Introduction

The Razor Dirt Rocket Bike MX500 is an electric motocross bike designed for thrill-seekers aged 14 and up. With its authentic dirt bike frame geometry and powerful 500-watt motor, it reaches speeds of up to 15 mph, making it perfect for off-road adventures. Features include dual suspension for a smooth ride, large pneumatic tires for traction, and hand-operated dual disc brakes for safety. The MX500 is priced at approximately $499.99, offering an exciting riding experience.

PRODUCT PARTS

Keep your motorbike running for years with genuine Razor parts. Visit our website for more information on spare part availability.  (Illustrations may not reflect the exact appearance of the actual product. Specifications are subject to change without notice.)

1. Handlebar grip (right/left)
2. Twist grip throttle
   • 1 Sleeve
3. Front brake lever assembly (right)
4. Handlebar
5. Rear brake lever assembly (left)
6. Front fork
7. Front fender
8. Handlebar clamp (upper/lower)
9. Front-wheel complete
10. Caliper brake (2)
11. Shock absorber
12. Control module
13. Battery (3- 12V/ 12Ah) w/ Fuse
14. SX500/MX500 motor (36V/500W) MX650 motor (36V/650W)
15. Kickstand
16. Rear wheel complete
17. Chain
18. Chain guard
19. Battery cover (left/right)
20. On/ Off switch
21. Charger port 
22. Seat fairing

Specifications 

• Powerful 500-watt electric motor
• Speeds up to 17 miles per hour
• Durable steel frame construction
• Adjustable handlebars for customized fit
• Retractable kickstand for easy parking
• 36V rechargeable battery with up to 2 hours of continuous use
• Maximum weight capacity: 220 pounds
• Age recommendation: 14 years and above

Description

One electric dirt bike that stands out from the crowd is the Razor Dirt Rocket Bike MX500, thanks to its combination of stylish appearance and sturdy engineering. The steel frame guarantees long-term stability, and the adjustable handlebars let riders discover the ideal posture for their ride. From smooth routes to rugged dirt tracks, the bike's big knobby tires offer exceptional grip. You can easily park and store the bike while it's not in use thanks to the retractable kickstand.

The MX500 has a variable-speed throttle and a chain-driven motor, both of which allow for regulated acceleration and efficient power delivery. This bike will be the envy of the road with its flashy colors and bold design.

BEFORE YOU BEGIN

Remove contents from the box. Remove the separators that protect the components from damage during shipping. Inspect the contents of the box for scratches in the paint, dents,, or kinked cables that may have occurred during shipping. Because the motorbike was 95 percent assembled and packed at the factory, there should not be any problems, even if the box has a few scars or dents.
MAKE SURE THE POWER SWITCH IS TURNED “OFF” BEFORE CONDUCTING ANY ASSEMBLY OR  MAINTENANCE PROCEDURES.

WARNING: DO NOT USE NON-RAZOR PRODUCTS WITH YOUR RAZOR-ELECTRIC MOTORBIKE. The motorbike has been built to certain Razor design specifications. The original equipment supplied at the time of sale was selected based on its compatibility with the frame, fork, and all other parts. Certain aftermarket products may not be compatible and will void the warranty.

Estimated Assembly and Set-Up Time

Razor recommends assembly by an adult with experience in bicycle mechanics. 

• Allow up to 30 minutes for assembly, not including initial charge time. 
• Allow up to 12 hours for charge.

Charger 
(Note: Charger design may vary  from one shown)

Product ID Locations: See locations to the left

1. Battery cover
2. The frame (underneath the unit)
3. Charger
4. Box - side of UPC (not shown)

 Required Tools

1. 5 mm and 6 mm Allen wrenches
2. 10 mm, 14 mm and 17 mm wrenches  (MX500/MX650 Models)
   10 mm, 17 mm, and 19 mm wrenches  (SX500 Model)
3. Phillips screwdriver
4. Spoke tightener

Plastic Bag Contents

• Charger
• Handlebar Clamps
• Front Axle Bolt
• Tools
• Owner’s Manual

ASSEMBLY AND SET-UP

Attaching the Handlebars

Tools required: 6 mm Allen wrench

1. Place the handlebars in the handlebar clamps with tools and manual.
   Note: Handlebar clamps are located in the plastic bag.
2. Align parallel to the fork and tighten the bolts using a 6 mm Allen wrench. When properly tightened, the handlebars should not move forward or backward. 

