When you switch my thunderace ignition on it should run a check where the rev counter goes up to 7000 rpm, mine dosent do this what is the problem and how easy is this fixed?

Mine is a Yamaha YZF1000 1996
Taco code 3 fault is related to the TPS Sensor located on the RHS outter carburettor.
Taco code 7 is related to the EXup valve issue's loose/damaged
Taco code 9 relates to the fuel level sensor & the cable under the tank unplugged.
Also see visor down site

I would check and adjust the static ignition timing as if too far retarded it will tend to misfire at mid range revs. and suffer from lack of power at the top end.

that is the indication of the exup valve malfunctioning. it tosses the code of 7000 rpm for a few seconds on start up to let you have an indication that there is a problem.

This is a diagnostic code telling you there is a problem with the exup valve and/or servo, cables etc. Take the little cover off the exup valve and check the pulley is rotating about 1/3rd of a turn when the revs hit more than 4000 revs. It might be partially seized or a broken cable or problems with the servo. The mechanical bits are easy to fix.

This happens every time you first turn the bike on, just before you hit the start switch, right? That's normal...your bike has a "brain" that goes through a systems check when you turn the key.

7000 rpm is a self diagnostic code that either your exup valve is not being detected or the valve is locked up and not moving. If you put a header on your bike and took over the exup valve servo motor, you are going to have to put it back on. It also changes the mapping of the ECU and will not let it rev to redline when the Exup servo motor is missing.

The rev counter could be faulty.
I hope the engine is responding ok on accelaration inspite of the rev counter being stuck on 3000rpm , if so thn its definately the rev counter being faulty.

it might be a sticky frotal