Wr250r exhaust fmf I had already installed an FMF EFI Programmer for the fuel injection system, as well Apr 12, 2008 · WR250R - FMF exhaust Discussion in ' Thumpers ' started by Gargoyle, Apr 23, 2008. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Before re-assembly, I measured both pi Aug 17, 2015 · I picked up my WR250R just a week ago. Jan 23, 2021 · What are all and the best performance mods for the wr250r exhaust, air filter, big bore, fuel tuner, weight shedding mods, etc!!!!!!!???? Apr 8, 2018 · This video shows a step by step install of the FMF Mega Bomb header, the FMF Powercore 4, and the 12 Oclock labs EXUP emulator on a 2016 WR250R. Combining the EFI controller with a quality aftermarket muffler, mid-pipe, and header will really wake these bikes up, making them much more fun to ride (and they’ll sound better too!). I think I woul FMF Powercore 4 HEX Slip-On Exhaust Yamaha WR250R / WR250X When designing the PowerCore 4, FMF looked at their top of the line products to deliver race-inspired performance at an economical price. This chamber allows exhaust gases to expand and then contract, When designing the PowerCore 4 HEX, we looked at our top of the line products to deliver race-inspired performance at an economical price. As of spring 2024, FMF has discontinued their mufflers and header pipes for the 2008-2020 Yamaha WR250R/X. Get the best deals for Wr250r Exhaust at eBay. TikTok video from Rusiru (@rusirumalinga421): “Explore the benefits of the FMF exhaust on the Yamaha WR250R. Sep 18, 2017 · I'm looking into my options for adding a little power and was wondering if any of the aftermarket exhaust options come close to how quiet the stock exhaust is. 1 RCT SL EXHAUST(blue) w/ TITANIUM MEGABOMB HEADER. Shop Exhaust Systems for Yamaha WR250 with eBay Guaranteed Fit. What, the WR or the FMF? Again, WTF? Our conversation continues toward me eventually installing a Thumper Racing 280 big bore kit. Type: Header. 99 or shop our massive selection of Slip Ons. FMF Racing® Q4 Hex Slip-On Muffler 044437 Fits 08-20 Yamaha WR250R and 08-11 WR250X FMF is the leader in high performance quiet technology and their Q4 is the next evolution in off road exhaust. We have a great online selection at the lowest prices with Fast & Free shipping on many items! This FMF Q4 Performance Package allows you to choose your own performance exhaust components based on your needs. The Megabomb technology is revolved to produce more low end to mid range gains as well as broadening out the mid to top end power gains over Shop FMF Motorcycle Exhausts & Exhaust System Parts for Yamaha WR250 with eBay Guaranteed Fit. I generally prefer to keep my bikes stock, and thankfully the previous owner kept the original parts. I’m just looking for a smoother throttle. html The Electronic Jet Kit or EJK for short is an EFI controller to adjust fuel for a number of power sport vehicles. 5-3. The EXUP emulator you need to get otherwise you Sep 23, 2025 · People who viewed this item also viewed Wr250R/X Fmf Power Core Exhaust muffler Bomb Set Silencer Exhaust Slip-On $886. We recommend Anti-Seize on all exhaust fasteners. The RS-4 features a Polyresonant duplex chamber, a two-staged stepped baffle and an innovative carbon cone end cap. The Power Core 4 Hex does this using the Hi-flo technology in both the modular end cap and internal core to enhance exhaust gas flow, letting your engine run more efficiently. I don't know which muffler it is, Q4 or Powercore 4. Apr 14, 2009 · Boy I hope I can prove myself wrong, but I have done back to back runs with my Q4/powerbomb combo and my stock exhaust (with exup locked open), and they seem the same. I’ve had a power commander The Two Brothers Racing V. We have a great online selection at the lowest prices with Fast & Free shipping on many items! May 20, 2009 · Anyone running this exhaust? How loud is it? Looking for a little more power, but I need to keep the stock heat shields, etc. ca. 17 $1,107. See below The redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. in place. . YAMAHA WR250R 08-20. The FMF EFI Programmer for the Yamaha WR250R and WR250X is a must anytime you install an aftermarket exhaust system. it looks F'n sexy for Apr 2, 2013 · The FMF Q4 is probably the most popular exhaust system for the 2008+ Yamaha WR250R / WR250X and for good reason… not only does it make the bike sound much better, but it’s not overly loud like some exhausts. Startup sounds and drive bys. Header Const: Stainless Steel. Yamaha WR250R / WR250X: • Yamaha WR250R/X FMF Q4 Performance Package at SRmoto… Jan 20, 2012 · New to the site, I'm looking at FMF exhaust and Leo Vince full exhausts. OK thanks for that. