Comprehensive: Covers everything from basic maintenance to full engine and transmission rebuilds. Includes detailed diagrams, exploded views, and diagnostic procedures.
📊 Manual Specifications
File Format
File Type:
PDF
Searchability:
Searchable text content (OCR processed for scanned documents)
Printability:
Printable pages
Print Quality
Image Resolution:
High-resolution diagrams and images
Binding Type
Binding:
N/A (Digital Download)
Paper Type
Paper Quality:
N/A (Digital Download)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Four-stroke, SOHC, 5-valve, liquid-cooled
Displacement:
660 cc
Bore X Stroke:
100.0 mm x 83.9 mm
Compression Ratio:
9.2:1
Starting System:
Electric Start
Performance
Horsepower Estimate:
Approximately 50-55 hp (factory figures often understated)
Torque Estimate:
Approximately 45-50 lb-ft
Fuel System
Carburetor:
Mikuni BSR42, single, flat-slide
Fuel Type:
Unleaded gasoline, minimum 87 octane
Lubrication
Oil Type:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Oil Capacity With Filter Change:
2.40 L (2.5 US qt)
Oil Capacity Without Filter Change:
2.10 L (2.2 US qt)
Cooling System
Coolant Type:
Permanent antifreeze, mixture of 50% ethylene glycol and 50% deionized water
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Fluid Capacity:
0.90 L (0.95 US qt)
📐 Dimensions
Exterior
Length:
1,845 mm (72.6 in)
Width:
1,165 mm (45.9 in)
Height:
1,120 mm (44.1 in)
Wheelbase:
1,280 mm (50.4 in)
Ground Clearance:
250 mm (9.8 in)
Weights
Dry Weight:
210 kg (463 lbs)
Curb Weight:
Not specified, typically ~225 kg (496 lbs) with fluids
Fuel Tank Capacity:
10.0 L (2.6 US gal)
🛡️ Safety Features
Ratings
Crash Test Information:
Not applicable for ATVs as per automotive standards.
Active Features
Brakes:
Front: Dual hydraulic disc. Rear: Single hydraulic disc.
Parking Brake:
Mechanical disc brake (rear caliper lever lock)
Passive Features
Handlebars:
Wide handlebars for control and leverage.
Footpegs:
Aggressive, serrated footpegs for grip.
💡 Technology Features
Infotainment
Infotainment System:
N/A (Basic instrumentation only)
Driver Assistance
Driver Assistance Features:
N/A
Connectivity
Connectivity Features:
N/A
Instrumentation
Instrument Panel:
Digital speedometer, odometer, trip meter, neutral indicator, reverse indicator, oil warning light, coolant temperature warning light, neutral indicator.
🔧 Maintenance
Service Intervals
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months (whichever comes first), or more frequently for hard use.
Air Filter Cleaning:
Every 100 km (60 miles) or monthly; replace as needed.
Spark Plug Replacement:
Every 3,000 km (1,800 miles) or 12 months.
Valve Clearance Check:
Every 3,000 km (1,800 miles) or 12 months.
Chain Lubrication And Adjustment:
Every 500 km (300 miles) or monthly; inspect more frequently.
Fluid Specifications
Engine Oil Specification:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Transmission Oil Specification:
Yamalube 4 (or equivalent) SAE 10W-40 API SG or higher, JASO MA certified.
Coolant Specification:
50% ethylene glycol and 50% deionized water.
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid.
Known Issues
Common Wear Items:
Clutch plates, wheel bearings, tie rod ends, swingarm bushings, front suspension bushings, brake pads.
Carburetor Tuning:
Can require periodic adjustments due to altitude or temperature changes, and jetting may need modification for aftermarket exhaust systems.
Engine Performance Tips:
Regular cleaning of the carburetor and air filter, and proper valve adjustments are critical for maintaining the 660cc engine's robust performance.
📚 Vehicle History
Brand Heritage
Yamaha Atv Legacy:
Yamaha has a long-standing reputation for producing durable and high-performance off-road vehicles, including its pioneering line of ATVs.
Model Evolution
Yfm660R Lineage:
The YFM660R (Raptor 660R) was a significant model in Yamaha's sport ATV lineup, bridging the gap before the introduction of the fuel-injected YFZ450 and later the Raptor 700.
Production Years:
Approximately 2001-2005
Production
Manufacturing Location:
Japan (likely)
🏆 Awards & Recognition
Recognitions
Historical Acclaim:
The Raptor line is widely recognized for its sport-riding capabilities and helped define the performance ATV category during its era.
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