Yamaha TMAX 2020 Service Manual

3-9PERIODIC MAINTENANCEEAS30797SYNCHRONIZING THE THROTTLE BODIESTIPBefore synchronizing the throttle bodies, checkthe following items:• Valve clearance• Spark plug• Air filter element• Throttle body joint• Fuel hose• Exhaust system• Breather hoseChecking the throttle body synchronization1. Stand the vehicle on a level surface.TIPPlace the vehicle on the centerstand.2. Remove:• Bottom side cowling• Side panel• Bottom center cowlingRefer to “GENERAL CHASSIS (1)” onpage 4-1.• Center cover• Fuel tank cover assembly• Side cover• Rear side cowling assembly• FootboardRefer to “GENERAL CHASSIS (2)” onpage 4-11.• Fuel tankRefer to “FUEL TANK” on page 7-1.3. Remove:• Intake air pressure sensor hose “1”• Cap “2”4. Install:• Hose “1”(Parts No.: 5JW-24311-00)• 3-way joint “2”(Parts No.: 68V-24376-00)• Intake air pressure sensor hose “3”• Vacuum gauge “4”5. Install:• Fuel tankRefer to “FUEL TANK” on page 7-1.6. Check:• Throttle body synchronizationa. Start the engine, warm it up for several min-utes, and then let it run at the specified en-gine idling speed.b. Check the vacuum pressure.If out of specification  Adjust the throttlebody synchronization.21Vacuum gauge90890-03094VacuummateYU-44456Engine idling speed1100–1300 r/minDifference in vacuum pressurebetween the cylinders0 kPa–1.3 kPa (0 mmHg–10 mmHg, 0 inHg–0.4 inHg)2314