@thetwosmoker: This chamber isn't for a yz80... Bray wants a complete FMF system, we found a FMF shorty silencer but couldn't find a FMF chamber in stock. We could remove rust/dents from the old FMF chamber but then we got the opportunity to swap cylinders with a yz85. The yz80 chamber would fit the yz85 cylinder but having a Yz85 chamber will allow proper/better engine performance AND it was in stock! The chamber should clear the frame fine but: 1) Front mounting bracket needs to be moved on the frame or chamber. 2) Silencer may not line up perfectly, a custom bracket may be needed. NEED PARTS FROM MOTOSPORT??? Use this link to help a brother out! 😎🤘 https://rstr.co/motosport/85389 @MotoSport.com #yz85 #2stroke #exhaust #parts #thetwosmoker