Graves Motorsports Smog Block Off Plates for Honda CBR 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 ( as pictured).
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.
Write Review
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Great product.
They do their job great! Everything looks top-notch. Finish is good, fitment of course is excellent. If I could give one recommendation it would be to include four shorter screws, as the stock screws will be too long due to the thinner plates.
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17-19 CBR1000RR
Great quality! Easy to install and fast shipping. Highly recommend.
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Graves Block Off Plates, Not to bad
Fit like a champ, and the finish was very nice. Outside of not having bike specific instructions, a well made product. check the car they sent, maybe they have your bike, maybe not.
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Smog block off plates
Good quality and fast shipping
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Graves smog block off plate review
Very nice and easy to install good quality. Instructions were straight forward
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Smog block off plates
Very impressed with the quality. Nicely engraved but you'll never see it after its installed and bike is back together. Happy with my decision to delete the pair valve system and highly recommend this. Exhaust still pops on decel for me. Might be power commander map issue.
- Availability:
- STG Part Number:
- G|1572-AB017|5
- Manufacturer's Part Number:
- 1