3. Adjust the brake lever adjuster to the proper place and tighten it with the 5 mm Allen wrench.

   

 Attaching the Front Fender

Tools required: 10 mm wrench and 5 mm Allen wrench

Note: Front fender design may vary.

1. Align the fender with the hole in the fork and insert the bolt. Tighten securely using a 10 mm wrench and a 5 mm Allen wrench. 

   

Attaching the Number Plate

Tools required: Phillips screwdriver

• MX500/MX650 Models 
  Remove the screw from the front fork. Align the number plate with the hole in the fork and tighten it with a Phillips screwdriver.

• SX500 Model
  Slip the cables through the slit on the top of the number plate. Align the number plate with the holes on the fork and snap on the number plate.

  

Installing the Front Wheel

Tools required

• 14 mm wrench and 17 mm wrench (MX500/MX650 Models)
• 17 mm wrench and 19 mm wrench (SX500 Model)

WARNING: Failing to properly adjust and tighten the nuts and bolts that affix the fork can cause you to lose control and fall.

1. Position the wheel in the front fork and slide the disk brake into the caliper.

2. Slide axle through fork, spacer, and wheel hub. When the axle passes through the other side of the wheel hub, add the other spacer, and slide through the fork. Secure with a washer and nut.
   Note: The front axle is installed with the spacer between the fork and wheel for all Dirt Rockets. 

   

MX500/MX650 Models
3 With a 14 mm and 17 mm wrench, tighten the front wheel. 

SX500 Model
3 With a 17 mm and 19 mm wrench, tighten the front wheel. 

Inflating the Tires

Tires are inflated when shipped, but they invariably lose some pressure between the point of manufacturing and your purchase.

1. Using a bicycle-style tire pump equipped with a Schrader-type valve, inflate the front tire to the correct PSI indicated on the sidewall of the tire.

WARNING:  Do not over-inflate, as this could damage the tire or wheel.
Note: The pressurized air supplies found at gasoline stations are designed to inflate high-volume automobile tires. If you decide to use such an air supply to inflate your motorbike tires, first make sure the pressure gauge is working, then use very short bursts to inflate to the correct PSI. If you inadvertently over-inflate the tire, release the excess pressure immediately.

CHARGING THE BATTERY

Your electric motorbike may not have a fully charged battery; therefore you must charge the battery before use.  

• Initial charge time: 12 hours.
• Recharge time: up to 12 hours, even if the light turns green. The recommended maximum charging time is 24 hours.
• Always charge the battery immediately after riding.
• Fully charge the battery before storing it for extended periods.
• Unplug the charger from the wall outlet when not in use.
• Failure to recharge the battery periodically may result in a battery that will not accept a charge. 
• Make sure the power switch is turned OFF when the unit is not in use. If the power switch is left on for an extended period, the battery may reach a stage at which it will no longer hold a charge.
• To ensure long battery life, never store the product in freezing or below-freezing temperatures! Freezing will permanently damage the battery.
• Run time: Up to 40 minutes of continuous ride time. Run time may vary depending on riding conditions, rider weight, climate, and/or proper maintenance.
• Battery life can vary depending on the proper maintenance and usage of the unit.

WARNING: Use ONLY with the recommended charger. Batteries are only to be charged under adult supervision. The charger is not a toy. Always disconnect the charger before wiping down and/or cleaning the motorbike with a damp cloth.
The charger supplied with the motorbike should be regularly examined for damage to the cord, plug, enclosure,, and other parts. In the event of such damage, the electric motorbike must not be charged until it has been repaired or replaced.
Chargers have built-in overcharge protection to prevent the battery from being overcharged. 
Note: If the charger gets warm during regular use, this is a normal response and is no cause for concern. If your charger does not get warm during use, it does not mean that it is not working properly. 

