Yamaha YZF-R1B 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

PERIODIC MAINTENANCE3-104. Install:• Vacuum gauge “1”• Digital tachometer(Use goods on the market)5. Install:• Air filter caseRefer to “AIR FILTER CASE” on page 7-5.• Fuel tankRefer to “FUEL TANK” on page 7-1.6. Check:• Throttle body synchronization▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Start the engine, warm it up for severalminutes, and then let it run at the specifiedengine idling speed.b. Check the vacuum pressure.If out of specification → Adjust the throttlebody synchronization.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲Adjusting the throttle body synchronization1. Adjust:• Throttle body synchronization▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Start the engine, warm it up for severalminutes, and then let it run at the specifiedengine idling speed.b. There is a white paint mark on one of thethrottle body’s bypass air screw “1”.Use the throttle body as the base to syn-chronize the other throttle bodies by turningtheir bypass air screw in or out.ECA14B1039Do not turns the bypass air screw at thethrottle body which is the base for synchro-nizing; otherwise, the engine may runroughly at idle and the throttle bodies maynot operate properly.TIP• After each step, rev the engine two or threetimes, each time for less than a second, andcheck the synchronization again.• If a bypass air screw was removed, turn inthe screw fully and be sure to synchronizethe throttle bodies.• If the throttle body synchronization can notadjusted by the bypass air screw, clean orreplace the throttle bodies.• The difference in vacuum pressure betweenthe throttle bodies should not exceed 1.33kPa (10 mmHg).▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲2. Stop the engine and remove the measuringequipment.Vacuum gauge90890-03094Carburetor synchronizerYU-44456Engine idling speed1150–1250 r/minThe difference in vacuum pres-sure between the throttle bod-ies should not exceed 1.33 kPa(10 mmHg).Engine idling speed1150–1250 r/minManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk