Segment:
Cruiser/Sportbike hybrid motorcycle
Target Audience:
Enthusiasts seeking a blend of classic Harley-Davidson style with sportier handling and performance
Competitors:
Other mid-weight cruisers and roadsters from brands like Triumph, Indian, and some Japanese manufacturers.
Design Philosophy:
Sportier iteration of the iconic Sportster platform, emphasizing handling and performance over pure cruiser comfort.
Usp:
Dual front disc brakes, inverted front forks, sporty ergonomics
Engine:
Complete overhaul, troubleshooting, diagnostics
Transmission:
Removal, installation, internal repairs, clutch service
Fuel System:
Carburetor (Keihin CV) service, fuel pump, fuel lines
Electrical System:
Wiring diagrams, ignition, starting, charging, lighting, diagnostics
Suspension:
Front fork (49mm USD) overhaul, rear shock absorbers, adjustments
Brakes:
Front and rear brake caliper service, master cylinders, bleeding, pad replacement
Chassis And Frame:
Frame inspection, steering head bearing service, wheel bearing replacement
Bodywork:
Fender removal/installation, tank service, seat removal, minor body repairs
Estimated Pages:
~400-600
Type:
Service Repair Manual
Powertrain:
Engine, transmission, final drive (belt)
Running Gear:
Suspension, brakes, wheels, tires, steering
Electrical:
Ignition, charging, starting, lighting, instrumentation, accessories
Chassis:
Frame, body panels, seat, fuel tank, exhaust system
Maintenance:
Oil changes, filter replacements, spark plug service, chain/belt adjustment, brake fluid flush, fork oil changes
Troubleshooting:
Diagnostic procedures for common performance and electrical issues, fault codes
Repair:
Engine internal component replacement, transmission rebuild, brake system overhauls, suspension fork rebuilds, electrical component repair
Diagnostics:
Step-by-step diagnostic flowcharts, testing procedures for electrical components and sensors
Level:
Comprehensive: From routine maintenance to complete engine and transmission rebuilds
Type:
Air-cooled, Evolution V-twin
Displacement:
1200cc (73.3 cubic inches)
Bore X Stroke:
3.50 in x 3.81 in (88.9 mm x 96.8 mm)
Valvetrain:
OHV, 2 valves per cylinder
Ignition System:
Electronic, Spark Ignition
Horsepower:
~65-70 hp (estimated, at crankshaft)
Torque:
~70-75 lb-ft (estimated, at crankshaft)
Type:
Mikuni HSR42 Carburetor (Keihin CV40 on earlier models, but 2007 is typically Mikuni for Roadster)
Fuel Type:
Unleaded gasoline, minimum 91 octane (R+M)/2
Primary Drive:
Constant mesh, helical gears, chain drive to clutch
Clutch:
Clutch type: Wet, multi-plate, diaphragm spring
Gear Ratios:
1st: 10.373, 2nd: 7.245, 3rd: 5.040, 4th: 3.906, 5th: 3.105
Transmission Oil Type:
Harley-Davidson recommends Harley-Davidson Transmission Lubricant or SAE 80W-90 hypoid gear oil
Crash Test Data:
Not applicable (motorcycle)
Braking System:
Dual front hydraulic disc brakes, single rear hydraulic disc brake
Lighting:
Halogen headlight, LED tail light and brake light
Frame Construction:
Steel frame and swingarm
Ergonomics:
Forward-mounted foot controls, raised handlebars for a sportier rider triangle
Oil Change:
Every 5,000 miles or 6 months, whichever comes first
Primary Chain Tension Check:
Every 10,000 miles
Belt Tension Check:
Every 10,000 miles
Spark Plug Replacement:
Every 10,000 miles
Brake Fluid Flush:
Every 2 years
Fork Oil Change:
Every 20,000 miles or as needed
Engine Oil Capacity:
3.0 US quarts (2.8 liters) with filter change
Engine Oil Type:
Harley-Davidson 20W-50 Syn3 or equivalent motorcycle-specific 20W-50 V-twin oil
Primary Chain Case Oil Capacity:
1 US quart (0.95 liters)
Primary Chain Case Oil Type:
Harley-Davidson Primary Chain Case Lubricant or SAE 85W-140
Common Problems:
Carburetor tuning issues, potential starter clutch wear, exhaust header leaks, charging system issues on high-mileage units.
Maintenance Tips:
Regularly check and adjust primary chain tension. Ensure proper torque on exhaust header clamps. Keep electrical connections clean and sealed.
Foundation:
Founded in 1903, Harley-Davidson is one of America's oldest motorcycle manufacturers, known for its V-twin engines and cruiser motorcycles.
Sportster Lineage:
The Sportster line, introduced in 1957, has evolved from a lightweight performance bike to a versatile platform. The Roadster variant, reintroduced in recent years, emphasizes sportier handling and braking.
Manufacturing Location:
United States (Milwaukee, Wisconsin)
Model Year Specifics:
The 2007 model year saw continued refinement of the Evolution engine and chassis, with the Roadster offering a distinct performance-oriented package.