• Wall outlet - Green
• Wall outlet and unit - Red (charging) 
• Wall outlet and unit - Green (charged)

Note: Continue charging the unit even if the light turns green before 12 hours.
WARNING: Failure to recharge the battery at least once a month may result in a battery that will no longer accept a charge.

Note: Make sure power is turned OFF when the unit is not in use. If the power switch is left on for an extended period, the battery may reach a stage at which it will no longer hold a charge.

1. Plug the charger into a wall outlet. The light on the charger should be green.
   Note: If the green light (LED) does not light up, try a different outlet.
2. Make sure the power switch is in the OFF position. Plug the charger into the charger port. The light on the charger should turn red during charging and then back to green when charging is complete.

PRE-RIDE CHECKLIST

Brake
Check the brakes for proper function. When you squeeze the lever, the brake should provide positive braking action. Make sure that the brakes are not rubbing when the lever is released.
Tires 
Periodically inspect the tires for excess wear and regularly check the tire pressure. Reinflate as necessary. 
Frame, Fork,, and Handlebars 
Check for cracks or broken connections. Although broken frames are rare, an aggressive rider can run into a curb or object, and wreck and bend or break a frame. Get in the habit of inspecting your motorbike regularly.
Hardware/Loose Parts
Before every ride, check all parts, such as nuts, bolts, cables, fasteners, etc., to ensure they are secure and assembled correctly. There should not be any unusual rattles or sounds from loose parts or broken components. If the unit is damaged, do not ride. Reference “Safety Warnings” on page 1 of this manual.

Safety Gear 
Always wear proper protective gear, such as an approved safety helmet. Elbow pads and kneepads are recommended. Always wear athletic shoes (lace-up shoes with rubber soles) and keep shoelaces tied and out of the way of the wheels, motor, and drive system. NEVER RIDE BAREFOOT OR IN SANDALS.
Laws and Regulations
Always check and obey any local laws or regulations.
Insurance
Do not assume that your existing insurance policies necessarily provide coverage for motorbike use. Check with your insurance company for insurance information.

Setup Guide

To set up your Razor Dirt Rocket Bike MX500, 

1. Start by unpacking all the components from the box. Ensure all parts are included before beginning assembly. Follow the instructions provided in the manual to attach the handlebars, seat, and any other components that may require assembly.
2. Next, charge the battery according to the manufacturer's instructions. 
3. Once fully charged, insert the battery into the designated compartment and make sure it is securely locked in place. 
4. Finally, check the tire pressure and adjust as necessary for optimal performance.

Before your first ride, familiarize yourself with the controls, including the throttle and brakes. Always wear safety gear such as a helmet and protective clothing when riding.

REPAIR AND MAINTENANCE

Turn the power switch “OFF” before beginning repair or maintenance:

• Read the instructions
• Remove charger plug
• Turn the power switch off
• Secure the unit under repair
• Exercise caution around exposed parts
• Contact Razor customer service if unsure about any repair or maintenance

Adjusting the Brakes

Tools required: 5 mm Allen wrench

1. To adjust brake cable play, thread the brake lever adjuster in or out 1/4 to 1/2 turn until the desired brake adjustment is attained. Most adjustments are complete at this step. If the brake still needs further adjustment, proceed to step 2.
2. If the brake has too much slack, loosen the rear anchor bolt with a 5 mm Allen wrench and pull the brake wire tighter. The distance of the brake wire between the end of the cable and the anchor bolt should be between 37 mm and 44 mm.

3. If the brake rotor is dragging on the brake pads, use your fingers to twist the caliper adjuster in either direction until the rotor is centered between the pads.

   

WARNING: The brake is capable of causing the electric motorbike to skid the tire throwing an unsuspecting rider. Practice in an open area free from obstacles until you are familiar with the brake function. Avoid skidding to a stop as this can cause you to lose control or damage the rear tire.

Testing the Brakes
To use the brakes, squeeze the levers to increase the pressure on the brake. The brake levers are fitted with a cable adjuster to compensate for cable stretch and/or to fine-tune the lever movement to brake engagement. If the brakes are not engaging properly, follow the instructions for adjusting the brakes.

