Graves Motorsports Smog Block Off Plates for Yamaha and Kawasaki 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
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 two 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.
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Great Product
came quick, fit perfectly
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Good quality
This Part fits perfectly in my 2016 Yamaha R6 deleting that big clunky air injection system, comes bolts as well.this is a must if you want a proper tune
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Quality construction, removes popping on decel
If you have anything more than a slip-on on your bike, you'll need some block-off plates. Graves makes quality parts, so you can trust these. They keep my bike from popping on decel, but be careful when installing them: the screws I received with the plates were too long, which didn't let them create a perfect seal. You'll know if you have this problem because there will be a lot of noise coming from under the air box once you turn the bike back on. Some red thread locker and shorter screws did the trick though.
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Solid products
Cheap, effective and high quality parts
- Availability:
- STG Part Number:
- G|1572-AB011|1
- Manufacturer's Part Number:
- 1
