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strange noise

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after installing a gytr AIS removal kit on my 07 wr, i noticed a quiet, high pitched whistling sound coming from the engine area on the bike. the only thing i can imagine it would be is a small exhaust leak in the silver cap i installed...but i tightened the hose clamp around it pretty tight, so im not sure if that's where the noise is coming from. any ideas?

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High pitch whining usually indicates a vacuumme leak. Try spraying carb cleaner on the area while the bike is running. If the engine speeds up, you have found the leak. Hope that helps

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well its not really a whistling sound...its more of high pitched tapping sound that goes at the same rate as the exhaust noise. i can only hear it at idle or very low rpm. and the bike never made this sound before i installed the AIS removal kit

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I could just be your carb's slider/throttle valve, when air is sucked in, it vibrates - it's normal if that is the noise that you're hearing...

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