Replacing the Fuse

1. Remove the seat fairing and battery cover to locate the 3 fuse boxes attached to the batteries. 
2. Check all 3 fuses to see if the fuse(s) have burnt out. Remove any fuse that is damaged or burnt out and replace it with a new one of equal amperage. 
   Note: Amperage is located on top of the fuse.

3. Close the fuse cover and reattach the seat fairing.

   

WARNING: To prevent shock, please follow the instructions accordingly and do not skip any steps.

Replacing the Chain and Tire

Tools required: Phillips screwdriver and two (2) 19 mm wrenches.

1. Loosen the screws and remove the chain guard. 
2. Using two 19 mm wrenches, loosen both axle nuts.

3. Push the chain tensioner down to loosen the chain and remove the chain from the wheel sprocket and motor sprocket. Push and remove the wheel downward.
   Note: Your hands will get greasy doing this.

   

4. Install the new chain or wheel by slipping the chain around the axle. Slide the axle into the slots on the frame. Slide the chain tensioner down and maneuver the chain onto the rear sprocket and motor sprocket.

5. Reattach the chain guard. Test ride and check. Readjust as needed.

   

Note: the arrangement of the hardware sequence: 

Right Side (Throttle)

• 16-1 Nut
• 16-2 Washer Frame
• 16-3 Spacer

Left Side (Brake)

• 16-1 Nut 
• 16-2 Washer Frame
• 16-3 Spacer

Spoke Tension

1. Verify the spoke tension by shaking each spoke with your fingers. Spoke should not be loose from the hub. Look for any play between where the spoke flanges attach to the hub. Try to turn the nipple using your fingers. You should not be able to spin any nipple by hand. If one or more spokes are loose, all spokes must be checked and need to be tightened with a spoke wrench. 

2. Start with the spoke closest to the tire valve stem and tighten each nipple, in sequence, exactly 1/4 to 1/2 turn. A single 1/4 to 1/2 turn may not be enough to bring the spokes into proper tension. Continue tightening all spokes, no more than 1/2 turn, in sequence until all spokes are tight. 
   Note: More than a 1/2 turn each can cause the wheel to become distorted and wobbly, thus permanently damaging the wheel. 

   

WARNING: Regularly check the spoke tension and retighten the spokes whenever loose. If you have any doubts, ask an experienced motorcycle or bicycle mechanic to inspect your spokes to determine if the spokes need tightening or adjusting.

Chain and Sprocket

Proper chain alignment must be maintained. The wheel must not be skewed. If the chain is noisy or running rough, check the lubrication, tension, and alignment of the sprockets, in that order.

WARNING: To avoid a pinch or injury, keep your fingers away from moving sprockets and chains.

Troubleshooting

Razor Dirt Rocket Bike MX500 Pros & Cons

Pros

• Powerful 500-watt motor for strong performance
• Durable steel frame for long-lasting use
• Adjustable handlebars for customized fit
• Retractable kickstand for convenience
• Affordable price point compared to other electric dirt bikes

Cons

• Limited range due to battery life (up to 2 hours)
• A weight capacity limit of 220 pounds may not be suitable for heavier riders
• Assembly is required which can be time-consuming for some users
• No suspension system which can make rough terrain rides uncomfortable

Customer Reviews

Customers have generally praised the Razor Dirt Rocket Bike MX500 for its power and durability. Many users appreciate its ease of assembly and the fun riding experience it provides. However, some users have noted that the battery life could be longer and that the lack of suspension can make rides on rough terrain less comfortable.

Common complaints include issues with the chain coming off during use and some users finding it difficult to adjust the handlebars.

WARRANTY

The manufacturer warrants this product to be free of manufacturing defects for a period of 90 days from the date of purchase. This Limited Warranty does not cover normal wear and tear, tires, tubes or cables, or any damage, failure, or loss caused by improper assembly, maintenance, storage, or use of the Razor Dirt Rocket SX500, MX500, and MX650