It sounds like you're talking about the TPS... Just unplug it, DO NOT UNSCREW the sensor. This has a tamper TORX head for that very reason. It is set at the factory and removal could prevent your bike from making any power of any use...

I'm not sure this is what you mean so apologies if it isn't, just thought it sensible to warn you incase it was!
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NSR300R - Why did i ever have a 250...