I installed this carb on my Harley FDX with only minor modifications as expected by reading installation instructions. I have to file a small amount of two of the engine cooling fins which is completely unnoticeable (with or without the carb installed, if you do a good job) and had to cut off one of the tabs on the back of my air filter plate. Bike started right up after installation and with just a few very small adjustments for idle settings is running great. I immediately have noticed less potential for 'pop' in the engine when doing quick bursts of throttle. Think I am going to love this carb. The chromed carb looks nice too but doesn't come in a kit, so you have to buy the mounting ring that holds the front of the carb in place with the air filter plate.