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Exup servo problem

Exup servo problem

Anyone well clued in on Exups?My 99 r1s exup isnt opening til 4.5k,manual says it should be opening at 2k.Ive swapped out the servo for another and both wont open til 4.5k.The cables are smooth and ive put a complete new exup valve into it.Would it be a throttle position sensor misreading?Dont want ppl telling me to junk the exup etc,just want any clues on why the servo isnt opening til 4.5k?
Source: Exup servo problem