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jun 4, 2025 · This is a used FMF Q4 slip-on exhaust and OEM header pipe set for Yamaha WR250R/X (2007). Shop for Exhaust, like FMF Titanium Megabomb Header Pipe at Rocky Mountain ATV/MC. Produce the low end of a longer header and the top end of a short header. Find top brands, exclusive offers, and unbeatable prices on eBay. I have the EJK Fuel Controller installed on the bike as well. Which is the best one to buy and why? Thanks in advance for your help1 This is my cousin kieths brand new Yamaha wr 250 And a brand new fmf mega bomb exhaust with power core 4 muffler. 40+ Years in Business. NOTE: EJK designs and manufactures Apr 12, 2009 · The FMF power bomb has a bigger OD than the ID of the GYTR, you would have to flare out the GYTR to make it fitand I do not think you would have as nice a exhaust gasket as the Yamaha/GYTR part. com has the FMF Q4 In-Stock. The science behind the Megabomb header may be our greatest engineering accomplishment to date. Get yours now before they’re out of stock again! Yamaha WR250R / WR250X: • Yamaha WR250R/X FMF Q4 Performance Package at SRmoto • Yamaha WR250R/X FMF PC4 Performance Package at SRmoto Honda CRF250L Buy the FMF Racing Q4 Hex Slip-On Exhaust for only $341. ™ M-7 Slip-on is one of our favorite exhaust systems for the Yamaha WR250X Supermoto and WR250R Dual Sport. com Over the decades, we've seen an amazing transformation in the world of motorcycles and ATVs. I’ve ordered a fmf q4 hex for my wr250x and I don’t want to wait a excessive amount time for it to come. I am Forest Service legal now! Mar 17, 2008 · fmf q4 or powercore4 for the wr250r Discussion in ' Thumpers ' started by stormsearcher, Jul 28, 2008. 5k rpms then eventually falling off to idle. Mar 17, 2008 · fmf q4 or powercore4 for the wr250r Discussion in ' Thumpers ' started by stormsearcher, Jul 28, 2008. L. FMF Q4 muffler. Yoshimura is about the last company making an exhaust system for the Yamaha WR250R. With the Q4 you don’t need to hear the power, just feel the power! EXHAUST SYSTEMS: As of spring 2024, there are not many exhaust systems left in production for these bikes. Flapper and Exup removed, of course. I found a site with the FACTORY 4. Oct 29, 2025 · YAMAHA WR250X 08-11. We have the best prices on dirt bike, atv and motorcycle parts, apparel and accessories and offer excellent customer service. Thanks for the help! Get the best deals for Yamaha Wr250r Exhaust at eBay. Discover fitment, performance enhancements, and more! #yamaha #wr250r #fmf”. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. E. The end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that won't break the bank. Shop for FMF Exhaust for your 2016 Yamaha WR250R at Dennis Kirk. Both items have arrived BUT the Exup Exhaust Servo has not. Not finding what you're looking for?Save wr250r fmf exhaust to get e-mail alerts and updates on your eBay Feed. You can bolt on a Megabomb with an existing FMF Racing slip on for as much as a 3hp boost, plus the Megabomb actually reduces noises levels by as much as 1. Run the Q4 Slip-On muffler with your stock header, or pair it with the FMF Powerbomb or MegaBomb header, to really wake up the engine on your bike, as well as give it a much better sound. The guy had the original exhaust as well. FMF is the leader in high performance quiet technology and our Q4 HEX is the next evolution in off road exhaust. We were just notified that FMF has discontinued their entire line of exhausts for the WR250R and will not be making more. In addition to Exhaust, browse our full selection of Parts & Accessories. Put a FMF Spark Arrestor on my GSXR WR250R exhaust. Find many great new & used options and get the best deals for PowerCore 4 Hex Slip on Exhaust FMF 044436 Yamaha Wr250r & X at the best online prices at eBay! Free shipping for many products! Jul 4, 2013 · As part of our FMF Performance Exhaust Packages for the Honda CRF250L and Yamaha WR250R, we are now offering an optional FMF Heat Shield that will fit the FMF PowerBomb headers. Not a rev test video. I happened to stumble onto Motosport. Jul 4, 2013 · As part