Graves Motorsports Smog Block Off Plates for the Yamaha FZ-09. 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 a set (to complete 1 bike install).
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.
Graves Yamaha FZ-09 Smog Block Off InstructionsWrite Review
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Great Product
Easy to install and performed the way I expected. Installed with a Vcyclenut flashed ECU with the AIS eliminated. No more popping and cracking on deceleration.
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Works as advertised
Before installation, I had the AIS system disabled through the ECU and thought I didn't need anything further. There were still pops if I hold the RPM high for a bit then shift up (quickshifter). This issue seems to have gone away after I installed these plates. The weight reduction, although very minor, is also a great plus. I'm not sure why it would make a difference if I add the plates if the system was already disabled, but it did and I'm happy I installed this. Installation is easy enough. Basically only need 3-4 basic tools to do the entire thing. Need to remove fuel tank and air box.
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Good product
Friendly Video Cool Products
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FZ-09 Block Off Plates
Brian's video made the installation stress free. The bike runs much better with them.
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No more popping on decel
Recently put on the M4 slip on on my 2016 FZ09, installed the block off plates and a Power Commander V - No more popping on decel or part throttle, runs stock smooth and better, more torque and power, you can feel the difference!
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Graves FZ-09 Block Off Plates
Very fast shipping from STG! Great product easy to install STG video is very helpful.
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Graves Yamaha FZ-09 Smog Block Off Plates
The product is perfect as the explanations I was satisfied now I have to try the bike thanks
- Availability:
- STG Part Number:
- G|1572-AB015|0
- Manufacturer's Part Number:
- 1
