Jet Kit Yamaha WR250FCaracteristicas: Designed for machines with stock or mildly modified engines using well designed stock or aftermarket exhausts with a modified airbox and a stock or replacement air filter For applications where airbox modifications improve overall engine performance. A power increase of 8% can be achieved in most cases Designed for machines with stock engines using the stock airbox, air filter and stock or aftermarket exhaust Fully adjustable to allow