of our FMF Performance Exhaust Packages for the Honda CRF250L and Yamaha WR250R, we are now offering an optional FMF Heat Shield that will fit the FMF PowerBomb headers. PACKAGE INCLUDES THE FOLLOWING One (1) WR250R WR250X FMF Q4 Slip-On Muffler: FMF Q4 Hex Slip-On Muffler: Constructed from aircraft grade aluminum and high strength stainless steel Removable USFS spark arrestor included Pounds lighter than stock Twin stage core design for lower sound output and extended life of packing material Includes mid pipe insert if you want to use with the smaller Mar 25, 2013 · I had been running a Delta Barrel 4 exhaust on the WR250X project bike, and it was time to re-pack it so I thought what better time to try out a FMF Q4 exhaust system. 00 shipping Jan 21, 2017 · I mentioned my desire to compare my bike (exhaust system) against other aftermarket systems, to which he explains that “We really like the FMF system on the WR, but they’re no longer available”. The Megabomb technology is revolved to produce more low end to mid range gains as well as broadening out the mid to top end power gains over Get the best deal for Motorcycle Exhausts & Exhaust System Parts for Yamaha WR250 from the largest online selection at eBay. Sep 16, 2017 · I have a 2017 WR250R, just purchased the FMF Q4, and the AIS block off. If you're looking for serious performance, you came to the right place. In this step by step tutorial we are going to show you how to install the FMF Q4 exhaust with the Electronic Jetting kit and AI Write in the comment section below!👇👇👇 yamaha wr250r exhaust,yamaha wr250r exhaust systems,yamaha wr250r fmf exhaust,yamaha wr250r gytr exhaust,2008 yamaha wr250r yoshimura exhaust,2012 Jun 8, 2023 · Not sure if this has been covered but Motosport. No way I'd put anything louder on there. As an increased quantity of fuel/air mixture is flowing through the engine, combustion can occur at a faster rate. Unbelievable noise reduction in high-performance package Approved by the Blue Ribbon Coalition and ORBA Compatible with FMF or stock header Advanced design for painless repacking Sound output as low as 92 dB Spark arrestor included FMF is the leader in high performance quiet technology and our Q4 HEX is the next evolution in off road exhaust. Fmf Exhaust Shop for Exhaust at Rocky Mountain ATV/MC. It's a low-mile bike with two previous owners. The FMF Q4 exhaust is the most popular exhaust system for the Yamaha WR250R and WR250X. Jul 11, 2013 · After about 300 miles of riding, I think the FMF Q4 with MegaBomb header might just be the best available exhaust system for the 2008+ Yamaha WR250R and WR250X. If anyone has a general time frame or any knowledge on what’s going on feel free to share. The FMF Powercore Slip-On Exhaust Muffler for Yamaha WR250R models from 2008 to 2017 (part number 044436) is a high-performance aftermarket exhaust system designed to enhance the power and sound of your WR250R. Any advantages to Yoshi pipes vs. Jun 26, 2014 · A blog about motorcycles like the Honda CRF450RL, Honda CRF450L, Honda CRF300L, Suzuki DRZ400S / DRZ400SM, Yamaha Tenere 700, Yamaha WR250R, KTM 690 and other dual sport, supermoto and ADV bikes. But a good idea of wh Feb 10, 2025 · Find many great new & used options and get the best deals for Wr250R/Wr250X Dg15J Fmf Q4 Slip-On Muffler Genuine Exhaust Pie Set at the best online prices at eBay! Free shipping for many products! 2020 Yamaha WR250R with full FMF exhaust. After countless hours of testing, FMF proved you don't have to settle for a plugged up, horsepower-robbing moto muffler to remain sound compliant. FMF? Also what is the the best fuel progammer to be using? I don't want to have to dyno the bike. com the other day and they were In-Stock. Free Shipping on orders over $50. Jun 29, 2020 · Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. With the Q4 you don’t need to hear the power, just feel the power! Quick WR250R exhaust sound demo. Several pounds lighter that stock, with incredible performance at a great price. The last owner fitted (1) Powercore pipe, (2) Power Bomb header, (3) FMF programmer, and (4) EXUP emulator. com ( Brand: Fmf Racing ), ( Manufacturer Part Number: 044437 ), ( Part Type: Slip Exhaust Muffler ) Review FMF RACING Slip Exhaust Muffler Yamaha fits Q4 WR250R WR250X The 044437 FMF Q4 Slip Exhaust Muffler is a high-performance exhaust system designed specifically for Yamaha WR250R