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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
If it were carburetted one would say it was bogging down at low revs and this would be caused by the mixture being too rich. But being an FI bike I presume, then best bet is to have a dealer or good bike mechanic check for fault codes before you start looking for and fixing things that might not need fixing.
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.
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.
Replace standard rings with GTS1000 rings . I had Fzr1000 with same problem , at 187000 kms I pulled the barrels off and found no hone left , it was a smooth bore . Also replaced valve guide seals at this time also . Oil consumption dropped from 1 litre per 1000kms to 1 litre per 8000kms. Bike has now done 308000kms and still uses oil at the rate of 1 litre per 4000kms .
Hi There, Got this from my copy of the Yamaha workshop manual for this model
The YZF-R1 features a self-diagnosing system for the following circuits: 1. throttle position sensor 2. EXUP 3. fuel level indicator light if any of these circuits are defective their respective condition codes will be displayed on the tachometer when the main switch is set to "ON" (irrespective of whether the engine is running or not)
1. throttle position sensor a) Disconnected b) Short-circuit c) Locked 0 - 3,000rpm 2. EXUP a) Improper connection b) Short-circuit c) Servomotor is locked 0 - 7,000rpm 3. Fuel level indicator light a) Improper connection 0 - 8,000rpm
It looks like you have a problem with the EXUP Valve on yours, probably seized or maybe cables not moving freely Hope this Helps
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