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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Compatible with the Ninja 500
Perfect fit on the Ninja 500 even though you can tell it was marketed for the Ninja 400. Plate is perfectly machined, and the airbox plug fit nice and snug. No complaints, would be nice to see this kit paired with a PAIR valve connector eliminator/plug but I just ended up ordering that off TST. Even though the plug is secure and very snug, I still put a hose clamp on it.
- Availability:
- STG Part Number:
- G|1572-AB020|1
- Manufacturer's Part Number:
- 1
