text: Dynojet offers a wide range of kits to fit any application. Several types (stages) of kits are available to fit your specific needs. Whether you run a standard motorcycle, or a tuned sport bike, Dynojet Carburetor Jet Kits can provide you with a simple and affordable solution to all your carburetion problems. Dynojet Jet Kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. Each Dynojet Jet Kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time.
  Backfiring, flat spots, poor torque, judder at steady speed, engine overheating - with many motorbikes, the carburettors are set very lean at the factory. When you install an aftermarket exhaust or a different air filter, if not before, the need to tune your carbs will become all too apparent. Fuel consumption rises and power output drops when a carburettor's jets and needles become worn
  In both cases, the carburettors should be overhauled. With a Dynojet Carburettor Kit, your engine will at last get exactly the mixture that it needs for optimal performance. The kits undergo lengthy testing with the vehicle on the test bed. They contain not only new main jets, but usually also specially shaped fuel needles, which deliver the correct quantity of fuel in the middle (part throttle) engine speed range, thus helping to prevent flat spots when accelerating. To ensure optimal throttle response, the kits also include air correction jets (depending on the requirements of the particular engine). (kit contents will vary for different motorcycle models)
  Stage 1 Kits
  Designed for motorcycles with a stock engine using the stock airbox, air filter, and stock or aftermarket pipe. Stage 1 kits are fully adjustable to allow the use of well- designed aftermarket pipes and K&N stock replacement air filters. Stage 1 kits are designed to improve throttle response and driveability – in most cases; power increases of approximately 5% throughout the entire power range can be achieved.
  Stage 2 Kits
  Designed for motorcycles with a stock or mildly modified engine using a well- designed stock or aftermarket pipe with a modified airbox and a stock or K&N replacement air filter. Stage 2 kits are designed for applications where individual air filters cannot be installed and for applications where airbox modifications improve overall engine performance. In most cases power increases of approximately 8% can be achieved.
  Stage 3 Kits
  Designed for motorcycles with stock or mildly modified engines using K&N individual air filters and a stock or aftermarket pipe. In most cases power increases of 10-15% can be achieved. However, driveability may be compromised particularly with short stroke high RPM motors. On some modern engine and airbox designs, individual filters and proper jetting offer no performance improvement, yet compromise driveability. In such cases stage 3 kits are not available.
  Stage 7 Kits
  Designed for race use only or special applications. With the exception of our Harley-Davidson® stage 7 kits, all stage 7 kits are high RPM, racetrack use only and are not suitable for street use.
  Thunderslide for Harley-Davidson® and Buell, is the benchmark in jet kit design. It incorporates the first custom-made slide by an aftermarket manufacturer, something no other competitor can claim. The unique configuration allows precise control over the slide’s range of movement. The slide creates a stronger signal, which improves fuel atomization. This provides more power, increased throttle response and improved fuel economy.