Does your Yamaha YZ450F sputter and hesitate when you need peak performance? A sluggish carburetor can ruin your ride, turning thrilling motocross sessions into frustrating slow-downs. Finding the right rebuild kit to bring that punch back can feel like navigating a maze. You worry about getting the wrong parts, cheap materials that fail quickly, or kits that don’t quite fit your specific model year.
Wasting time and money on the wrong components is a common headache for riders. You deserve a carburetor that breathes fire, not coughs! This guide cuts through the confusion. We will show you exactly what makes a quality rebuild kit for your YZ450F carburetor. You will learn to spot the essential components, understand compatibility, and choose a kit that guarantees smooth, reliable power delivery.
Prepare to unlock your bike’s full potential. Keep reading as we dive deep into the best rebuild kits available, ensuring your YZ450F is ready to dominate the track.
Top Rebuild Kit For Yz450F Carb Recommendations
- Fit for Honda CRF250R 2004-2009 2012-2017, CRF250X 2004-2009 2012-2017V, TRX450R 2006-2009, TRX450ER 2006-2009 2012-2014, CRF450R 2002-2008, CRF450X 2005-2014V
- Fit for Suzuki DRZ400, RMZ250 2004-2009, RMZ450 2005-2007
- Fit for Kawasaki KX250F 2004-2010, KLX 450R 2008-2009, KX450F 2006-2009
- Fit for Yamaha YZ250F 2001-2013, YZ426F 2000-2002, YZ450F 2003-2009, YFZ450 2004-2009, WR400F 2000, WR450F 2003-2011V, WR250F 2001-2009 2011-2013, WR426F 2001-2002
- Package includes: 1x Carburetor Repair Kit
- Compatible: The carburetor repair rebuild kit compatible with Yamaha YZ250F 2001-2013, WR250F 2001-2009 2011-2013, WR426F 2001-2002, YZ426F 2000-2002, WR400F 2000, YFZ450 2004-2009, YZ450F 2003-2009, WR450F 2003-2011V
- Compatible: The carburetor repair rebuild kit compatible with Honda CRF250R 2004-2009, CRF250R 2012-2017, CRF250X 2004-2009, CRF250X 2012-2017, TRX450R 2006-2009, TRX450ER 2006-2009, TRX450ER 2012-2014, CRF450R 2002-2008, CRF450X 2005-2014
- Compatible: The carburetor repair rebuild kit compatible with Kawasaki KX250F 2004-2010, KLX 450R 2008-2009, KX450F 2006-2009
- Compatible: The carburetor repair rebuild kit compatible with Suzuki DRZ400 2004-2009, RMZ250 2004-2009, RMZ450 2005-2007
- Easy to Install: The carburetor repair rebuild kit is convenient to install, you can direct replacement and mounts
- 【Replace Part Numbers】18-5142, 18-7968, 7261512, CRY-42015, 5TG-14101-31-00
- 【Fitment】Fit for Honda CRF250R (2004-2009 2012-2017), CRF250X (2004-2009 2012-2017), TRX450R (2006-2009), TRX450ER (2006-2009 2012-2014), CRF450R (2002-2008), CRF450X (2005-2014)
- 【Compatible】Fit for Yamaha YZ250F (2001-2013), YZ426F (2000-2002), YZ450F (2003-2009), YFZ450 (2004-2009), WR400F (2000), WR450F (2003-2011), WR250F (2001-2009 2011-2013), WR426F (2001-2002)
- 【Note】Please double-check that the part number,photo and size match before purchasing,make sure whether it fit the part you want
- 【Detailed Parameters】If you have any questions about the product size, please do not hesitate to contact us, we will reply immediately after receiving the information!
- Fitment: Carburetor Carb 1 Pc Rebuild Kit Replacement for Yamaha YZ250F 2003-2013, YZ450F 2003-2009, YFZ450 2004-2009, YZ426F 2000-2002. Replacement for Suzuki RMZ250 2004-2009, RMZ450 2005-2007. Replacement for Honda CRF150R 2007-2009, CRF150RB 2007-2009, TRX450ER 2006-2009 2011-2014, TRX450R 2006-2009 2012, CRF250R 2004-2009 2012-2017, CRF250X 2004-2009 2012-2017, CRF450R 2002-2008, CRF450X 2005-2014. Replacement for Kawasaki KX250F 2004-2010, KLX 450R 2008-2009, KX450F 2006-2009
- Part number: 18-5142 7261512 CRY-42015 5TG-14101-31-00 18-7968
- Installation: Turn off the power, clean the dirt, remove the problematic parts, install them separately and pay attention to their position and sealing, start the vehicle and check its operation.
