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).
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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Won't Know until racing season starts.
Thanks to Brain for the video, helped with the install.
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Ian Whitehead
Ian Whitehead
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Graves ninja 400 smog block off plate
Ok, the engraving on this plate looks awesome! Too bad nobody will see it! Be patient when you install it, you’ll need to remove the fuel tank and air box. The only thing about the kit is there is no resistor included to go to the factory harness to avoid getting a check engine light. I was able to source a resistor to avoid that, but just keep that in mind when purchasing this kit—-Resistor needed!
- Availability:
- STG Part Number:
- G|1572-AB020|0
- Manufacturer's Part Number:
- 1
