Graves Motorsports Smog Block Off Plate for Honda
Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (aka 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 AIS can be removed. These are billet CNC Smog Block Off Plates that feature the Graves Motorsports “G” logo.
There are three reasons why you want to remove the air injection system from your bike:
- 1. Racing Use: You will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance.
- 2. Accurate AFR when dyno testing. The AIS pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the AFR is altered by the extra “fresh air” in the exhaust stream. By removing the air injection system you can achieve an accurate air-fuel ratio.
- 3. This helps reduce popping on deceleration. Note: proper tuning may be needed and this is general feedback.
`19-22 Honda CRF 450L/RL/X
Availability: In stock
Sold as 1 plate shown. This product is intended for closed course competition use only. Use of this product for any other purpose is strictly prohibited.