Yamaha YZF-R1 2007 Service Manual

THROTTLE BODIES7-6EAS26980CHECKING THE INJECTORS1. Check:• InjectorsDamage → Replace.EAS26990CHECKING THE THROTTLE BODIES1. Check:• Throttle bodiesCracks/damage → Replace the throttlebodies as a set.2. Check:• Fuel passagesObstructions → Clean.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Wash the throttle bodies in a petroleum-based solvent.Do not use any caustic carburetor cleaningsolution.b. Blow out all of the passages with com-pressed air.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS4S81001CHECKING THE FUEL PRESSURE1. Check:• Fuel pressure▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Remove the rider and passenger seat.Refer to "GENERAL CHASSIS" on page 4-1.b. Disconnect the fuel hose (fuel tank to pri-mary injector fuel rail) “1” from the primaryinjector fuel rail.WARNINGEWA4C81001Cover fuel hose connections with a clothwhen disconnecting them. Residual pres-sure in the fuel lines could cause fuel tospurt out when removing the hoses.c. Connect the pressure gauge “2” andadapter “3” to the fuel hose (fuel tank to pri-mary injector fuel rail).d. Start the engine.e. Measure the fuel pressure.Faulty → Replace fuel pump.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS27030ADJUSTING THE THROTTLE POSITIONSENSOR (FOR THROTTLE VALVES)1. Check:• Throttle position sensor (for throttle valves)Refer to "CHECKING THE THROTTLEPOSITION SENSOR (FOR THROTTLEVALVES)" on page 8-101.2. Adjust:• Throttle position sensor anglePressure gauge90890-03153YU-03153Fuel pressure adapter90890-03176YM-03176Fuel pressure324 kPa (46.1 psi) (3.24 kg/cm2 )Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk