Dynojet Stage 1 Jet Kit Honda Crf150R / Expert Stage 1 Dynojet kits were designed to maximize carburetor performance and are intended for unmodified or mildly tuned engines using the stock airbox, air filter and stock pipe or a quality high-flow aftermarket pipe. The main benefits of the Stage 1 Jet Kit are improved throttle response, smooth power transfer and in most cases power increases of approximately 5 throughout the entire power range are achieved. Features: Intended for stock or mildly tuned engines using the stock airbox, air filter and stock or quality high-flow aftermarket exhaust Designed to maximize carburetor performance Improves throttle response and power transfer Power increases of approximately 5 can be achieved Includes detailed installation instructions Note: Images are for reference only, actual kits will vary per make and model.