Hey spigga, nice idea with the back-up top. Silicone probaly won't fail you anyway. The main reason I done this (weld the hole up) is that I got the plastic welder for x-mas and just had to try it.
USMCbusa, from what I have read the air box mod is for people that have modified their bikes from stock. Meaning they have a full aftermarket exhaust systems (not slipons) usually 4-2-1 set-ups, k&n or bmc air filters, TRE, and of coarse power comanders. Basically you open up the airway that feeds this beast of a motor. Take out your air filter and see how small the rectangular hole is that the intake is. You will see that there is a triangular shaped area, where the rectangular hole is glue or welded in. This is what comes out. In conclusion, you are going to double the size of the air opening that feeds your busa. This results in more "potential for power" if you have the right amount of fuel to use it. I will let you guys know when I test to give my opinion, raining outside 100%
2001 Suzuki Hayabusa prowler flaming orange pearl, viper black, and chrome decals. *10,272 miles and counting
Micron 4-2-1 race baffle system
Power Comander
K&N air filter
Big air box mod.
kickstand mod.
pair valve eliminated