and WR250X models. Championship winning RS-4 Slip-On exhaust. This leaves Yoshimura as about the last company to be making an exhaust, their RS-4 Slip On muffler. The FMF Q4 is probably the most popular exhaust for the 2008+ Yamaha WR250R / WR250X and for good reason not only does it make the bike sound much better, but it's not overly loud like some exhausts. Shop now for fast shipping and easy returns! Jul 2, 2025 · Find many great new & used options and get the best deals for Wr250X Fmf Powerbomb Titanium Wr250R Exhaust Pipe at the best online prices at eBay! Free shipping for many products! Apr 9, 2010 · FMF offers both a Q4 and a Power Core 4 exhaust for a WR250R. Or, I had been thinking about buying a used FMF Q4 for some other application and weld the factory pipe to it to allow installation on my WR250R. The package is based around the FMF Q4 Hex Slip-On muffler. FMF MegaBomb Header The FMF MegaBomb header is the top choice for many Factory Teams and is best suited for Motocross, Supercross and GNCC style riding where more bottom to low end response is desired. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Oct 6, 2013 · Combining EFI Controllers With Exhaust Systems: All of the FMF Performance packages we sell for the WR250R/X and CRF250L include an EFI Controller. A unique design that provides an unrivaled combination of power and a quiet exhaust note. Since money is an object, I'll do Nov 16, 2019 · I’m thinking about a power commander, fmf, ejk, etc. Get the best deals for Yamaha Wr250r Exhaust Fmf at eBay. 514 Likes, 47 Comments. Hi-Flo stainless steel core and formed end caps with aircraft grade aluminum FMF is the leader in high performance quiet technology and our Q4 HEX is the next evolution in off road exhaust. Massive selection from top brands on eBay. FMF MegaBomb Header FMF PowerBomb Header FMF PowerCore 4 Slip-On FMF Q4 Slip-On Graves WORKS Full System Two Brothers M7 Aluminum Slip-On Two Brothers M7 Carbon Slip-On The science behind the Megabomb header may be our greatest engineering accomplishment to date. Shop all the best FMF Racing dirt bike 2-stroke and 4-stroke exhausts, headers, and slip-ons here. Get the best deals for Wr250r Exhaust Fmf at eBay. HF ultimate airbox mod. The progression of the technology is one of the challenges that keeps us going. But a good idea of wh Feb 10, 2025 · Find many great new & used options and get the best deals for Wr250R/Wr250X Dg15J Fmf Q4 Slip-On Muffler Genuine Exhaust Pie Set at the best online prices at eBay! Free shipping for many products! Jul 2, 2015 · I just bought a used 2010 WR250R. Includes the header, mid-pipe, and silencer muffler. I'll get a few rides in & post results. We offer the best customer service in the industry! Jan 1, 2009 · 2008 YAMAHA WR250R (also known as WR250X or WR25RX (C)) - First posted 1/1/2009 This page is for my 2008 Yamaha WR250R dual sport 250 cc on / off road motorcycle page specifically for outlining modifications ( mods ) that have been done to enhance performance and usability using aftermarket third party add ons such as upgrade the exhaust pipe header , upgrade the WR250R exhaust silencer , plus More info at: https://soloracer. The Flying Maching Factory, otherwise known as FMF Racing, has put in countless hours developing the FMF Power Programmer. Feb 28, 2023 · I bought a used factory exhaust on eBay, $146 with shipping. Air box flapper removal, AIS removal, FMF Q4 muffler, powerbomb exhaust pipe, and Attitude Gen 3. Parts and Tools list below👇. YAMAHA WR250R FMF Q4 ExhaustSkip the cable setup & start watching YouTube TV today for free. This system increases horsepower, torque and throttle response. Is it safe to install the Q4 on the bike without a fuel controller or… Shop FMF Racing Motorcycle Exhausts & Exhaust System Parts for Yamaha WR250R with eBay Guaranteed Fit. I am rolling up to intersections with the clutch in and the motor at around 2. Upgrades & Features: FMF exhaust with Megabomb header New chain & sprockets ASV FMF PowerBomb Header Yamaha WR250R / WR250X If you spend most of your time riding in the mid to upper RPM range the FMF PowerBomb is the header for you. Just riding around, the FMF sounds better, and I'd say it seems more responsive, but I think it's all in my head. Explore a wide range of our Wr250r Exhaust selection. Nov 22, 2005 · FMF megabomb head pipe instead of the power bomb. This Yamaha WR250R Exhaust Pipe Full System is a complete factory take-off exhaust pipe for your ride, or you can upgrade to the best available (optional). com. FMF Q4 exhaust vs the WR stock exhaust. I’ve adjusted the clutch and cable and it just seems like the throttle response isn’t as smooth as it could be. 5dB. Or an ecu tune (not sure if that’s even possible on this bike). com FMF makes this nice unit that includes clamps, heat shield with the FMF logo and button head screws to hold it on. 71 + $149. 