all i can say is wow i mean the bike feels better sounds better and u can feel the power increase installed this on my 2012 crf250r and i am just speechless
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The work that went into developing the RS-4 muffler design paid big dividends in 2010 with Ryan Dungey winning the AMA 450 Supercross and Motocross Championship series as a rookie in the same year, and again in 2012 with the Yoshimura-backed GEICO Honda team winning both 250 Supercross Lites titles. That same R&D has been directed to developing the current generation RS-4 - a unique design that provides an unrivaled combination of power and a quiet exhaust note. The RS-4 features a polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap.
- Pentagonal-shaped muffler sleeve and aluminum mount bracket.
- Front muffler cap functions as a polyresonant chamber which helps reduce noise.
- Two-staged stepped baffle.
- Innovative carbon cone end-cap.
- Durable high-grade titanium tapered header and mid-pipe.
- Considerable weight reduction.
- Step-by-step directions and all necessary hardware included for an easy installation.
- Note: Stainless systems come with both a 94db and AMA 2-m Max sound insert. Titanium and Carbon Fiber systems are equipped with a 94dB sound insert installed and the 2-Meter max insert is optional (sold separately).
Yoshimura Exhaust Series Descriptions:
Race Series: If you're looking for that competitive edge, look no further than Yoshimura's Race Series. These exhaust systems are designed with nothing but power in mind. Each Race Series system is developed in accordance with noise compliance regulations imposed by most racing sanctioning bodies worldwide. FOR CLOSED COURSE COMPETITION ONLY; NOT INTENDED FOR STREET USE.
Signature Series: Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. The Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many off-road applications. Everyone of Yoshimura's Championship Winning Motocross exhaust systems and nearly all of the ATV / Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations. (CARB/EPA tail-pipe emissions compliant; all applications are marked with appropriate EPA noise emissions labels and certified by an independent laboratory for EPA noise compliance.)
I put this pipe on my Crf450 and it dramatically improved the throttle response, and totally eliminated flameouts/pop stalls.
Exhaust fits perfectly on the bike, makes coldstart a lot easier, give the power a little more of a "kick" to the bike, and give it a beefier sound.
This pipe adds tons of power! I was really surprised how much i noticed it, it added power everywhere. The low end power is really brought to life on my 2010 crf250r. Install was simple and so far after about 5 months I've had no trouble at all. Durability seems good too.
i put this exhaust on my 2010 honda 250f. the bike was kinda slow stock but ive never noticed such a power gain from just an exhaust as much as i did with this one. it also sounds great. it sounded like the bike had motor work from just the exhaust. i have a full race motor in it now and this is the best exhaust ive ever ran on any of my bikes! GET ONE!!!!!
One of the best products I've purchased and a must have for the '09 CRF450. The '09 CRF450 falls on its face at about 8200RPM, but this pipe adds about 3+hp on the dyno and brings peak power to about 9500RPM which is a massive improvement.
I didn't realize at first, but I thought the included 94db insert was missing when I unpacked everything. Turns out it is pre-installed and you can see it in the product photo. The pics I added are the pipe without the insert (99db)(almost 1hp gain) and the free exhaust plug and spring puller that come with the kit.
Don't bother with the full carbon kit. It only saves 0.2lbs over this full titanium and carbon will breakdown as the packing wears out. This drops over 2.0lbs from the stock unit. Oh and Titanium is the easiest to maintain(clean) material there is. The stainless calls for occassional polish every few hours of use etc..
So far I love this new setup and it looks totally trick!
For the 09-10 CRF450R this exhaust is amazing! Massive power increases throughout the ENTIRE powerband.I actually have a Pro Circuit T-4R on my CRF450R, which takes away a little bottom and adds a ton of top end (which I prefer for my riding style). I had the opportunty to try/test the Yoshimura exhaust and it adds power everywhere! It's also premium quality and style, as is the Pro Circuit.
T: (909) 628-4722 Ext: 410