Venom x21RS 125 Jet Kit Includes Venom x21 RS 125 Main Jets Venom x21 RS 125 Pilot Jet Venom x21 RS 125 Needle Adjusters Venom x21 RS 125 Nylon Needle Spacers Slide Spring Modification Drill Bits for Slide Hole Modification (optional) Idle Mixture 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 FEELS SLUGGISH? EXHAUST POPPING? MADE IN USA 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 Jet Kit Custom Engineered EVERY Time