Hissing Noise. Please Help




#1
I have a 2006 Hayabusa that has 11k on it. The problem Im having is that everytime I hit the throttle I hear a hissing noise from somewhere in the front of the bike. When I let the throttle go the noise stops. What could be the problem
 

IG.

Registered
#2
When you open the throttle the engine sucks in more air, creating stronger vacuum than during idle. If there is a loose vacuum hose anywhere, you hear a sound. There aren't too many vacuum hoses. Lift the tank and inspect all small hoses. Actually, lift the tank, support with a prop, and start the engine. See where the sound comes from - maybe you will get an idea. Also, the bottom of the air box has a vacuum hose to control the opening of the air box passage. So, check that, too. Did you do any maintenance recently?
 

IG.

Registered
#4
Another crazy possibility: the exhaust leak in the headers area. Unless you just installed a new exhaust system, pretty unlikely.
 

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