Segment:
Cruiser Motorcycle
Target Audience:
Enthusiasts, owners, and independent repair shops seeking detailed technical information.
Competitors:
Other V-twin cruisers like Harley-Davidson Softail/Dyna models, Indian Chief models, Honda Shadow variants.
Vehicle Highlight:
Sport-cruiser styling with a powerful V-twin engine, emphasizing performance within the cruiser segment.
Engine:
Engine overhaul, disassembly, assembly, torque specifications, cylinder heads, pistons, crankshaft, lubrication system, cooling system.
Fuel System:
Fuel injection system, throttle body, fuel pump, injectors, fuel pressure regulator, fuel tank.
Ignition System:
Ignition coils, spark plugs, ECU, timing.
Transmission:
Gearbox assembly, clutch, shifting mechanism, transmission oil.
Drivetrain:
Belt drive system, final drive components, maintenance.
Brakes:
Front and rear brake systems, hydraulic lines, calipers, master cylinders, brake fluid specifications, bleeding procedures.
Suspension:
Front forks (telescopic), rear shock absorber, fork oil specifications, seal replacement, damping adjustments.
Electrical System:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), starter motor, lighting, instrumentation, fuses.
Chassis Frame:
Frame inspection, welds, steering head bearings, wheel alignment.
Bodywork Fittings:
Fairings, fenders, fuel tank removal/installation, seat, handlebars.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain/belt adjustment, brake pad inspection, tire pressure checks.
Troubleshooting:
Diagnostic procedures for common problems, fault codes, intermittent issues.
Repair:
Step-by-step repair instructions for all major components and systems.
Rebuilds:
Complete engine and transmission rebuild procedures.
Installation:
Procedures for installing aftermarket parts and accessories (where applicable).
Depth:
Comprehensive; covers basic maintenance to full engine/transmission rebuilds and advanced diagnostics.
Engine Type:
Air-cooled, four-stroke, V-twin, SOHC, 4 valves per cylinder
Displacement:
1670 cc (102 cubic inches)
Bore X Stroke:
97.0 mm x 113.0 mm
Horsepower:
Approx. 80-85 HP (at crankshaft, estimates vary)
Torque:
Approx. 105-110 lb-ft (at crankshaft, estimates vary)
Fuel Delivery:
Electronic Fuel Injection (EFI)
Throttle Body Size:
40 mm
Oil Type:
Yamalube 4 (or equivalent motorcycle specific API SG or higher, SAE 20W-40, JASO MA recommended)
Oil Capacity:
Approx. 4.0 US qt (3.8 L) with filter change
Cooling Method:
Air-cooled
Ignition Type:
TCIS (Transistor Controlled Ignition System)
Spark Plug Type:
NGK CR9E or DENSO U27FER-9
Emissions Compliance:
Meets EPA and CARB standards for applicable years.
Transmission Type:
5-speed constant mesh
Clutch Type:
Wet, multiple-disc, cable-actuated
Gear Ratios:
Specific ratios available in manual; designed for strong low-to-mid range torque.
Transmission Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4)
Transmission Oil Capacity:
Approx. 1.0 US qt (0.95 L)
Length:
Approx. 94.3 inches (2395 mm)
Width:
Approx. 35.6 inches (905 mm)
Height:
Approx. 46.5 inches (1180 mm)
Wheelbase:
Approx. 66.5 inches (1690 mm)
Ground Clearance:
Approx. 5.3 inches (135 mm)
Seat Height:
Approx. 29.1 inches (740 mm)
Dry Weight:
Approx. 635 lbs (288 kg)
Wet Weight:
Approx. 670 lbs (304 kg) (fully fueled)
Fuel Capacity:
Approx. 4.7 US gal (17.8 L)
Front Tire Size:
120/70ZR18M/C (59W)
Rear Tire Size:
190/50ZR17M/C (75W)
Front Wheel Type:
Cast aluminum
Rear Wheel Type:
Cast aluminum
Front Wheel Size:
18M/C x MT3.50
Rear Wheel Size:
17M/C x MT6.00
Safety Features:
Dual front disc brakes, single rear disc brake, powerful lighting, robust frame construction.
Braking System:
Hydraulic dual front discs with 4-piston calipers, hydraulic rear disc with 2-piston caliper.
Lighting:
Halogen headlight, LED taillight and brake light, turn signals.
Instrumentation:
Analog speedometer, tachometer, digital odometer, trip meter, fuel gauge, clock.
Oil Change Interval:
Every 3,000 miles (4,800 km) or 6 months, whichever comes first.
Air Filter Inspection:
Inspect every 3,000 miles (4,800 km), replace as needed.
Spark Plug Replacement:
Every 10,000 miles (16,000 km).
Brake Fluid Change:
Every 2 years or as per service manual recommendations.
Belt Drive Inspection:
Inspect tension and condition every 3,000 miles (4,800 km).
Fork Oil Type:
Yamaha Suspension Fluid 10W (or equivalent SAE 10W)
Fork Oil Capacity:
Approx. 495 cc per fork leg (check manual for exact specs).
Common Wear Items:
Clutch wear, belt drive wear, potential regulator/rectifier issues on earlier models, fork seal leaks.
Engine Performance Notes:
While generally robust, some owners report minor performance inconsistencies related to EFI tuning, which can be addressed with aftermarket tuning modules or ECU remapping.
Manufacturer:
Yamaha Motor Company, known for its extensive history in motorcycles, musical instruments, and marine products.
Model Introduction:
The Road Star Warrior was introduced in 2002 as a sportier, more aggressive variant of the established Road Star cruiser line, distinguishing itself with sportbike-inspired front-end styling, a lower profile, and performance-oriented chassis components.
Manufacturing Location:
Japan (assembly often in Japan or USA for North American market)
Production Years Covered:
2002-2007 (Manual covers 2002-2006 models)