00) today when you shop RevZilla for your FMF PowerCore 4 HEX Slip-On Exhaust Yamaha WR250R / WR250X 2008-2020! Free Shipping, Lowest Price Guaranteed & Top of the Line Expert Service. Jun 5, 2010 · I decided to switch back to the stock header for a seat of the pants comparison. Is it necessary to remove the AIS and the EXUP motor and the flapper valve? I plan May 29, 2008 · Im getting the fmf efi power programmer (ordered 5-1-08), and the P-Core 4 fmf pipe (due in tomorrow), the powerbomb headder will have to wait, or I might just make my own, by adding an expansion like they did. Feb 26, 2016 · I've been running a FMF silencer on my 2010 WR-R for about 5 years and 20k+ miles. I am wondering, with the flapper box mod, Q4, AIS block off and the fuel controller, will the bike ru FMF Power Bomb Header Pipe Exhaust Fits YAMAHA WR250R WR250X 2008-2020 044269 Huge selection of parts and accessories at low prices!! May 7, 2020 · #GSXR1000 #WR250R #FMFSUZUKI GSX-R1000 Racefit Growler / Arrow Works Exhaust | WR250R FMF I’ve got an FMF Q4 that a friend gave me, but no fuel controller to go with it. Works great for me even at 7150 feet elevation. The filter and exhaust are supposed to reduce the restriction on the air flow into and out of the engine respectively. FMF was there in the days when the singleshock and watercooled engines were huge innovations and we're glad to be here now for the aluminum chassis and electronic fuel injection. 2 fuel programmer. com Jul 15, 2016 · I plan on adding a fuel programmer and to do the full air box modification. A. | Browse our daily deals for even more savings! | Free shipping on many items! Unbelievable noise reduction in high-performance package Approved by the Blue Ribbon Coalition and ORBA Compatible with FMF or stock header Advanced des Graves Motorsports Yamaha WR250R / WR250X WORKS Exhaust System features Graves proprietary ADSD exhaust technology. No Hassle Returns. FMF approached the design process of the Q4 HEX with the goal of achieving more power while keeping noise levels to a minimum. The guy had put an FMF Muffler on it. Then save $23/month for 2 mos. Header and mid pipe are constructed from Stainless Steel,and the muffler is Titanium Silencer with a carbon fiber end cap. The PowerBomb incorporates a patented chamber at a precise location in the initial stage of the header. NOTE - works with FMF Exhaust Silencer ONLY. 5-star rated FMF Powercore 4 slip-on exhaust for 4-stroke dirt bikes or ATVs delivers an immediate increase in power and torque. We recommend this product any time you are installing an aftermarket exhaust, intake, or when you just want to make your stock bike run better. The patented header design allows exhaust gasses to expand, cool and ramp back up at a higher velocity. Yamaha WR250R / WR250X: • Yamaha WR250R/X FMF Q4 Performance Package at SRmoto… Shop Motorcycle Exhausts & Exhaust System Parts for 2008 Yamaha WR250R with eBay Guaranteed Fit. FMF programmer set to HF's settings. WR250R WR250X FMF Q4 Exhaust vs Stock Exhaust Sound Can I Fix This Unfixable Iconic Ninja Super Sport Bike? The Yamaha WR250R is Back on the Streets Again! - Morning Commute Onboard POV May 15, 2015 · So I'm Looking at upgrading the exhaust of course. I was wondering if anyone has used the Leo Vince X3 full race Ti exhaust with removing the EXUP valve and installing the eliminator. Click links below for more details on these FMF Performance Packages. Megabomb header and Q4 Muffler. May 7, 2017 · Yamaha WR250R 2014 First start with a FMF Powerbomb header and Powercore4 muffler Explore a wide range of our Wr250r Exhaust selection. com/wr250rfmf2. I'm not sure how to identify the muffler so if anyone has some tips on identifying the muffler that would be great. