Model:
Mongoose / KXR 90 50
Model Variant:
Mongoose 90, KXR 90, Mongoose 50, KXR 50
Chassis Code Prefix:
KYMCO chassis codes typically begin with 'KY'
Engine Code Prefix:
Engine codes vary by specific model year and engine displacement, often indicated by a prefix followed by displacement and other identifiers.
Segment:
Youth ATV / Entry-Level ATV
Target Demographic:
Young riders, beginner ATV enthusiasts, recreational users
Competitors:
Competes with similar sized ATVs from brands like Polaris (Outlaw 50/90), Honda (TRX90), Suzuki (LT-Z50/90), Yamaha (Raptor 50/90), Arctic Cat (Alterra 50/90).
Features:
Compact size, beginner-friendly handling, automatic transmission, robust build for recreational use, safety features like speed limiter capabilities.
For Owners:
Provides essential knowledge for maintaining and repairing these ATVs, reducing reliance on expensive professional services and extending vehicle lifespan.
For Technicians:
Offers official factory data, ensuring accuracy and completeness for professional diagnostic and repair tasks.
Coverage Type:
Complete Official Factory Service / Repair / Full Workshop Manual
Target Audience:
Professional Technicians, DIY Enthusiasts
Total Pages:
Estimated to be comprehensive across 18 PDF files, likely exceeding 500 pages when combined.
Type:
Service Manual, Repair Manual, Workshop Manual
Delivery Format:
ZIP Archive containing 18 PDF Files
Interactivity:
Keyword Searchable
Powertrain:
Engine (4-stroke, air-cooled, specific displacement for 50cc and 90cc variants), Fuel System (carburetor or EFI depending on year/model), Ignition System, Exhaust System, Cooling System (air-cooled)
Drivetrain:
Automatic Transmission (CVT - Continuously Variable Transmission), Drive System (Chain drive or Belt drive depending on specific model and year)
Chassis Suspension:
Frame, Front Suspension (Telescopic Forks), Rear Suspension (Swingarm with Monoshock or Dual Shocks), Steering System
Braking System:
Front Brake (Drum or Disc), Rear Brake (Drum or Disc), Brake System Hydraulics
Electrical System:
Battery, Charging System (Stator, Regulator/Rectifier), Lighting System (Headlight, Taillight, Indicators), Starting System (Electric Start, Kick Start if applicable), Wiring Diagrams, Fuses, Relays
Body And Trim:
Body Panels, Seat, Handlebars, Footrests, Fenders, Plastics
Maintenance:
Routine Checks, Lubrication, Filter Replacement (Air, Oil), Spark Plug Service, Chain/Belt Adjustment and Lubrication, Brake Adjustment and Inspection, Tire Pressure Checks
Troubleshooting:
Diagnostic Procedures, Common Problems and Solutions, Symptom-based Troubleshooting Guides
Repair Rebuild:
Engine Overhaul and Reassembly, Transmission Service, Suspension Component Replacement, Brake Caliper/Master Cylinder Rebuild, Electrical Component Diagnosis and Replacement
Technical Data:
Torque Specifications, Clearances, Fluid Capacities, Electrical Specifications
Depth:
Comprehensive, covering from basic maintenance to full engine and component rebuilds, including detailed diagnostic procedures and specifications.
Engine Type:
4-stroke, air-cooled, single-cylinder
Displacement 50Cc:
Approximately 49.4cc (for 50cc models)
Displacement 90Cc:
Approximately 89.6cc (for 90cc models)
Horsepower Approx 50Cc:
Typically in the range of 3-5 HP (varies by specific model year and tuning)
Horsepower Approx 90Cc:
Typically in the range of 6-8 HP (varies by specific model year and tuning)
Torque Approx:
Specific torque figures vary but are commensurate with small displacement engines.
Fuel Delivery:
Carbureted (e.g., Keihin or similar) for most models, some later or higher-spec versions may feature EFI.
Fuel Type:
Unleaded Gasoline (Octane rating as per manual recommendations)
Oil Type:
Likely SAE 10W-40 or 20W-50, 4-stroke motorcycle/ATV specific oil meeting JASO MA or MA2 standards. (Refer to manual for exact specification)
Oil Capacity Approx:
Approximately 0.8 - 1.0 Liters (Refer to manual for exact capacity and procedure)
Transmission Type:
Automatic Continuously Variable Transmission (CVT) with Forward, Neutral, Reverse gears.
Gear Ratios:
CVT ratios are variable. Manual will detail the drive and driven pulley characteristics and belt specifications.
Drive Type:
Chain Drive or Belt Drive (depending on specific model and year configuration).
Transmission Fluid:
Typically uses standard API SG or higher transmission oil. (Refer to manual for exact specifications and capacity)
Length Approx:
Varies slightly by model but generally compact, around 1500-1600 mm.
Width Approx:
Varies slightly by model but generally around 900-1000 mm.
Height Approx:
Varies slightly by model but generally around 950-1050 mm.
Dry Weight Approx:
Typically around 100-120 kg for the 90cc models, less for 50cc.
Payload Capacity Approx:
Designed for single rider, with modest rack capacity if equipped. (Refer to manual for specific load ratings).
Wheelbase:
Typically around 1000-1100 mm.
Consumer Ratings:
Often rated for specific age groups (e.g., 12+ years) based on engine size and performance. Specific safety ratings from independent bodies may be limited for this class.
Speed Limiter:
Many youth ATVs feature adjustable speed limiters (e.g., throttle stop screw, governor settings) to control maximum speed for younger riders. The manual will detail how to adjust these.
Brakes:
Disc or drum brakes providing adequate stopping power. Manual details inspection and adjustment procedures.
Rollover Protection:
Standard ATV design inherently requires responsible operation. Manual emphasizes safe riding practices.
Lighting:
Headlight, taillight, and brake light for visibility. Manual covers bulb replacement and electrical checks.
Oil Change Interval:
Typically every 1000-2000 km or annually, whichever comes first. (Refer to manual for specific interval and conditions)
Air Filter Cleaning Replacement:
Regular inspection and cleaning (every few hundred km or as needed based on operating conditions), replacement as per manual recommendations.
Spark Plug Service:
Inspection and cleaning/gap adjustment every 1000-2000 km, replacement as per manual recommendations.
Valve Clearance Adjustment:
Periodically, typically every 2000-4000 km. (Crucial for engine performance and longevity, detailed in the manual)
Brake Fluid:
DOT 3 or DOT 4 brake fluid (Ensure compatibility based on manual's specification).
Coolant Type:
Air-cooled engine, no coolant required.
Chassis Lubrication:
Grease points for suspension, steering, and swingarm pivots. Manual will specify grease type and lubrication intervals.
Common Wear Items:
CVT belt wear, carburetor adjustments for altitude/age, suspension bushings, brake pad/shoe wear.
Electrical Concerns Potential:
Battery health, charging system output, connections corrosion (especially in humid environments).
Kymco Overview:
KYMCO (Kwang Yang Motor Co., Ltd.) is a Taiwanese manufacturer known for producing a wide range of scooters, motorcycles, ATVs, and utility vehicles. They are a significant global player in the powersports industry.
Mongoose Kxr Lineage:
The Mongoose and KXR lines represent KYMCO's offering in the youth and entry-level ATV segment. These models have seen gradual updates in styling, engine technology, and safety features over their production years. The 90cc engine is a common upgrade from 50cc models for slightly older or more experienced young riders.
Production Period Estimated:
These models have been in production for many years, with the 90cc versions likely introduced to cater to a slightly older demographic than pure 50cc models. Specific model years covered by the manual are crucial for exact specification matching.
