1987-1990 Yamaha Exciter 570 Snowmobile Service Manual (P/N 82M-21741-00-00)
578 Pages • 49.22 MB • Instant, Printable PDF
Yamaha Models Covered & Key Technical Specifications
Models: Yamaha Exciter 570
Sub-models / Variants: Exciter, Exciter L/C, Exciter U/C
Model Years: 1987–1990
Serial Numbers: 82M-000101 and up
Technical Data:
- Engine displacement: 570 cc
- Cylinder bore (Standard): 73.00–73.02 mm
- Cylinder bore (Wear Limit): 73.5 mm
- Ignition timing: 1.5 mm (0.06 in) B.T.D.C.
- Idle speed: 1,400–1,600 r/min
- Spark plug: BR9ES (NGK)
- Spark plug gap: 0.7–0.8 mm (0.028–0.031 in)
- Drive V-belt length: 1,099 mm (43.3 in)
- Engine oil: YAMALUBE 2
- Coolant: High quality ethylene glycol, 60:40 water mix ratio
Yamaha Manual Features & Content Preview
This original OEM publication (P/N 82M-21741-00-00) serves as the official baseline for the 82M-series chassis build and liquid-cooled engine tuning protocols. Spanning 578 pages, the reference thoroughly documents engine, chassis, electrical, and carburetor specifications for 1987–1990 Yamaha Exciter 570 models. This includes both L/C and U/C variants.
- Contains 47 exploded-view diagrams mapping out critical mechanical assemblies.
- Details comprehensive ignition timing and precise clutch tuning data.
- Outlines exact engine, cooling, and power train maintenance benchmarks.
Manual Organization and Content
This factory publication delivers the exact technical data required for servicing vintage Yamaha snowmobiles. Chapters break down periodic inspections for engine components, suspension tuning, and power train settings. This includes primary and secondary sheave adjustments. You will find detailed sections outlining coolant system maintenance, engine removal, and complete cylinder overhaul sequences. Engine assembly coverage highlights essential benchmarks, such as crankshaft runout inspections and piston-to-cylinder clearances. Because snowmobile maintenance involves handling pressurized cooling systems and heavy mechanical components, always ensure proper lifting techniques are used and system pressure is safely relieved before starting work.
Specification and Tuning Reference
Rely on exact factory numbers. Technical specifications include cooling system pressures, drive chain oil capacities, and torque settings for every critical fastener. Standard cylinder bore values are defined at 73.00–73.02 mm, with a strict maximum wear limit of 73.5 mm. Need altitude adjustments? The carburetor data covers the B44-36 Mikuni standard, outlining exact main jet selections for varying elevations. Additional reference tables define brake pad wear limits, spark plug gaps, and precise secondary sheave offset adjustments required for optimal track power delivery.
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