Had a '07 GSXR750K come in and it was not making any power over 4000rpm, and running really lean . . .
Turned out all 4 inlet manifold intake rubbers that bolt to the cylinder head and house the throttle bodies had all totally separated away from the base plate, and you could grab the throttle bodies and lift them up and down about an inch ! ! !
None of us had ever seen this before but I can tell you the rubber was as hard as a hard thing, even harder!
Replaced all the intake rubbers, reassemble everything and it ran mint
Heres some pics.
Below, see the gap when t/bodies are lifted?
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Below, this when they are resting with only gravity holding them down
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Unbelievable . . any one got any idea what would cause this?
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below is the original before replacement with new one
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below is the new one to be fitted.
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Here's the bike . . .
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