Graves Smog Block Off Plates - Yamaha R1 - Fits 2004 to 2008 Models

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Average Customer Rating: 3.5 out of 5 (based on 1 rating)

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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meh

By Anonymous

Pros: The product itself is great. My BF is really impressed with the plates I bought him.

Cons: Has to be ordered from the manufactuer so takes about a week to get if you pay the extra money for 2 day shipping. Who knows how long if you pay the ground shipping. But the product itself is worth the wait.

Knee draggers is the best website for ordering your bike parts because you can easily track your orders, and they have numerous items that have free ground shipping. They also reward you with puck bucks every time you buy. Even if you do have to wait a little longer for your stuff, it is worth it. They are much cheaper than other sites like Dennis Kirk.

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Average Customer Rating: 3.5 out of 5 (based on 1 rating)

Reviewed By 1 Customer:

view all reviews (1) | write a review

meh

By Anonymous from Anytown, USA

Pros: The product itself is great. My BF is really impressed with the plates I bought him.

Comments: Knee draggers is the best website for ordering your bike parts because you can easily track your orders, and they have numerous items that have free ground shipping. They also reward you with puck... (Read the rest of this review)

1 of 3 people found this review helpful.

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