Loss of High End HP





GSXRme

Registered
at about 8000+ RPMs I hear a whistling sound and it sounds somewhat like my horn. I beleave its my pair valve block off gasket. The bike has just hit 15,000 Miles and the block offs have been on there since day 1

any Ideas?

The motor is about to be dropped anyways. Well as soon as Dennis the Turbo Man Delivers.

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turbojonn

Registered
I was going to say check your cam position sensor and ask you if you have degreed cams until I read the part about the whistling. Somebody will know this one.
 

Quasar

Registered
On a naturally aspirated Hayabusa engine, you would never feel any loss of HP due to a pair valve block-off leaking.

If however, your engine is turboed, that would not hold true. A leaking pair block-off would provide a loss of exhaust pressure (hence a whistling sound), which pressure otherwise spins the turbo. If this were the case however, your boost gauge should show somewhat lower boost pressure than usual.
 

Quasar

Registered
(GSXRme @ Sep. 22 2006,17:43) could the horn be making the sound form small motor vibes? Just started at 14,000 miles

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If you still seriously think it's your horn making the sound, simply disconnect its wires and physically remove the horn from your bike for a couple high-speed runs. This way you'll know for certain it isn't horn related.
 

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