1970-1978 Harley-Davidson Sportster XL / XLH / XLCH / XLT-1000 / XLA Service Manual

1970–1978 Harley-Davidson Sportster Service Manual

• This 235-page factory publication (P/N 99484-78) details 1970–1978 Harley-Davidson Sportster XL, XLH, XLCH, XLT-1000, and XLA models equipped with the 1000cc V-twin engine
• Contains over 70 exploded-view component diagrams, including detailed chassis, engine, and brake assembly schematics
• Provides the official reference for the complete model run, documenting the evolution from early XLH/XLCH variants through the 1976 XLT and 1978 specifications
• Delivered instantly as a fully searchable, OCR-processed PDF—jump directly to torque specs or wiring diagrams by keyword right from your device

Contents Overview

This manual delivers a comprehensive breakdown of mechanical systems and maintenance schedules. The structure starts with general product specifications, moving into dedicated sections for the chassis, engine, transmission, and electrical systems. Each chapter groups components into sub-assemblies for fast reference in the shop. It outlines the scope of cleaning, inspection, removal, and installation for major assemblies like the cylinder head, piston sets, and gearbox. The text also highlights specific lubrication intervals, fastener torque requirements, and troubleshooting charts for fuel and ignition systems. Always ensure your workspace is well-ventilated and properly secure the motorcycle on a lift or stand before beginning any mechanical teardown or inspection.

Key Specifications

The technical data sections provide comprehensive torque tables for both engine and chassis fasteners. You will find fluid capacity charts for fuel, oil, and transmission reservoirs, alongside detailed electrical wiring diagrams. For example, the cylinder head specification table lists intake valve clearance at 0.11–0.20 mm, while engine assembly data dictates cylinder head bolt torque at 65 ft-lbs. The oil tank capacity is specified as 3 quarts across the maintenance schedule. As a complete factory service publication, this download serves as the definitive reference for servicing the 1000cc V-twin powertrain and associated chassis components.