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.
Write Review
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I think putting on blockoff plates may be about my least favorite thing
but these were very good quality
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Does the job
Works, perfectly, as intended.
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Great product
It’s not much to say it is a great product I love the black finish
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Good fit
Excellent product, fits without any problems.
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Must have
When you buy a 3/4 or full exhaust this should be the purchased with it. Hands down like peanut butter and jelly. Stops the deceleration popping and easy to install with just Allen wrench’s. Saw Brian’s video did it in like 20-30 minutes. A must have.
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Good job graves
Excellent product and pretty straight forward with the instructions I recommend this product if they have 2015-2015 Yamaha yzf-r1 notice night and day differences with out a doubt
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Graves!!!
As always STG with fast shipping... Block-off plates are easy to install with a lil mechanic skills..
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Blockoff Plates
Perfect fit Work great
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Very Impressed
As always, STG were helpful in answering all my questions on these and shipped them out very quickly. Product was easy to fit. I also fitted a power commander and had it dyno tuned which has reduced popping significantly.
- Availability:
- STG Part Number:
- G|1572-AB011|0
- Manufacturer's Part Number:
- 1
