Yamaha Enticer II 570 Snowmobile Service Manual Set, 1991–1993 (P/N LIT-12618-01-42 for 1993)

Both manuals cover scheduled maintenance and major repair. Use the section for your model when checking starter configuration, carburetor setup, or clutch specifications.

Full-machine wiring sheets are included for EX570R and EX570ER. The 1993 manual includes circuit diagrams and troubleshooting in Chapter 8. Its specifications section ends at printed page 9-23, before the three full-machine wiring sheets listed for EX570/EX570SX, EX570E, and EX570ST. For EX570S and EX570ES, use model-specific service documentation.

PDF Search, Navigation, and Page Count

Text search and wiring diagrams: Both manuals have searchable OCR text and chapter bookmarks. Zoom in to read small connector labels and wire-color codes. OCR can misread short labels, so use the diagram itself to confirm them.

One printable English PDF contains 442 pages, including two additional cover sheets.

Engine, Clutch, Chassis, and Electrical Service

This selection of workshop topics illustrates the coverage. The manuals also include pre-operation and seasonal maintenance schedules and model-specific cable-routing drawings.

• Engine overhaul: Engine removal and installation, crankcase and crankshaft service, inspection of cylinders, pistons, rings, and bearings, and recoil-starter overhaul.
• Cooling and lubrication: Coolant-flow diagrams, water-pump and thermostatic-valve service, cooling-system bleeding, and Yamaha Autolube pump adjustment and air bleeding.
• Clutches and final drive: Primary and secondary sheave service, V-belt inspection, sheave alignment, drive-chain housing and jackshaft repair, and disc brake overhaul.
• Steering, suspension, and track: Steering-column and linkage service, ski and runner inspection, front-suspension and slide-rail disassembly, front-axle removal, track adjustment, and chassis lubrication.
• Fuel and tuning: Separate VM38 and SX TM38 carburetor procedures, fuel-level adjustment, fuel-pump testing, SX carburetor synchronization, and high-altitude tuning charts.
• Electrical diagnosis: Electric-start and charging-system tests, ignition and throttle override system (T.O.R.S.) checks, and troubleshooting for lighting, warning circuits, and grip and thumb warmers.

The manuals are suited to service technicians and experienced owners with a properly equipped snowmobile workshop. Engine and clutch overhaul call for precision measurement and special tools, and electrical diagnosis uses a test meter.

Clutch Setup and Chassis Adjustments

Exploded and sectional views show the primary and secondary sheaves, drive-chain housing, and jackshaft. The adjustment sections cover sheave center distance, offset, and free play, along with chain slack, track tension, and alignment. Tuning charts provide model-specific clutch weights, springs, gearing, suspension settings, and carburetor jetting.

The clutch chapters call for keeping threadlocker off the primary-sheave bushings and supporting the assembly securely during spider service. The spring-loaded sheaves and raised track require the appropriate holding tools and supports.

Starting, Charging, and Ignition

The EX570R uses recoil start. The EX570ER and EX570ET have electric and recoil start. The electric-start sections cover battery and fuse checks, starter-motor inspection and overhaul, and rectifier and charging-system tests.

The troubleshooting charts pair symptoms such as weak spark or a battery that fails to charge with continuity and resistance checks. This gives you a sequence for testing the wiring and components before replacing parts. The charging sections also warn that disconnecting the battery while the generator is running can damage the rectifier and regulator.

Factory Tools and Workshop Reference Tables

The special-tool lists identify the fuel level gauge (90890-01312 / YM-01312-A), cooling system tester (90890-01325 / YS-22460-01), primary sheave holder (90890-01701 / YS-01880), clutch spider separator (90890-01711 / YS-28890-B), and pocket tester (90890-03112 / YU-03112).

Reference tables cover component torque, lubricants and capacities, wear limits, and assembly clearances. The cooling and engine chapters pair coolant-flow and line diagrams with service procedures and internal engine inspection data.

Sample Clutch and Engine Specifications

For primary-sheave spring inspection, the 1993 manual lists a free length of 76.5 mm for EX570T and EX570ET, 85.4 mm for EX570STT, and 78.7 mm for EX570SXT.

For those same models, the engine specifications give a piston-to-cylinder clearance of 0.070–0.075 mm and an upper limit of 0.10 mm.