1. Introduction
This manual provides essential information for the safe assembly, operation, and maintenance of your INJUSA Go Kart Mercedes (Model 4122). Please read all instructions carefully before use and retain this manual for future reference.
Safety Warnings:
- Not recommended for children under 2 years of age. Always use under direct adult supervision.
- Ensure all parts are securely fastened before each use. Regularly check for loose components.
- Do not use on public roads, near motor vehicles, or on steep inclines.
- Wear appropriate safety gear, including a helmet, knee pads, and elbow pads.
- Keep hands and feet away from moving parts during operation.
2. Package Contents
Before assembly, carefully unpack all components and verify that the following items are present:
- Go Kart Body
- Wheels (4)
- Steering Wheel
- Adjustable Seat
- Pedals
- Brake Lever
- Assembly Hardware (screws, nuts, washers)
- Instruction Manual
If any parts are missing or damaged, please contact INJUSA customer support immediately before proceeding with assembly.
3. Assembly Instructions
Follow these step-by-step instructions for assembling your Go Kart. A Phillips head screwdriver and a wrench may be required (not included).
Step 1: Attach the Front Axle and Wheels
Secure the front axle to the main body of the go-kart using the provided hardware. Attach the front wheels to the axle, ensuring they spin freely and are securely fastened with the appropriate washers and caps.

Image: Front view of the Go Kart, highlighting the front wheel assembly.
Step 2: Install the Steering Wheel
Connect the steering column to the front axle mechanism. Attach the steering wheel to the top of the column, ensuring it is firmly in place and allows for smooth turning of the front wheels. Test the steering mechanism for full range of motion.
Step 3: Mount the Rear Axle and Wheels
Attach the rear axle to the go-kart body. Install the rear wheels, making sure the pedal mechanism engages correctly with the drive wheel. Secure the wheels with the provided fasteners.

Image: Side view of the Go Kart, illustrating the pedal and wheel arrangement.
Step 4: Secure the Seat
Position the adjustable seat on the go-kart body. Secure it using the designated fasteners. The seat can be adjusted forward or backward to suit the child's leg length. Ensure it is locked into position before use.

Image: Detail of the adjustable seat mechanism.
Step 5: Attach Pedals and Brake
Ensure the pedals are correctly attached to the crank arms. Connect the brake lever to the braking mechanism, typically located near the rear wheel. Test the brake for proper function and responsiveness.
Step 6: Final Inspection and Decals
Perform a final check of all connections to ensure they are tight and secure. Test the steering, pedals, and brake. Apply any decorative decals as desired, referring to the product packaging for placement.

Image: A child demonstrating the assembled Go Kart.
4. Operating Instructions
Riding the Go Kart:
- The go-kart is pedal-powered. The child should sit comfortably in the adjustable seat with both feet placed firmly on the pedals.
- To move forward, pedal in a forward motion. The fixed pinion system allows for continuous pedaling.
- To slow down or stop, use the hand brake lever. The fixed pinion also allows for some braking by resisting the pedals.
- Steer the go-kart by turning the steering wheel left or right. The sports steering wheel is designed for easy maneuverability.
Adjusting the Seat:
The seat can be adjusted to accommodate children of different heights and leg lengths. To adjust, loosen the fasteners located beneath the seat, slide the seat to the desired position, and then re-tighten the fasteners securely. Ensure the seat is stable before the child uses the go-kart.
5. Maintenance
Regular maintenance will ensure the longevity and safe operation of your INJUSA Go Kart.
Cleaning:
Clean the go-kart with a damp cloth and mild soap. Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the plastic and metal components.
Lubrication:
Periodically lubricate moving parts such as the chain, pedal mechanism, and steering joints with a suitable, non-toxic lubricant. This helps ensure smooth operation and reduces wear.
Inspection:
Regularly check all screws, nuts, and bolts to ensure they are tight. Inspect the wheels and tires for any signs of wear, cracks, or damage. Ensure the brake mechanism is functioning correctly and the brake cable is not frayed or loose.
Storage:
When not in use, store the go-kart in a dry, covered area away from direct sunlight and extreme temperatures. This will prevent material degradation and prolong its lifespan.
6. Troubleshooting
If you encounter any issues with your Go Kart, refer to the following common problems and solutions:
- Go-kart does not move when pedaling: Check if the chain is properly engaged and not loose. Ensure the fixed pinion mechanism is functioning correctly and not jammed.
- Steering is stiff or difficult: Inspect the steering column and front axle for any obstructions, dirt, or damage. Lubricate moving parts if necessary. Ensure all steering components are securely fastened.
- Brake is not effective: Check the brake cable for proper tension and ensure it is not frayed. Inspect the brake pads (if applicable) for wear and the braking mechanism for proper engagement with the wheel. Adjust as needed.
- Unusual noises during operation: Stop using the go-kart immediately. Inspect all moving parts, wheels, and axles for any loose components, foreign objects, or damage. Tighten any loose fasteners.
If the problem persists after attempting these solutions, please contact INJUSA customer support.
7. Specifications
Detailed technical specifications for the INJUSA Go Kart Mercedes 4122:
| Feature | Detail |
|---|---|
| Model Number | 4122 |
| Brand | INJUSA |
| Recommended Age | 2+ Years (24 months - 2 years as per manufacturer specification) |
| Dimensions (L x W x H) | 89 cm x 60 cm x 50 cm |
| Weight | 5.5 kg |
| Material | Metal, Plastic |
| Safety Certification | European EN71 |
| Key Features | Adjustable high backrest, wide wheels, pedals, brake, fixed pinion, realistic sports steering wheel |

Image: Go Kart with labeled dimensions.
8. Warranty and Support
Manufacturer's Warranty:
INJUSA offers a 2-year warranty against manufacturing defects from the date of purchase. Please retain your proof of purchase for warranty claims.
Spare Parts:
Spare parts for the INJUSA Go Kart Mercedes 4122 are available for up to 10 years after the purchase date. Contact customer support for inquiries and orders.
Contact Support:
For technical assistance, spare parts, or warranty claims, please contact INJUSA customer service:
- Company: Industrial Juguetera S.A.
- Address: Avenida Azorín 20, 03440 Ibi, Alicante, España
- Phone: +34 96 555 08 62
- Email: info@injusa.com / service@injusa.com

Image: INJUSA Company Logo.

