1. Introduction
This manual provides essential information for the safe and effective assembly, operation, and maintenance of your HHH Apollo AGB36 DB36 250cc Dirtbike. Please read this manual thoroughly before operating the vehicle and retain it for future reference. Proper understanding and adherence to these instructions will ensure optimal performance and longevity of your dirtbike.

Figure 1: HHH Apollo AGB36 DB36 250cc Dirtbike (Green Color)
2. Safety Information
WARNING: Adult supervision is required at all times when operating this vehicle. This product is intended for off-road use only. Operating this vehicle can be dangerous and may result in serious injury or death if not handled properly.
Your dirtbike is shipped 70% assembled inside a metal crate. A certified technician is required for assembly, preparation, basic care, and maintenance, as well as for addressing any technical issues. Failure to comply may void warranty and compromise safety.
Always wear appropriate safety gear, including a helmet, eye protection, gloves, and protective clothing, when riding. Ensure all components are securely fastened and in good working order before each ride.
3. Setup and Assembly
The HHH Apollo AGB36 DB36 250cc Dirtbike requires final assembly by a qualified technician. The following general steps outline the assembly process:
- Uncrating: Carefully remove the dirtbike from its metal shipping crate. Inspect for any shipping damage.
- Front Wheel Installation: Attach the front wheel to the forks, ensuring the brake caliper aligns correctly with the brake disc. Secure all bolts to the manufacturer's specified torque.
- Handlebar Installation: Mount the handlebars to the triple clamps. Adjust their position for comfortable riding and tighten all fasteners securely.
- Front Fender and Headlight Assembly: Install the front fender and headlight unit. Connect any necessary wiring for the headlight and turn signals.
- Rear Fender and Taillight Assembly: Attach the rear fender, taillight, and turn signals. Connect the wiring harness.
- Battery Connection: Connect the battery terminals, ensuring correct polarity (red to positive, black to negative). Secure the battery in its compartment.
- Fluid Checks: Verify engine oil levels, brake fluid levels, and fuel levels. Add fluids as necessary according to the specifications.
- Pre-Ride Inspection: Perform a comprehensive pre-ride inspection, checking tire pressure, brake function, chain tension, and all fasteners.

Figure 2: Side view of the HHH Apollo AGB36 Dirtbike during assembly.
4. Operating Instructions
The HHH Apollo AGB36 DB36 250cc Dirtbike features a 5-speed manual transmission and both electric and kick start systems.
- Starting the Engine:
- Ensure the fuel valve is open.
- If the engine is cold, engage the choke.
- For electric start, turn the ignition key to 'ON' and press the electric start button.
- For kick start, turn the ignition key to 'ON' and firmly push down on the kick start lever.
- Once the engine starts, gradually disengage the choke as the engine warms up.
- Gear Shifting: The dirtbike is equipped with a 5-speed manual transmission. Use the clutch lever and foot shifter to change gears smoothly. Practice shifting in a safe, open area before riding at speed.
- Braking: The dirtbike features hydraulic disc brakes. Use both the front and rear brakes for effective stopping. Apply brakes smoothly and progressively to avoid skidding.
- Throttle Control: Apply throttle gradually from a standing or starting position. Applying full throttle immediately can cause the front wheel of the motorcycle to rise up, potentially leading to loss of control and serious injury or death.
5. Maintenance
Regular maintenance is crucial for the performance and safety of your dirtbike. Always refer to a qualified technician for complex maintenance tasks.
- Oil Changes: Regularly check and change the engine oil according to the recommended schedule in the full service manual.
- Chain Maintenance: Keep the drive chain clean, lubricated, and properly tensioned. Adjust as needed to prevent excessive slack or tightness.
- Tire Pressure: Check tire pressure before each ride. Maintain recommended pressure for optimal handling and tire longevity.
- Brake System: Inspect brake pads for wear and brake fluid levels regularly. Ensure brakes are functioning correctly and provide adequate stopping power.
- Air Filter: Clean or replace the air filter periodically, especially after riding in dusty conditions, to ensure proper engine breathing.
- Fastener Checks: Regularly inspect all nuts, bolts, and fasteners for tightness. Tighten any loose components to prevent parts from detaching during operation.

Figure 3: Engine detail, important for maintenance checks.
6. Troubleshooting
This section addresses common issues you might encounter with your HHH Apollo AGB36 DB36 250cc Dirtbike. For complex problems, consult a certified technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | No fuel, dead battery, spark plug issue, choke not engaged/disengaged. | Check fuel level, charge/replace battery, inspect/replace spark plug, adjust choke. |
| Loss of power/poor performance | Clogged air filter, old fuel, carburetor issues, incorrect spark plug gap. | Clean/replace air filter, use fresh fuel, clean carburetor, check spark plug gap. |
| Brakes feel spongy or weak | Low brake fluid, air in brake lines, worn brake pads. | Check fluid level and add if low, bleed brake lines, replace brake pads. |
| Chain noise or excessive slack | Improper chain tension, lack of lubrication, worn chain/sprockets. | Adjust chain tension, lubricate chain, inspect and replace worn components. |
7. Specifications
| Feature | Detail |
|---|---|
| Bike Type | Dirtbike |
| Age Range (Description) | Adult |
| Brand | HHH |
| Number of Speeds | 5 |
| Color | Green |
| Wheel Size | 21 Inches (Front), 18 Inches (Rear) |
| Suspension Type | Front Suspension: Non-Adjustable 750 mm; Rear Suspension: Non-Adjustable 320 mm |
| Included Components | 250cc Sports bike, Front Suspension: 54mm wide inverted Front forks with 265 mm travel and 910 mm length, Seat, Seat Height: 36.6 inches, Transmission: Manual Gears: 5 Speed |
| Size | X-Large |
| Brake Style | Hydraulic Disc |
| Item Weight | 350 Pounds |
| Theme | Motorcycle |
| Style | Sports Dirtbike |
| Model Name | AGB-36 250cc |
| Power Source | Gas |
| Wheel Material | Alloy Steel |
| Year | 2022 |
| Maximum Weight Recommendation | 440 Pounds |
| Assembly Required | Yes |
| Bicycle Gear Shifter Type | Down Tube |
| Skill Level | All |
| Minimum User Height | 36 Inches |
| Frame Material | Steel |
| Derailleur Configuration | Rear |
| UPC | 619837827676 |
| Bicycle Drivetrain Type | Chain Drive |
| Manufacturer | HHH |
| Frame Size | Large |
| Frame Type | Twin-Spar |
| Item Package Dimensions L x W x H | 73 x 35 x 18 inches |
| Package Weight | 350 Pounds |
| Item Dimensions LxWxH | 84.3 x 32.3 x 48.6 inches |
| Brand Name | HHH |
| Date First Available | November 5, 2021 |
8. Warranty and Support
Your purchase includes a 30-day warranty for replacement of defective parts. This warranty does not cover accidents, abuse, neglect, labor, or mechanic services required for warranty claims. All shipping costs are not covered. Minor dents and scratches that occur during transit are also not covered.
For customer support, please refer to the contact information provided by your retailer or the manufacturer, HHH.
9. Legal Disclaimer
Adult supervision is required at ALL times. The product is shipped brand new inside a metal crate in a box. In no event will HHH and all its affiliates be liable for damages, lost revenue, lost wages, lost savings, or any other incidental or consequential damages arising from purchase, use, or inability to use the product or for manufacturer's defects. NO RETURNS OR REFUNDS are available for this item. A contact phone number is required for the trucking company for delivery.