Graves Motorsports Smog Block Off Plates for Yamaha model Sport Bikes. 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
Yamaha R1 / R1M / R1S 2004-2016 + R6 2003-2016 + R6S 2006-2009 + FZ1 All + FZ8 All + FZ6 All
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;
1. If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.
2. To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra "fresh air" in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio.
3. This addition will typically remove the majority of popping on deceleration that can be experienced with un-burnt gasses within the emission charcoal chamber. Note: Proper tuning may be needed and this is general feedback.
Author: Chuck Giacchetto
These pieces are mandatory for all R6 guys. With the lack of space under the tank from the stock smog pump you now have ample room to do maintenance as needed in between outings. Plus you won't cut your hands open on those pesky clamps that hold the smog hoses on anymore either! Thank You!
Cool. Gonna try it out.
they say these work for zx14's, however, the airbox plugdoes not fit, i actually ended up making one out of hose,and a wooden dowel;plate mounting holes were spaced too far apart, had to be taken to machine shop so they could be mounted. may work great on a yamaha, but i know it wasnt an easy go for the kawi.
i have a 2005 zx10r and i put my smog plates n today. i took about two and a half hours. it was not to herd to do,but there is not much space to get air induction system out but putting the block off plates in is a breeze alot more room with ot the stock system....also makes a lot mor room to get spark plugs out/in