xvii Chapter 23 Power Transmission Overhaul . . . . . . . . . . . . . .509 Primary Drive Service and Repair. . . . . . . . . . . . . . . . . . . . 509 External Primary Chain Drive Service. . .509 Internal Primary Chain Drive Service . . . 510 External Primary Gear Drive Service . . . 510 Internal Primary Gear Drive Service. . . . 511 Clutch Service and Repair . . . . . . . 511 Clutch Basket, Bearing, and Hub Wear . . . 511 Drive and Driven Plate Service . . . . . . . 513 Clutch Spring Service . . . . . . . . . . . . . . 513 Primary Kick-Start System Inspection. . . 514 Primary Drive and Clutch Inspection Summary . . . . . . . . . . 514 Primary Chain Drive . . . . . . . . . . . . . . . 514 Primary Gear Drive . . . . . . . . . . . . . . . . 514 Clutch Basket . . . . . . . . . . . . . . . . . . . . 515 Clutch Hub . . . . . . . . . . . . . . . . . . . . . . 515 Clutch Pressure Plate . . . . . . . . . . . . . . 515 Clutch Center Bearing or Bushing . . . . . 515 Clutch Drive Plates . . . . . . . . . . . . . . . . 515 Clutch Driven Plates . . . . . . . . . . . . . . . 515 Clutch Springs . . . . . . . . . . . . . . . . . . . 515 Primary Kick-Start System . . . . . . . . . . . 515 Centrifugal Clutch Service and Repair . . . . . . . . . . . . 516 Clutch Drum. . . . . . . . . . . . . . . . . . . . . 516 One-Way Bearing . . . . . . . . . . . . . . . . . 516 Clutch Shoe Assembly . . . . . . . . . . . . . 516 CVT Service and Repair . . . . . . . . . 516 Front Fixed Drive Face. . . . . . . . . . . . . . 517 Variator . . . . . . . . . . . . . . . . . . . . . . . . 517 Rollers and Drive Plate . . . . . . . . . . . . . 517 Rear Fixed Driven Face . . . . . . . . . . . . . 517 Movable Outer Face . . . . . . . . . . . . . . . 517 Centrifugal Clutch and Drum. . . . . . . . . 517 Belt Inspection . . . . . . . . . . . . . . . . . . . 517 Drive Belt Problems . . . . . . . . . . . . . . . 518 Primary Drive and Clutch Reassembly . . . . . . . . . . . . . . . . . . . 519 Transmission Service and Repair. . . . . . . . . . . . . . . . . . . . . . . . 520 Shaft End Play . . . . . . . . . . . . . . . . . . .520 Shift Mechanism Operation. . . . . . . . . .520 Transmission Disassembly . . . . . . . . . .521 Transmission Inspection . . . . . . . . . . . .521 Transmission Measurements. . . . . . . . .522 Transmission Reassembly . . . . . . . . . . .522 Final Drive Service and Repair. . . 524 Chain Drive Inspection, Service, and Repair . . . . . . . . . . . . . . . . . . . .524 Belt Drive Inspection, Service, and Repair . . . . . . . . . . . . . . . . . . . .526 Shaft Drive Inspection, Service, and Repair . . . . . . . . . . . . . . . . . . . .527 Half Shafts and ATV Axles . . . . . . . . . . .529 Final Drive Problems. . . . . . . . . . . . . . .529 Chapter 24 Tune-Up and Periodic Maintenance . . . . . . . . . . 533 What Is a Tune-Up? . . . . . . . . . . . . . 533 Inspection. . . . . . . . . . . . . . . . . . . . . . 534 Computer Control System Check . . . . . . . . . . . . . . . . . . . . . . . . 534 Replacing Air and Fuel Filters . . . 535 Battery Inspection . . . . . . . . . . . . . . 535 Checking the Cooling System . . . . 535