Positioning:
The definitive factory service manual for owners and technicians of the 1971 Harley-Davidson Sportster XLH, providing authorized repair procedures.
Comparison:
Surpasses aftermarket manuals in accuracy and detail, directly reflecting Harley-Davidson's engineering specifications and repair methodologies for the era.
Features:
Official factory data, detailed illustrations, comprehensive diagnostic flowcharts, and specific torque values.
Engine:
Engine disassembly, assembly, tuning, specifications, troubleshooting, and overhaul procedures for the 1971 Sportster engine variants.
Transmission:
Service and repair of the Sportster transmission, including clutch, gear engagement, and maintenance.
Fuel System:
Carburetor (likely Linkert or S&S variants), fuel tank, fuel lines, and pump servicing and adjustment.
Ignition System:
Magneto or battery ignition system servicing, timing, component testing, and troubleshooting.
Electrical System:
Wiring diagrams, battery, generator/alternator, lighting, charging system, and starter motor service.
Brakes:
Front and rear brake system inspection, adjustment, and repair (likely drum brakes).
Suspension:
Front fork (likely leading-link or telescopic) and rear shock absorber service, adjustment, and rebuilding.
Frame And Body:
Frame inspection, alignment, and body panel repair and maintenance.
Wheels And Tires:
Wheel bearing service, tire inspection and replacement, and spoke tensioning.
Maintenance:
Routine maintenance procedures, lubrication, fluid changes, filter replacement, and tune-ups.
Troubleshooting:
Diagnostic guides and common problem identification for various systems.
Repair Overhaul:
Detailed step-by-step instructions for engine, transmission, and component overhauls and repairs.
Adjustments:
Carburetor, ignition timing, clutch, and brake adjustments.
Depth:
In-depth technical information suitable for professional mechanics and experienced DIY enthusiasts, covering full rebuilds and advanced diagnostics.
File Format:
Print (Original Factory Format)
Print Quality:
High-quality reproduction of original factory printing, ensuring clarity of text and diagrams.
Binding Type:
Likely perfect binding or saddle-stitch, mimicking original factory manual construction.
Paper Type:
Durable paper stock suitable for workshop environments.
Engine Type:
Air-cooled, OHV, V-twin (Ironhead Sportster)
Displacement:
Approximately 55 cubic inches (900cc) for the XLH variant.
Bore X Stroke:
Typically 3.1875 in. x 3.375 in. (81 mm x 85.7 mm).
Compression Ratio:
Around 8.0:1 (varies slightly by year and specific variant).
Horsepower:
Approximately 55-60 hp at 5800-6000 RPM (estimated).
Torque:
Approximately 55-60 lb-ft at 4000-4500 RPM (estimated).
Carburetor Type:
Likely Harley-Davidson Linkert M74B or similar, or potentially S&S Super E/G models (later aftermarket).
Fuel Type:
Leaded gasoline, typically with an octane rating of 91-93.
Oil System:
Total loss oiling system with oil tank separate from crankcase.
Oil Type:
Specialized motorcycle engine oil, typically SAE 50 or 60 weight. Harley-Davidson recommends specific grades.
Oil Capacity:
Approximately 3 quarts (2.8 liters) for the engine and oil tank combined.
Type:
4-speed constant mesh, foot-shifted, hand-clutched.
Optional Transmissions:
None for the 1971 factory model; 4-speed was standard.
Clutch Type:
Dry, multi-plate clutch, operated by hand lever.
Gear Ratios:
Specific gear ratios are detailed in the manual for each gear. Example: 1st gear ~2.44:1, 4th gear ~1.00:1.
Final Drive:
Chain drive (428 or similar heavy-duty chain).
Fluid Type:
Gear oil, typically SAE 75W-90 or SAE 80W-90.
Wheelbase:
Approximately 59.0 inches (1499 mm).
Length:
Approximately 88.0 inches (2235 mm).
Width:
Approximately 30.0 inches (762 mm).
Dry Weight:
Approximately 460 lbs (209 kg).
Gross Vehicle Weight Rating:
Typically around 800 lbs (363 kg).
Infotainment Features:
None. This era of motorcycle predates modern infotainment systems; focus is on mechanical function.
Driver Assistance Systems:
None. Relies solely on rider skill and mechanical feedback.
Connectivity Features:
None. Purely mechanical operation.
Oil Change:
Every 2,000-3,000 miles or annually, whichever comes first. Total loss system requires regular top-ups.
Engine Tune Up:
Recommended every 3,000-5,000 miles, including spark plug replacement, ignition timing, and carburetor adjustment.
Chain Adjustment:
Check and adjust final drive chain tension every 1,000 miles.
Valve Lash Adjustment:
Recommended every 5,000-7,000 miles or as needed based on engine performance.
Engine Oil Viscosity:
SAE 50 or SAE 60 (refer to manual for specific Harley-Davidson recommendations).
Transmission Fluid Viscosity:
SAE 75W-90 or SAE 80W-90 gear oil.
Carburetion:
Linkert carburetors can be finicky and require precise adjustment; common leaks and worn jets.
Electrical System:
Wiring loom degradation, generator charging issues, and starter solenoid problems are common with age.
Engine Sealing:
Oil leaks from crankcase seals and rocker box gaskets are prevalent on Ironhead Sportsters.
Suspension:
Fork seal leaks and worn rear shock absorbers can affect ride quality and handling.
Primary Chain Tensioner:
Wear in the primary chain tensioner can lead to chain slap and premature wear.
Heritage:
Harley-Davidson, founded in 1903, has a long-standing legacy in American motorcycle manufacturing, with the Sportster line being a cornerstone model.
Sportster Origin:
The Sportster line debuted in 1957 as a response to British competition, evolving significantly over the decades. The 1971 models represent a maturing of the original design.
Manufacturing Location:
Milwaukee, Wisconsin, USA.
Production Period:
The XLH model was in production during the early 1970s, building upon the legacy of the Sportster.
Collectible Status:
Highly collectible and iconic motorcycle, recognized for its raw performance and classic American styling.
Motorcycle Magazine Reviews:
While specific awards for the 1971 model may not be documented, contemporary reviews lauded the Sportster's power and handling for its time.
Certification Standards:
None beyond adherence to Harley-Davidson's own manufacturing and quality standards.
