1978 Yamaha SR500 / XT500 Service Manual
Complete service reference for SR500(E) and XT500(C) models. Covers engine, chassis, electrical systems with precision specifications. Features carburetor adjustment, brake maintenance, clutch assembly procedures, and spark timing specifications.
Yamaha Models Covered & Key Technical Specifications
Models: Yamaha SR500(E), Yamaha XT500(C)
Sub-models / Variants: SR500E, XT500C
Model Years: 1978
Serial Numbers: SR500E 2J2-100101, SR500 2J4-000101
Technical Data:
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Engine displacement: 499 cm³
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Compression ratio: 9.0:1
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Intake valve clearance: 0.10 mm
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Exhaust valve clearance: 0.15 mm
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Idle engine speed: 1,100 r/min
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Engine oil capacity: 2.4 liters
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Fork oil quantity: 182 cm³ per leg
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Spark plug gap: 0.7–0.8 mm
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Front axle nut torque: 110 Nm
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Rear axle nut torque: 150 Nm
Yamaha Manual Features & Content Preview
1978 Yamaha SR500 and XT500 Factory Service Manual
- Covers 1978 Yamaha SR500(E) and XT500(C) models (serial ranges 2J2-100101 and 2J4-000101).
- Instant download PDF featuring a fully searchable OCR text layer—jump straight to torque specs in seconds.
- 122 pages of factory-specified maintenance data, electrical schematics, and component inspection criteria.
- Formatted for standard letter and A4 printing to keep pages clean on the workbench.
Getting these classic thumpers running right requires accurate baseline data. This 1978 first-edition manual outlines the exact inspection parameters for the air-cooled 499cc engines. Inside, you get direct reference data for carburetor float level adjustments, ignition system diagnostics, and chassis wear limits. Since vintage motorcycle components must meet strict tolerances to operate safely at highway speeds, always verify your front forks and disc brake assemblies against these factory specs before taking a test ride.
You will not find generic teardown advice here. The reference tables deliver the hard numbers needed for a professional mechanic or serious DIYer. This includes critical valve and rocker arm clearances, complete fluid capacity charts, and precise electrical baselines like stator coil resistance and magnetor outputs. With the instant download ready immediately after checkout, you can pull up the required cylinder head bolt torque values on your tablet right at the bench. As an authentic OEM service publication, this document delivers the specific mechanical guidelines originally issued to Yamaha dealer technicians.
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