Vehicle Segment:
Performance Trail/Mountain Snowmobile
Competitors 1999:
Ski-Doo MXZ series, Arctic Cat ZRT series, Polaris XC series
Performance Focus:
Engineered for aggressive trail riding and moderate mountain capability.
Engine Platform:
Renowned for its potent twin-cylinder, liquid-cooled engine.
Engine Management:
Complete engine overhaul, tuning, carburetor adjustment, ignition system diagnostics
Fuel System:
Fuel pump, fuel lines, fuel tank, carburetor disassembly and cleaning
Cooling System:
Radiator, coolant hoses, thermostat, water pump inspection and service
Exhaust System:
Exhaust pipe, muffler inspection and replacement
Drivetrain:
Clutch assembly, chaincase, drive chain inspection and adjustment, primary and secondary clutch service
Suspension System:
Front suspension (telescopic forks), rear suspension (articulated track suspension, shock absorbers, springs), linkage inspection and maintenance
Steering System:
Handlebar, steering post, tie rods, ski assembly lubrication and inspection
Braking System:
Hydraulic disc brake system, brake caliper, master cylinder, brake lines, brake fluid replacement
Electrical System:
Lighting, ignition, battery, starter motor, stator, CDI unit, wiring diagrams, troubleshooting
Bodywork And Chassis:
Body panel removal and installation, seat, windshield, track removal and installation
Scheduled Maintenance:
Regular servicing, lubrication points, inspections
Troubleshooting Diagnostics:
Systematic fault finding, symptom-based troubleshooting guides
Disassembly Assembly:
Complete component removal, disassembly, cleaning, inspection, and reassembly instructions
Rebuilding Overhaul:
Detailed steps for complete engine rebuild, transmission overhaul, suspension rebuild
Adjustments Tuning:
Carburetor jetting, ignition timing, clutch engagement, suspension settings
Inspections:
Component wear checks, torque specifications, operational checks
Depth Of Coverage:
Comprehensive: From basic maintenance to complete engine and component rebuilds.
Diagrams Illustrations:
Exploded views for disassembly/assembly, circuit diagrams, detailed component illustrations
Special Tools:
Identification and usage of specific Yamaha tools required for certain procedures
Engine Type:
Liquid-cooled, 2-stroke, reed valve
Engine Configuration:
Parallel Twin
Bore X Stroke:
73.0 mm x 73.0 mm
Horsepower Estimated:
100-110 HP (varies by tuning and specific configuration)
Torque Estimated:
N/A (Specific data often not provided in generalized specs, but known for strong mid-range)
Carburetor Configuration:
Dual Mikuni VM34SS
Fuel Type Recommended:
Unleaded gasoline (87-91 octane recommended)
Oil Injection:
Yamalube 2-stroke oil
Crash Testing:
Snowmobiles are not typically rated by organizations like NHTSA. Safety relies on design and operator skill.
Braking System Type:
Hydraulic disc, forward-mounted caliper
Lighting System:
Halogen headlights, taillight, brake light
Throttle Safety:
Thumb throttle with lockout
Kill Switch:
Handlebar-mounted emergency shut-off
Windshield:
Provides wind protection for the operator
Initial Break In:
Specific break-in procedure detailed in owner's manual (typically 2-5 hours of varied RPM)
Chaincase Oil Change:
Every 100-200 hours or annually
Spark Plug Replacement:
Every 50-100 hours or annually, depending on usage
Clutch Inspection:
Annually or every 50 hours for wear and proper operation
Engine Oil Type:
Yamaha Premium 2-Stroke Synthetic Blend Oil (Yamalube 2W recommended)
Chaincase Oil Viscosity:
Yamaha Friction Control Gear Oil or equivalent (e.g., 80W-90 GL-4)
Coolant Type:
Ethylene glycol-based antifreeze mixture (50/50 with distilled water)
Brake Fluid Type:
DOT 3 or DOT 4 Hydraulic Brake Fluid
Carburetor Icing:
Common in cold, humid conditions; manual provides cleaning and jetting advice.
Clutch Alignment:
Improper alignment can lead to premature belt wear and poor performance.
Exhaust Gasket Leaks:
Can occur with age; manual details proper gasket replacement and torque.
Yamaha Motorsports:
Yamaha has a long-standing reputation for performance and reliability in motorsports, including snowmobiles, motorcycles, and ATVs.
Srx Lineage:
The SRX line was Yamaha's flagship performance snowmobile, known for its powerful twin-cylinder engines and handling capabilities.
1999 Updates:
While specific major overhauls for 1999 are less documented than later generations, continuous refinement in suspension, clutching, and engine tuning were typical.
Production Era:
Late 1990s to early 2000s