- Package include: 1 Pc Carburetor Rebuild Kit as picture shows
- Feature: This product is easy to install, and can be completed with basic tools such as screwdrivers and tweezers.
- Fit type: Replacement for Yamaha YZ250F 2003-2013 YZ450F 2003-2009 YFZ450 2004-2009 YZ426F 2000-2002. Replacement for KTM 450EXC 2006-2010 450SX/SX-F 2006-2010 450XC/XC-W 2006-2010 525EXC 2006-2007 525XC/XC-W 2006-2008 530EXC 2008-2010. Replacement for Suzuki RMZ250 2004-2009 RMZ450 2005-2007. Replacement for Kawasaki KX250F 2004-2010 KLX 450R 2008-2009 KX450F 2006-2009. Replacement for Honda CRF150R 2007-2009 CRF150RB 2007-2009 TRX450ER 2006-2009 2011-2014 TRX450R 2006-2009 2012
- Package Included: 1 Set Carburetor Rebuild Kit
- High quality material: Rubber has good flexibility and aging resistance. Effectively prevent hardening and cracking.
- Function: The kit provides a wide range of components that are well adapted to the original carburetor for maintenance and adjustment. Installation can be easily completed without complex modifications.
- Note: Please confirm the quantity of products and the compatible models. We will provide you with satisfactory after - sales service. If you have any questions, please contact us and we will reply as soon as possible.
- Fit for Yamaha YZ250F 2001-2013 carburetor rebuild kit.
- Fit for Yamaha YZ400F 1998-1999 carburetor rebuild kit.
- Fit for Yamaha YZ426F 2000-2002 carburetor rebuild kit.
- Fit for Yamaha YZ450F 2003-2009 carburetor rebuild kit.
- Fit for Yamaha YFZ450 2004-2009 carburetor rebuild kit.
- Kits include all of the necessary components to repair a carburetor; Atv models with two carburetors include components to repair two carburetors
- Kit includes all O-rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat; Oem jet sizes are included in the kit
- Nbr rubber material is used on all O-rings and rubber gaskets nbr has excellent resistance to the ethanol used in today's fuels
- Components included in the kits are based off of us models and discretion must be used when attempting to install the kit on a non us model
- Applications that use paper float bowl gaskets are upgraded to high performance interface gasket material; Off road use only
- COMPATIBILITY: Compatible with HONDA [2004-2009, 2012-2017] CRF250R [2004-2009, 2012-2017] CRF250X [2006-2009] TRX450R [2006-2009, 2012-2014] TRX450ER [2003-2006] CRF450R [2005-2007] CRF450X.
- COMPATIBILITY: Compatible with YAMAHA [2001-2013] YZ250F [2000-2002] YZ426F [1998-1999] YZ400F [2003-2009] YZ450F [2004-2009] YFZ450 [2000] WR400F[2003-2011] WR450F [2001-2009, 2011-2013] WR250F [2001-2002] WR426F.
- COMPATIBILITY: Compatible with SUZUKI [2004-2009] RMZ250 [2005-2007] RMZ450; Compatible with Kawasaki [2004-2010] KX250F [2008-2009] KLX 450R [2006-2009] KX450F; Compatible with KTM [2006-2010] 450SX SMF [2002-2007] 400XCW [2007-2009] 505SXF XCF [2003-2011] 530EXC [2004-2005] 450EXC [2006-2009] 450XC-F [2004-2012] 450SXF [2004-400EXC.
- OE NUMBER: Replace 16021-MEB-771.
- SATISFACTION: OXCANO ensures brand new and high-quality Carburetor Rebuild Carb Repair Kit. In terms of any problem with this product, please contact us, our friendly assistants will always be available to help you within 24 hours.
Your Essential Guide to Buying a Rebuild Kit for Your YZ450F Carburetor
Your Yamaha YZ450F is a beast on the track, but even the best machines need maintenance. When your carburetor starts acting up—maybe it sputters, leaks, or just won’t idle right—a full replacement can cost a lot. That’s where a rebuild kit comes in! This guide helps you choose the best kit to bring your carburetor back to life.
Key Features to Look For in a YZ450F Rebuild Kit
A good rebuild kit contains all the small, crucial parts that wear out over time. You need to check for these items before you buy.
