Have Questions?

Talk to an Expert

Our U.S.-based team can help you choose the right gear, configure the perfect setup, or put together a custom quote for your project.

Payment & Security

  • Ach Direct Debit
  • Amazon
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Estimated Delivery
Free shipping on every U.S. order

Type your ZIP code to see when your gear arrives at your door.

Please enter a valid 5-digit ZIP code.
Estimated Shipping Time

We offer free shipping on all orders across the contiguous United States. Orders are typically processed within 1–3 business days, and standard delivery takes 5–10 business days. Freight and oversized items take 10–21 business days and may require a scheduled delivery.

What Is Your Return Policy?

We offer a 30-day return window on eligible items from the date of delivery. Products must be unused, in original condition, and returned in their original packaging. To start a return, contact us at support@adventuremotion.com or call (877) 834-4299. Return shipping costs may apply for non-defective items. Damaged or defective items are replaced at no cost to you.

Frequently Asked Questions

Do you offer financing?

Yes — we partner with Affirm so you can split your purchase into easy monthly payments with 0% APR options. Just select Affirm at checkout.

Are you an authorized dealer?

Yes. Adventure Motion is an authorized online dealer for all brands we carry. That means your manufacturer warranty is fully valid and protected.

Can you help me choose the right product?

Absolutely. Call us at (877) 834-4299 or email support@adventuremotion.com — our team specializes in outdoor gear and can match you to the right product.

What if my item arrives damaged?

Contact us within 48 hours of delivery at support@adventuremotion.com. We'll arrange a replacement at zero cost to you — no questions asked.

Need items in bulk? Contact us for a custom quote or invoice.
Save an additional 3% off your order when paying via ACH or Wire transfer.

Save $120 Today

UP TO
15% OFF

Get up to 15% off sitewide. Or save an additional $120 off any order over $3,000 — use code AM120 at checkout.

AM120

The MotoTec Mud Monster is a single-seat off-road go kart aimed at younger drivers who have outgrown battery-powered ride-ons. A 98cc four-stroke OHV engine rated at 2.5 HP turns the rear wheels through a centrifugal clutch and chain, so there is nothing to shift: press the pedal and the kart pulls away. The engine carries both EPA and CARB approval, which clears it for California as well as the rest of the country.

Every corner rides on hydraulic damping, with two shocks at the front and a single unit at the rear, all mounted to a tubular steel frame. Positraction feeds drive to both rear wheels so the kart keeps pulling on loose dirt, and a foot-operated hydraulic rear disc brake handles stopping. Pneumatic 14-inch tires, wider at the rear than the front, keep the kart planted without beating up the driver on broken ground.

Safety equipment is built in rather than optional. A roll bar wraps the seating area, a seat belt holds the driver in place, and a kill switch cuts the engine instantly. The seat adjusts to suit a growing driver, and MotoTec allows up to 63 inches of rider height with a 47-inch minimum, a 150 lb weight limit and a recommended age of 13 and up. Metal throttle and brake pedals replace the plastic parts used on lighter karts.

Ride Safe

  • A helmet and full safety gear should be worn on every run
  • Adult supervision is required whenever the kart is in use
  • The kill switch stops the engine immediately if the driver needs it
  • Fasten the seat belt and set the seat to the driver's reach before starting

⚠️ OFF-ROAD USE ONLY — NOT STREET LEGAL

This vehicle is designed exclusively for recreational off-road riding and is not street legal. It is intended for use on private property, dirt trails, motocross tracks, and designated off-road riding areas only. This product is NOT classified as a transportation vehicle and may not be operated on public roads, highways, sidewalks, bike lanes, or any public-access roadway. This product does not include a VIN, title, or registration and is sold strictly as recreational off-road sporting equipment. Always wear a DOT-approved helmet and appropriate protective gear. Off-road vehicle laws vary by state — riders are responsible for reviewing and complying with all applicable local regulations.

Engine & Drivetrain

  • Engine: 98cc 4-stroke OHV, EPA and CARB approved
  • Power: 2.5 HP
  • Bore / Stroke: 56mm / 40mm
  • Compression Ratio: 8.5:1
  • Spark Plug: F6TC
  • Transmission: Automatic, centrifugal clutch, chain drive
  • Starting: Easy pull start

Performance

  • Top Speed: 25 mph (varies with rider weight)
  • Minimum Turning Diameter: 6 m or less at 22 km/h

Chassis & Brakes

  • Frame: Tubular steel
  • Suspension: Dual front hydraulic shocks, single rear hydraulic shock
  • Brake: Foot-operated hydraulic rear disc
  • Front Wheels: 14x4.10-6 pneumatic
  • Rear Wheels: 14x5-6 pneumatic
  • Safety Equipment: Seat belt, roll bar, adjustable seat, kill switch

Size & Fit

  • Recommended Age: 13 and up
  • Max Rider Weight: 150 lbs
  • Rider Height: Up to 63 inches, 47 inch minimum

Dimensions & Weight

  • Kart Size: 58 x 33 x 43 inches
  • Wheelbase: 36 inches
  • Ground Clearance: 5 inches
  • Kart Weight: 155 lbs
  • Packaged Size: 54 x 33 x 21 inches
  • Packaged Weight: 198 lbs

  • 98cc four-stroke OHV engine approved by both the EPA and CARB
  • Full hydraulic suspension front and rear smooths out rough ground
  • Positraction drives both rear wheels for traction in dirt and mud
  • Roll bar, seat belt and kill switch fitted as standard
  • Adjustable seat and extra legroom to fit a growing driver
  • Metal throttle and brake pedals instead of plastic
  • Foot-operated hydraulic rear disc brake
  • Pull start with an automatic clutch, so there are no gears to manage

MotoTec covers this unit with a 60-day parts-replacement warranty from the date of delivery against defects in materials and workmanship. Contact Adventure Motion support with your order number and photos of the issue to start a claim.

Normal wear items such as tires, tubes, brake pads, chains and batteries are not covered, and neither is damage from racing, jumping, collisions, improper assembly, modification, or riding beyond the rated limits.

How fast does the mud monster go?
Top speed is listed at 25 mph, though what a kart actually reaches depends on driver weight and the surface it is on.
What age is it recommended for?
Mototec recommends drivers 13 and up, with a 150 lb maximum rider weight and a height range of 47 to 63 inches.
Is it street legal?
No. it is an off-road recreational kart and is not approved for public roads.
Does the driver have to shift gears?
No. an automatic centrifugal clutch and chain drive do the work, leaving only a throttle pedal and a brake pedal.
What fuel does it take?
The 98cc engine is a four-stroke, so it runs on straight unleaded gasoline with the oil held in the crankcase rather than mixed into the fuel.
Can it be used in california?
Yes. the engine carries carb approval alongside its epa approval.

Customers also bought