Original Market Segment:
Custom cruiser, performance motorcycle, classic American V-twin.
Competitors 1981:
Other Harley-Davidson models, Japanese cruisers from Honda, Yamaha, Kawasaki, Suzuki.
Vehicle Distinguishing Features:
Iconic Shovelhead engine, low-slung custom styling, rider-focused ergonomics, robust V-twin performance.
Target Audience:
Harley-Davidson owners, mechanics, restoration specialists, enthusiasts.
Benefits For Owner:
Enables DIY maintenance, reduces repair costs, facilitates proper restoration and preservation, deepens understanding of the machine.
Engine Systems:
Engine disassembly, assembly, inspection, tuning, lubrication, cooling (air-cooled), ignition, fuel system (carburetion), exhaust.
Transmission Systems:
4-speed constant mesh transmission service, clutch operation and adjustment, primary drive and chain case.
Electrical Systems:
Wiring diagrams, battery, charging system (alternator/generator), ignition system (points and ignition module), lighting, instrumentation, starter motor.
Chassis And Suspension:
Frame inspection and repair, front forks (dampening, seals, travel), rear shock absorbers, swingarm, bearings.
Braking Systems:
Front and rear brake caliper service, brake line replacement, master cylinder and slave cylinder rebuild, brake fluid specifications, bleeding procedures.
Wheel And Tire:
Wheel bearing service, spoke tensioning (if applicable to certain spoke designs), tire mounting and balancing, wheel alignment.
Bodywork And Trim:
Fender removal and installation, fuel tank mounting, seat assembly, handlebars, controls, basic sheet metal repair.
Maintenance Procedures:
Scheduled maintenance, oil changes, filter replacement, spark plug replacement, chain lubrication and adjustment, brake pad inspection, battery checks.
Troubleshooting Guides:
Diagnostic charts for common starting, running, and electrical issues.
Repair Procedures:
Step-by-step instructions for component overhaul, replacement, and adjustment.
Technical Specifications:
Torque values, clearances, fluid capacities, electrical specifications, engine build specifications.
Carburetor Overhaul And Adjustment:
Detailed procedures for cleaning, rebuilding, and tuning the stock carburetor, including jetting information.
Ignition Timing Adjustment:
Step-by-step guidance for setting ignition timing with points or electronic ignition systems.
Wheel Bearing Replacement:
Comprehensive instructions for removing, cleaning, greasing, and installing wheel bearings.
Depth Of Coverage:
Comprehensive, from basic maintenance to complete engine and transmission rebuilds, including diagnostics and component-level repair.
Engine Rebuild Scope:
Includes specifications for cylinder boring, piston ring installation, valve seat grinding, crankshaft and connecting rod bearing checks and replacement.
Electrical Diagram Detail:
Schematic diagrams illustrating all wiring circuits, component locations, and color codes.
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Engine Displacement Cu In:
74 cu in (1200cc)
Engine Displacement Cc:
1207
Bore X Stroke:
3.4375 in x 4.00 in (87.31 mm x 101.6 mm)
Compression Ratio:
Typically 8.0:1 (varies slightly by specific model/tune)
Horsepower Approx:
Approx. 50-60 HP (at crankshaft, varies by tuning)
Torque Approx:
Approx. 65-75 ft-lbs (at crankshaft, varies by tuning)
Carburetor Type:
Keihin Butterfly or Linkert (depending on specific build/original spec), S&S Super E/G often aftermarket upgrade.
Fuel Type:
Unleaded gasoline, minimum 87 octane recommended.
Ignition System Type:
Battery and Coil with points (standard) or electronic ignition module (optional/upgrade).
Oil Change Interval:
Typically every 2,000-3,000 miles or annually, whichever comes first. Refer to manual for precise interval.
Primary Chain Tension Check:
Check and adjust every 1,000-2,000 miles.
Spark Plug Replacement Interval:
Every 5,000-10,000 miles, or as needed.
Engine Oil Type Capacity:
API SF or SG classified, SAE 20W-50 (or as specified in manual). Capacity approx. 3 quarts (2.8 liters) with filter change.
Primary Chain Case Oil Type Capacity:
Harley-Davidson Primary Chaincase Lubricant (or equivalent), SAE 80W-90 gear oil. Capacity approx. 1 quart (0.95 liters).
Transmission Oil Type Capacity:
Harley-Davidson Transmission Lubricant (or equivalent), SAE 80W-90 gear oil. Capacity approx. 0.75 quarts (0.71 liters).
Brake Fluid Type:
DOT 4 recommended for hydraulic disc brakes.
Common Shovelhead Issues:
Oil leaks (crankcase seals, primary gasket), primary chain tensioner wear, carburetor tuning difficulties, electrical system aging, valve adjustments.
Fxs Low Rider Specific Issues:
Potential for fork seal leaks due to design, seat mounting wear, cable routing considerations.
Harley Davidson Legacy:
Long-standing manufacturer of iconic American motorcycles, known for V-twin engines and custom styling.
Shovelhead Introduction:
The Shovelhead engine was introduced in 1966, replacing the Panhead. The FXS Low Rider variant focused on a lower seat height and custom aesthetics.
Fxs Low Rider Development:
The FXS Low Rider was introduced in 1977 as a factory custom, distinguishing itself with lower handlebars, a lower seat, and forward-mounted footpegs for a relaxed riding position.
Shovelhead Production Years:
1966-1983 (final year for Shovelhead engines).
