the 2018 mongoose 90S is a class leading fully automatic youth atv with reverse and the following FEATURES:


  • Electric Start
  • Backup Kickstart
  • Single Headlight
  • Matte Black Sport Styled Wheels
  • Auto Stop Safety Lanyard
  • Rear Grab Bar
  • One Year Limited Factory Warranty (Extended Warranty Packages Available)
  • Y-10 Compliant



  • Orange
  • Black


The ATV Safety Institute's Golden Rules:

  • Always wear a DOT-compliant helmet, goggles, long sleeves, long pants, over-the-ankle boots, and gloves.
  • Never ride on paved roads except to cross when done safely and permitted by law - another vehicle could hit you. ATVs are designed to be operated off-highway.
  • Never ride under the influence of alcohol or drugs.
  • Never carry a passenger on a single-rider ATV, and no more than one passenger on an ATV specifically designed for two people.
  • ANSI/SVIA Rated Y10 - The 2018 Mongoose 90 is recommended for riders 10 years of age and older.
  • Mongoose 90R riders younger than 16 years of age must be supervised by an adult. KYMCO recommends that all ATV riders take a training course and read their owner's manual thoroughly.
  • See Vehicle Warning Labels for Specific Age Category Requirements. (Please check age requirements on previous year models, as they have changed.)
  • Ride only on designated trails and at a safe speed.
Engine Type SOHC 4-Stroke
Displacement 89cc
Bore x Stroke 47x51.8
Cooling Fan Cooling
Ignition Electric/kick
Claimed Horsepower 6.3hp
Claimed Torque 4.87ft/lb @5500rpm
Fuel Managment System Carburetor
Drive Train / Brakes
Transmission CVT Automatic F-N-R
Front Brake Drum
Rear Brake Hydraulic Disc
Chassis / Suspension
Front Suspension Single A-Arm
Rear Suspension Swing Arm
Tires Front 18x7-8
Tires Rear 18x9-8
Claimed Dry Weight 232 lbs
Shocks Oil Dampened Preload Adjustable
Dimensions / Weight
Length 57"
Width 36"
Height 37"
Wheelbase 37.9''
Rake/Trail 13.2"
Fuel Capacity 1.4 gal
Wheel Colors Matte Black
Auto Stop Safety Lanyard Rear Grab Bar
Warranty / More
Colors Black and Orange
Warranty One Year Limited Factory Warranty
Headlight Single
EPA/C.A.R.B. Compliant: Yes/RED STICKER
Age Y-10 Compliant

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2018 Mongoose 90S

  • Brand: KYMCO
  • Product Code: Mongoose 90S
  • Availability: In Stock
  • $2,995.00