT SPEC]
This EXPORT SPEC is the result of a request from an overseas user who is very particular about the performance of the product, while keeping the original artisanal Tig (weld) burn color and machining marks.By using highly durable stainless steel as the material, YOSHIMURA has achieved a unique design and style with excellent cost performance.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
NEW ARRIVALS IN USED PARTS FOR
NEW ARRIVALS IN USED PARTS FOR
NEW ARRIVALS IN USED PARTS FOR
New arrivals in used
New arrivals in used
Customer Reviews
Reviews with image
Fits:YAMAHA WR250R 07-, YAMAHA WR250X 07-, YAMAHA WR250X 07-, YAMAHA WR250R 07-
Installed on: YAMAHA WR250X
Fits:YAMAHA WR250R 07-, YAMAHA WR250X 07-, YAMAHA WR250X 07-, YAMAHA WR250R 07-
Jan 5, 2021
Better than stock in many ways
I've been looking for the RS-4 US version and stumbled upon this beauty at WeBike. There's a number of difference between this and the US version. This for an instance is a lot quieter but it is missing the heat shield found on the US version. It looks a bit less cuz the US version is just awesome to look at with its side mounted exhaust hole and pre-installed bracket. Still, I like this better as far as sound goes and I don't think I have to repack this. Fits snug with the SP Tadao too!+Good looking exhaust+Pretty light, maybe 2/3 lighter than stock?+Good low-end noise-No heat shield-Requires a header for better low-end torque return
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Fits:YAMAHA WR250R 07-, YAMAHA WR250X 07-, YAMAHA WR250X 07-, YAMAHA WR250R 07-
Aug 11, 2017
The sound is bigger than I thought
Performance, multi data FMF, built YOSHIMURA I got lost but determined by seeing both realities. It was impressive in the photo, but it is quite a good shape to wear (Shape like FMF or Sakura Industry) What is the impression of running in combination with TADAO, PB? Although the sound is said to be quiet, it is quite Large. ? The power of the beginning has obviously disappeared, but the middle-high rotation turns pleasantly. According to the future setting. Hope to Manufacturer Bracket to fix the car body and Silencer (A little bent Bracket) Orientation is obscure in Instruction Manual. This Instruction Manual looks opposite.
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Fits:YAMAHA WR250R 07-, YAMAHA WR250X 07-, YAMAHA WR250X 07-, YAMAHA WR250R 07-
Jun 18, 2016
I made it because I go through JMCA
In fact I was attaching SP Tadayo's Exhaust pipe, so I thought about making it F4 F4 Q4, but I heard the fact that the delivery date has become considerably ahead of me and that I recently regulated the exhaust sound strictly, Then I made it to YOSIMURA RS 4 J that rumored that it is compatible with SP Tadao's Exhaust pipe though it is through JMCA.
At the beginning of the installation, exhaust leakage occurred between SP Tadayo's Exhaust pipe and struggled, but I managed to stop the exhaust leak somehow.
The sound is quiet and pleasant to flowing water.
It looks as if only looking at the Single Item, but it is pretty cool when installed.
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Fits:YAMAHA WR250R 07-, YAMAHA WR250X 07-, YAMAHA WR250X 07-, YAMAHA WR250R 07-
May 3, 2016
I was worried about which to do with FMF, but select YOSHIMURA with a relatively low attachment rate.
The manual was also polite, I did not have to adjust it again and it was easy to install. I use it in conjunction with PowerBox, but I do not need Gasket at the joint with the exhaust manifold ... I was preparing, but the liquid Gasket was enough enough.
Volume is noisier than necessary, I think that it is a range that does not have a problem personally. It feels good Yoshimura feeling at high speed.
Exhaust Spring's Rubber cover also has a stamp of YOSHIMURA because the art is fine (Lol)
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