Yamaha FZ/FZS1/FZ1 | 2006-2015Increased horsepower Increased torque Improved throttle response Improved fuel efficiency Direct OEM replacement Made in USA The FZ1 is the ultimate street brawler for today's rider. Improve your mid range punch by installing Hi Performance Energycoil on your FZ1. With increased spark strength and a longer hotter spark event that provides a more complete combustion burn which equals more torque and power from low rpm all the way to redline. Crisper