Size 155 Main Jet For Keihin Round/Slide CV Carburetors - N424-27/155

About This Product

Tuning a motorcycle or ATV with a Keihin carb? This is a size 155 main jet, part number N424-27/155. It's brand new from Niche Cycle Supply. Main jets control the fuel flow at wide-open throttle, so changing the size is how you dial in your air/fuel mixture, especially after installing an aftermarket exhaust or air filter. A #155 is a relatively large jet, often used on bigger-displacement or modified engines. Make sure you know what series Keihin carb you have (round slide, CV, etc.) and that this jet fits. It's a small, inexpensive part that makes a huge difference in how your engine runs. Essential for any DIY mechanic tweaking their carburetor for peak performance or just trying to fix a lean or rich condition. Keep a few sizes on hand for tuning.