Complete Component Checklist
- Gaskets and O-rings: These seal all the different parts of the carb together. Look for kits that include every single gasket. A bad seal means leaks!
- Needle and Seat: This assembly controls how much fuel flows into the float bowl. Worn needles cause flooding or lean running.
- Jets: Main and pilot jets deliver the right amount of fuel for different throttle openings. Ensure the kit includes jets close to your bike’s stock sizes, or perhaps some optional sizes for tuning.
- Float Bowl Gasket: This is a common failure point. A thick, high-quality rubber or Viton gasket is best.
- Drain Screw Washers: These small washers prevent fuel leaks when you drain the bowl.
Understanding Important Materials
The quality of the materials directly affects how long your carburetor runs well. Cheap materials break down fast under heat and fuel exposure.
The Importance of Viton and High-Grade Rubber
Many older kits use standard rubber for O-rings and gaskets. Modern fuels, especially those containing ethanol, eat away at regular rubber quickly. You want kits that use **Viton** (a synthetic rubber) or high-quality nitrile rubber for the critical seals.
- Viton Seals: These resist fuel breakdown and high temperatures much better. They last longer and prevent annoying leaks.
- Brass Jets: Jets should always be made of brass. They wear down slowly and maintain precise fuel flow. Avoid plastic jets—they change size as they wear!
Factors That Improve or Reduce Kit Quality
What makes one kit better than another? Usually, it comes down to precision and material choice.
Quality Indicators
A high-quality kit will offer parts that match the original factory (OEM) specifications perfectly. Poorly made parts won’t fit snugly. This causes air leaks or fuel restrictions.
- OEM Match: Does the seller state the parts meet or exceed OEM standards? This is a good sign.
- Precision Machining: Jets must have exact hole sizes. If the machining is sloppy, your bike will never run right, no matter how much you tune it.
- Brand Reputation: Kits made by well-known aftermarket suppliers often use better quality control than generic, unbranded options.
Conversely, kits that use soft, thin gaskets or include jets that look slightly different from the originals will likely reduce the quality of your repair.
User Experience and Use Cases
Who buys these kits, and what are they trying to achieve?
When to Use a Rebuild Kit
You typically buy a rebuild kit for two main reasons. First, you are performing routine maintenance after many hours of hard riding. Second, you bought a used YZ450F, and you suspect the carburetor has old, gummy fuel deposits inside.
A successful rebuild means your bike starts easily when cold, idles smoothly without stalling, and delivers smooth power through the throttle range. Users report that kits with excellent O-rings significantly reduce the time spent troubleshooting leaks after reassembly. If you are preparing your bike for a race season, a fresh kit ensures reliability when you need it most.
10 Frequently Asked Questions (FAQ) About YZ450F Carb Rebuild Kits
Q: How often should I rebuild my YZ450F carburetor?
A: If you ride often (weekly), plan a full rebuild every two years, or if you notice performance issues like rough idling or fuel leaks.
Q: Will this kit fit my specific YZ450F year?
A: Carburetors change slightly between model years (e.g., 2003 vs. 2017). Always check the kit description carefully to ensure it matches your bike’s exact year and model.
Q: Can I use this kit if I have aftermarket performance parts?
A: Yes, but you might need to swap out the included jets. Performance modifications often require different fuel mixtures than stock settings.
Q: What is the hardest part of installing the kit?
A: Getting the float level set correctly is often the trickiest part. It requires careful measurement, but the new float valve in the kit helps tremendously.
Q: Do I need special tools to install the kit?
A: You need basic metric wrenches and screwdrivers. A specialized tool for measuring float height is highly recommended for the best results.
Q: Why is my carb still leaking after using a new kit?
A: If it still leaks, the carburetor body itself might be warped or cracked. The kit fixed the seals, but the main housing has damage that needs professional repair or replacement.
Q: What is the difference between a stock kit and a race kit?
A: A stock kit uses parts matching factory specs. A race kit often includes optional jets or needle shims to help you tune for high-performance racing conditions.
Q: Should I clean the carburetor body before installing the new parts?
A: Absolutely! Always thoroughly clean all passages and jets with carburetor cleaner before installing any new seals or jets from the kit.
Q: Are these kits hard on the environment?
A: The parts themselves are generally not an environmental issue, but you must dispose of old gasoline and carburetor cleaning chemicals properly according to local rules.
Q: Will a new kit fix poor throttle response?
A: Yes, if the issue is caused by a worn needle or clogged pilot jet. Fresh, precisely sized jets restore crisp throttle response.