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so i bought an 05 zx6r about 2 months ago and its been riding fine. the other day i was riding home from work and i got the fi light. i ran the codes and got error 63. it has a yoshi slip on and and i know this is because of the butterfly valvee malfunction. i just want to know how to fix it and why it was fine before. usually it seems like the fi light only comes on right when the slip on is installed. thanks for the help
 

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Take your seat off and see what the servo is doing. Slipons eliminate the valve and cables but not the servo. The slipon manufacture will provide a metal stop to trick the computer to think that valve is there because of the stops. That piece of metal came off or your servo has broke. If the servo broke you might as well get a servo buddy.
 

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servo

i had the same problem..i just so happened that i had my buddy who has his own bike shop, adjust my valves and he noticed the FI light on and he simply removed the servo and bypassed it...problem solved...
 
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