Graves Motorsports Smog Block Off Plates for the Yamaha FZ-09 / XSR900 / MT09 / YXZ1000r. Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS). Sold in pairs as a set (to complete 1 bike or side x side install). This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.
Fitment: Yamaha FZ-09 2014-2017 / Yamaha XSR900 2016-2017 / Yamaha FJ-09 15-117 / Yamaha YXZ1000r 2016-2017 / MT-09 2018
The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons.
Once these are capped off the air injection system can be safely removed. These Smog Block Off Plates are made from CNC'ed billet aluminum and feature the Graves Motorsports "G" logo. There are three reasons why you want to remove the air injection system from your bike;