Mule 520 Jet Kit Includes Main Jets Drill Bits Idle Mixture Mod Intake Airbox Modification Exhaust Modification Tuning Tech Bike Specs Carb Schematic Carb Synchronizer Tool (how to build for $5) Step by step instructions with photos for ease of installation. Installation Support - If you need assistance we are there for you. MAXIMUM PERFORMANCE LONGER ENGINE LIFE · EXHAUST POPPING? · FEELS SLUGGISH? These are signs of a LEAN ENGINE, a Jet Kit will fix those issues. BENEFITS MORE HORSE POWER Designed to gain a safe 8%-10% in HP with intake/exhaust, 3-4% on bone stock. MORE TORQUE By addressing 1/4 throttle, you will feel more power down low, meaning less shifting to a lower gear, and getting off the line. LONGER ENGINE LIFE 6SIGMA JET KIT is a performance upgrade that not only increases power, but allows the engine to run cooler and at optimum, which increases engine component life. INCREASED PERFORMANCE Designed to improve all RPM ranges of performance and a quicker throttle response, helps remove the bog. HOW IT WORKS The stock carburetor from the factory is designed to meet Import Regulations ... not peak performance. Once you install or modify an exhaust or intake, you have put your bike into a leaner condition that will eventually damage your engine due to additional heat from running lean. If you notice any exhaust popping, pinging, or exhaust pipe discoloration, you are extremely lean. 6Sigma Jet Kits provide the parts and installation instructions to enrich/modify all the circuits in the carb, to fix this problem, and add performance you can actually feel in the seat. This is not just some jets in a box, where you get to guess at what you need, and pull your carburetor 10 times trying to figure it out, it is a comprehensive Custom Engineered 6Sigma Jet Kit, addressing all throttle positions, throttle response. Each kit is Custom Engineered by 6Sigma to your bike and its modifications. Replacing just the jets does not address 1/4-3/4 throttle, or throttle response, only full throttle. This Kit is for all throttle positions, and throttle response. This is a tuner kit, to get everything out of your bike, that it can give. We don't just send it to you and hope for the best, we don't stop until your happy. Feel it still needs more on the top end, low end, mid range after installing? Let us know and we will continue to work with you to make it perfect for how you ride. EVERY Kit Custom Engineered EVERY Time MADE IN USA We NEED the following info to design your Kit Year Exact Model Modifications (engine, exhaust, intake, filter type etc . . .) Riding Elevation (height above sea level, and any extreme conditions) Please provide this information in the: -NOTES TO SELLER section after checkout -or Email Customer Reviews · WOW! What a difference. It feels like a whole new bike. Runs perfect...pulls like hell (for a 450).Thank you very much! -Dave · Hi, just wanted to say thanks. The jet kit worked like a dream and the flat spot that has always been a problem with my Daytona 1200 has gone. Very easy installation, too. -m______6 · · great instructions great kit it runs so good i think its time for a clutch 1999-2000 Yamaha YZF R6 -Mike · 81 and 83 XT250's and another kit for my XT550. I bought one before from you and was so impressed I want a second one for my second XT550. Then 2 for my 2 old XT250's. -Edward · this is an 83 gs750 with pods and an open header at sea level. ive had 3 of your kits for customers and they all work great. -jeff h · · Just wanted to give you some feedback on my jetting kit. It's really helped out with the the entire rev range and idles alot cooler than before. The bike is a full on wheelie machine. - s_______6 Dear 6 Sigma, After installing your jet kit my 2007 yz250f is a different motorcycle. Completely eliminated the bog issue I was having. Excellent instructions and value once again. -Tom B. Shipping Domestic orders will ship in 1-3 days and take about a week to receive from the date payment is made. International orders ship in 1-3 days and take at least 2 weeks to receive from the date payment is made. Installation The kit comes with complete instructions for installation. It is easy, just take it slow and pay attention. It is a straight forward process, and we offer full support, instructions, and a complete carb schematic. Only basic hand tools are required. Fair and Honest Guarantee Our goal is to provide a quality upgrade for your bike at a reasonable cost. If you receive your kit and have questions please contact us and we will do what it takes to ensure your satisfaction. We have worked very hard to keep our overhead low and practice Lean Manufacturing concepts, and are able to pass along those savings to our customers. FAQ'S Q: Is this kit for all (1,2,3,4,6) carbs on my bike? A: Yes, 1 Kit is for all the carbs on the bike. You only need to order 1 Kit for your bike. Q: Do you ship international, and how much? A: Yes, we ship worldwide, for $18.42. Q: What size jets come in this kit? A: Each kit is different, based on the bike, modifications, and operating altitude, so jet sizes vary. Q: What Stage (1-7) is this kit? A: Each kit is different, based on the bike, modifications, and operating altitude, so the Stage varies. Q: Do I need a jet kit? A: If you have made any modifications, or just want a little more performance out of your stock bike, then yes you do need a kit. Q: Can I install this kit? A: Yes, you can install it, don't be intimidated if you've never done this before, only very basic skills are needed, and it has instructions with full support. Q: How long does it take to install? A: Time varies, but it is directly related to the # of carbs on your bike. Allow at least 1/2 hour per carb. Q: Does this kit come with everything I need? A: Yes, it is a comprehensive performance upgrade kit. Not to be confused with a basic rebuild kit. Q: I just bought an intake/exhaust, why do I need this? A:Why spend $300 to $700 for an exhaust and air filter that produce a 10% increase in air flow while ignoring the big loss of horsepower due to not installing a comparatively inexpensive jet kit that increases the fuel flow to match.