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Aug 27, 2013 · Weekend sale extended! We’ve marked down our FMF Performance Exhaust Packages for the Yamaha WR250R, Yamaha WR250X and Honda CRF250L. What a difference! SUBSCRIBE and CLICK that BELL to make it RING for the LATEST EPIS I bought a 2016 WR250R last September with what I take it are some standard mods to the bike. Shop official FMF Racing dirt bike & ATV mufflers and exhaust parts, exclusive apparel, t-shirts, hats, goggles, and sunglasses here. -Overall increase in power and torque. If you want looks too, all this performance is housed in a premium grade aluminum canister, stainless mid pipe, and stainless end cap for that signature, clean FMF look. The fuel programmer allows more fuel to be injected to compensate for the increased amount of air. (sounds better When designing the PowerCore 4 HEX, we looked at our top of the line products to deliver race-inspired performance at an economical price. May 16, 2015 · When I wrote the review for my 2012 Yamaha WR250R my final comment was, “Next stop on the WR250R upgrade train is FMF Q4 pipe with a mega-bomb header, then Thumper Racing’s 285 big bore kit. FMF Q4 slip-on silencer. I tired of chasing the FMF emails stating they had some available directly only to find them “sold out” within an hour. Our goal will never change - take the most Graves Exhaust Full System Works For Wr250r + Wr250x 2008 and up Exy-08wr2-Fstw ★★★★★ (2) $1,079 00 USD $1,199 00 Jan 5, 2020 · Sound check of my FMF Power Core 4 exhaust on my WR250R. Adapter at the header pipe connection is stuck and cannot be removed but works seamlessly with the included OEM header pipe. i didn’t want to post 1-48 of 159 results for "wr250r exhaust" Results Check each product page for other buying options. This muffler is a must-have upgrade for any serious off-road enthusiast looking to enhance their FMF Q4 HEX S/A Slip-On Exhaust Yamaha WR250R / WR250X The FMF Q4 HEX has always been in a league of its own and proves you don’t need to settle for a plugged up moto muffler hampered by an insert when you can have a compliant muffler engineered for power and performance. Shop now for fast shipping and easy returns! Apr 9, 2010 · FMF offers both a Q4 and a Power Core 4 exhaust for a WR250R. 2008 Yamaha WR250R — $2,700 FIRM Street-Legal & CA Plated — Senior Owned Located in ukiah CA listed for my father. Great deals. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Apr 2, 2013 · The FMF Q4 is probably the most popular exhaust system for the 2008+ Yamaha WR250R / WR250X and for good reason… not only does it make the bike sound much better, but it’s not overly loud like some exhausts. Save 5% ($20. This results in torque gains typically associated with longer headers, and the healthy Get the best deals for Yamaha Wr250r Fmf at eBay. I rode for a week with the FMF parts but decided to return to stock, mostly because I get self Feb 4, 2009 · Exhaust Mods Here YamWOW! I'm thinking mine, like others, will end up with a FMF Q4. We are running the Carbon version of the Slip-On, along with a Delta header and FMF EFI Programmer, on our WR250X project bike. The FMF Megabomb Steel Exhaust Header for Yamaha WR250R/WR250X, model number 044356/44356, is a high-performance exhaust system designed specifically for racing enthusiasts. FMF makes this nice unit that includes clamps, heat shield with the FMF logo and button head screws to hold it on. MotoSport ships free. Probably little to no difference there. Find many great new & used options and get the best deals for PowerCore 4 Slip on Exhaust Muffler FMF 044270 Yamaha Wr250r & Wr250x at the best online prices at eBay! Find many great new & used options and get the best deals for Q4 Hex Slip on Exhaust FMF 044437 Yamaha Wr250r & X at the best online prices at eBay! Free shipping for many products! Jun 4, 2025 · This is a used FMF Q4 slip-on exhaust and OEM header pipe set for Yamaha WR250R/X (2007). Mar 26, 2015 · However, I do need some proper settings for the fmf efi programmer with stock exhaust and air box mod if anyone has one right off hand, as my bike is getting way too much fuel on deceleration. Home > Dual Sport > Yamaha WR250X/R Parts > EJK Fuel Injection Controller EJK, short for Electronic Jet Kit, provides the best available EFI (Electronic Fuel Injection) controller for the Yamaha WR250R and WR250X. Proudly made in USA. When I added the pipe I did not install a SS header (Megabomb/Powerbomb) beca Mar 17, 2011 · I've put about 1,000 miles on my WR250x and have started to look at exhaust systems.