2021 Mongoose 90s Black

Mongoose 90S

$2,549 MSRP*

Offroad Performance

Designed for the youth rider.  The ergonomic seat provides riders with the ease to move and shift around on the vehicle or get a better grip.


2021 Mongoose 90S


Preload adjustable shocks

1 of 5

Large rear disc break

2 of 5

The Mongoose 90s has reverse gear

3 of 5

Electric start with a backup kickstart 

4 of 5

1 Year Limited Factory Warranty

5 of 5

The 2021 Mongoose 90S is a Class Leading Fully Automatic Youth ATV with Reverse and the following features:

  • Y-10 compliant for ages 10 and up
  • 90cc SOHC 4-stroke, 2-valve single cylinder engine, fan cooled
  • Forward, neutral and reverse transmission
  • CVT transmission for automatic shifting from low to high speeds
  • Front drum and rear disc brakes with parking brake lock
  • Single front A-Arms with preload adjustable shocks
  • Rear swing arm suspension with adjustable rear shock
  • Sport style matte black steel wheels
  • Front headlight with low and high beam
  • Single rear tail light
  • Rear grab bar
  • Tether cord with safety cut off switch
  • Mounting tab for safety flag
  • Ergonomic seat

Instrumentation: Gear position indicator

ATV Safety Training Offered with the Purchase of any Kymco Youth ATV

The 2021 Mongoose 90S is available in Yellow & Black

*Specifications and pricing are subject to change*

*Dealer sets the actual destination charge, your price may vary*

*Note: MSRP does not reflect destination or other dealer vehicle preparation charges. KYMCO USA makes every effort to present the most current specifications and model features. Equipment, colors, availability and specifications may change without notice or obligation. Some models are shown with optional equipment.

Colors | Yellow, Black
Headlights | Single
Wheel Colors | Matte Black
Auto Stop Safety Lanyard | Rear Grab Bar
Age | Y-10 Compliant
Engine Type | SOHC 4-Stroke
Displacement | 90cc
Bore x Stroke | 47×51.8mm
Claimed Horsepower | 6.4hp
Claimed Torque | 4.85ft/lb @5500rpm
Fuel Management System | Carburetor
Cooling | Fan Cooling
Ignition | Electric/Kick
Transmission | CVT Automatic
Front Brakes | Drum
Rear Brakes | Hydraulic Disc
Front Suspension | Single A-Arm/2.8″
Rear Suspension | Single A-Arm/2.9″
Tires-Front | 18×7-8
Tires-Rear | 18×9-8
Shocks | Oil Dampened Preload Adjustable
Length | 57.5″
Width | 35.4″
Height | 36.2″
Wheelbase| 37″
Ground Clearance | 5.9″
Claimed Dry Weight | 264.6 lbs
Fuel Capacity | 1.4gal


  • 1 Year Limited Factory Warranty

EPA Compliant | Red Sticker

Download Brochure