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Coolster 3125XR8-S 125cc Kids ATV


 Semi-auto with Reverse, Air Cooled, Front Drum/Rear Disc Brakes. This model is not for sale in CA.

List Price:   $1599.00

Independence Day Sale Price:    $849.00

Or as low as with learn-more-img Learn More

Total Price:   $849.00


Free Today

√ Free  Free Shipping on Qualified Areas

√ Free  Free Pre-Delivery Inspection ($99 Value)

√ Free  Delivery Notification ($15 Value)

√ Free  MSO/MCO Registration Documents ($55 Value)

√ Free  3 Months Engine and Frame Warranty ($99 Value)

√ Free  Life Time Toll Free Technical Support(priceless)

√ Free  Liftgate Service($45 value)

√ Free  Residential Service Fee ($45 Value)


1. Based on the vehicles' nature and intended use, it is strongly recommended that assembly and PDI be performed by trained, licensed mechanics. 

2. All units, including those which have been fully assembled, are subject to unforeseen conditions during transit. All units must be inspected prior to initial operation in order to prevent unnecessary damage and ensure a good riding experience.

Due to excessive delivery rates to certain areas in the states of East Coast, HI, and AK, a freight charge may be required. Please call in for a quote.

Estimated Size Placement Chart

Displacement Height
110cc 3~4'
125cc 4'~5'
150cc~400cc 5' and up
This chart shows the absolute best size person to fit in this unit. However,this does not mean someone shorter or taller could not also ride this unit.

Top Features
  • Safety - Speed Restrictor (Governor)

    Safety - Speed Restrictor (Governor)

    It can be adjusted down to 5 mph, you can adapt the engine power as his or her skill develops.
  • Safety - Kill Switch

    Safety - Kill Switch

    With one press of the button it automatically cuts the engine so you can stop easily.
Engine Type Single Cylinder, 4-Stroke
Displacement 125cc
Bore and Stroke 2.06 inches x 2.24 inches
Ignition CDI
Maximum Speed 40 mph May vary depending on road condition, rider weight etc.
Battery 12V/5Ah
Starter Electric
Cooling Air Cooled
Drive Train
Transmission Semi-automatic with Reverse
Drive System Chain
Chassis / Suspension / Brakes
Front Suspension Double A-Arm
Rear Suspension non-Mono shock
Front Brake Drum
Rear Brake Disc
Front Tire 19 x 7-8
Rear Tire 19 x 7-8
Dimensions / Capacities
Length 57.6 inches
Width 36.2 inches
Height 36.4 inches
Wheelbase 33.7 inches
Seat Height 24.4 inches
Ground Clearance 5.5 inches
Net Weight 216 lbs
Gross Weight 260 lbs
Weight Capacity 143 lbs
Fuel Capacity 1 gal
Remote Control Yes
Speed Limiter Yes
Accessories Tool Kit, Owners Manual Book
Restrictions This model is not for sale in CA

Why Buy From MMM

At Mega Motor Madness we sell fun! All of our products are built with three main objectives in mind: To provide quality, innovate and affordable vehicles and accessories to motorsports enthusiasts all throughout the United States. We offer a diverse product line that includes ATVs, scooters, trikes, street bikes, UTVs and electric motorcycles. We pride ourselves with an excellent team, that is very knowledge about our products and available for all of your customer service needs and wants. You won't be disappointed!

  • Lowest Prices, Guaranteed

    Lowest Prices, Guaranteed!

    With over 100 different models to choose from, we at Mega Motor Madness are able to offer affordable motorsports products and accessories for the beginner to the most advanced riders. All of products come directly from our factory and we stand behind our prices 100%! If you find the same product somewhere else at a lower price, we will credit back the difference to you! No questions asked.
  • Fast Shipping

    Fast Shipping

    At Mega Motor Madness we sell fun! We also know you want your new new "toy" quickly! That is why we offer fast shipping to the lower 48 United States. Once payment is confirmed and received, you should be receiving your product anywhere between one and six business days depending on your location within the country. If you have any questions or would like us to track your package please call 1-855-623-6686. View More >>
  • Customer Service Is Our #1 Priority

    Customer Service Is Our #1 Priority

    No matter when you purchased a product from Mega Motor Madness, we will provide it with lifetime technical support. We aren't here just to sell you a great product, we are here to answer any and all questions you may have about it. Call our toll-free number at 1-855-623-6686 to speak with one of our professional techs to get all your questions answered and any problems you should have solved!
  • We Use Only The Finest Parts

    We Use Only The Finest Parts

    At Mega Motor Madness safety is our number concern when manufacturing all of our products. That is why all of our parts are made with the finest quality and inspected with highest standards. Before we ship any product to you, we inspect and go over it thouroughly from top to bottom. We also offer the option to ship your new motorsports product, fully assembled for your added convenience.
  • Our Website Is Safe and Trusted To Buy From

    Our Website Is Safe and Trusted To Buy From

    We know you are skeptical when putting your financial information over the world wide web. At Mega Motor Madness, finances and identity are extremely important to us as well. All purchases made from our website are made securely using Trustwave SSL Security ordering and an Authorize.Net payment gateway. We also offer Paypal as a payment option for your convenience.
Overall Customer Rating:


(1 Customer Reviews)

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  • Vivian Proctor


    May 28 , 2015

    Online chat solved my problems with the shipping policy.

Product Questions & Answers

How fast does it go and how many horsepower is it
Adam Salazar July 3,2015

Maximum Speed 43.5 mph
MegaMotorMadness July 6,2015        useful(1)

What does it mean semiautomatic? Is there gears that u have to shift thru while driving or is it just put in drive and go?
kyle December 18,2014

Need to shift gear by foot.
MegaMotorMadness December 19,2014        useful(1)

Who is the manufacturer of this model?
AJ September 30,2014

MegaMotorMadness October 1,2014        useful(1)

what is the ground clearance? who makes the engine? Is it a clone engine and of whom?
paul September 14,2014

Ground clearance is 5.5 inches. Coolster ATV, engine is made in China. We don't have detailed information.
MegaMotorMadness September 14,2014        useful(1)

How can you tell which atv is the size for you?
George July 16,2015


Speed Height
110cc 3~4'
125cc 4'~5'
150cc~400cc 5'+

MegaMotorMadness July 21,2015        useful(0)