Yamaha MBK MW125 2014 Service Manual

PERIODIC MAINTENANCE3-72. Check:• Cylinder head breather hose “1”• Transmission case breather hose “2”Cracks/damage → Replace.Loose connections → Connect properly.NOTICEECA21600Make sure the cylinder head breather hoseand transmission case breather hose arerouted correctly.3. Install:• Storage box• Center panelRefer to “GENERAL CHASSIS (1)” on page4-1 and “GENERAL CHASSIS (2)” on page4-3.EAS31017CHECKING THE ENGINE IDLING SPEEDTIPPrior to adjusting the engine idling speed, the airfilter element should be clean, and the engineshould have adequate compression.1. Start the engine and let it warm up for severalminutes.2. Check:• Engine idling speedOut of specification → Go to next step.3. Check:• ISC (idle speed control) learning value“00” or “01” → Check the intake system.“02” → Clean the ISC (idle speed control) unitand throttle body.Refer to “CLEANING THE ISC (IDLE SPEEDCONTROL) UNIT AND THROTTLE BODY”on page 7-9.▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼a. Connect the Yamaha diagnostic tool.Use the diagnostic code number “67”.Refer to “SELF-DIAGNOSTIC FUNCTIONAND DIAGNOSTIC CODE TABLE” on page9-5.b. Check the ISC (idle speed control) leaningvalue.▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲ ▲▲▲▲ ▲▲▲EAS31180CHECKING THE THROTTLE BODY JOINTAND INTAKE MANIFOLD1. Remove:• Storage boxRefer to “GENERAL CHASSIS (2)” on page4-3.2. Check:• Throttle body joint “1”• Intake manifold “2”Cracks/damage → Replace.Engine idling speed1500–1700 r/min12Yamaha diagnostic tool90890-0323112