Dynojet jet kits increase horsepower, improve throttle response, smooths out powerbands and in many cases improve gas mileage as well. Since most carbureted motorcycles, dirt bikes and even ATVs have to pass some type of smog test by the manufacturer, they can be 'choked up' stock and a jet kit is just the answer to breathe more life into your ride.

These are guaranteed authentic Dynojet jet kits designed for U.S. spec bikes and may not work properly on machines sold elsewhere in the world. If you are an international customer, it may be a good idea to check with a local mechanic to see if this kit would work on your motorcycle. Euro spec jet kits are available for most bikes, but we are not allowed to ship kits into Dynojet UK's distribution area. Other countries, such as Asia, Australia and others are fine. Also, there are some CALIF kits for California jetted bikes, and HI ALT (high altitude) for bikes that live above 4,000 feet.

Jet kits are available in several 'stages.' Stage one kits are for stock or mildly tuned (exhaust and/or a high-flow air filter) machine. Stage 2 and 3 are for stock to moderately tuned bikes and offer an increase in top-end power gain and may compromise the 'friendly' day-to-day powerband. The stage 7 kits are for radically modified bikes where the utmost in performance is desired. Some kits come with enough of a selection of jets that they are combined kits, such as 'stage 1&3' is both a stage 1 and 3 jet kit.

The jets included vary by bike and the stage of the jet kit. Most kits consist of a range of main jets, needle jet(s), slider spring(s) and other parts required for installation. Please visit dynojet.com to see exactly what jets are included with any specific kit. Simply choose your machine and click on the part number of the kit for a list of jets, other parts and installation instructions. Dyno readouts are also available for many models. These are not carburetor rebuild kits, and float bowl gaskets are not included.