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I recently bougth a gsxr 1000 k1 that wont run as it should. When i first got it it bogged at 6-7k rpm, and pulled like a weak 600. After some rides it starts feeling worse. Last ride i got 50mph and the bike bogged out when i twisted the throttle. The bike had a full yoshimura exhaust and pc3 usb. Disconnected the pc3, changed spark plugs, cleaned fuel tank, cleaned fuel filter/pump, new gas, and cleaned injectors. Tested the fuel pump and tested all 4 ignition coils, all within spec from the manual. The bike runs good at idle, no fi light.
Any suggestions? Im thinking maybe a bad ignition coil or a wiring problem.
 

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Welcome to the forum.

Do a fuel flow and pressure check as per the service manual.
 
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