1. Introduction
The LEGO NINJAGO Kai's Motorcycle Speed Race (71838) set is designed for builders aged 6 years and up. This set allows children to recreate thrilling chase scenes from the NINJAGO Dragons Rising Season 3 television series, featuring Kai and the Spectral Dragonian Scout.
This set includes two minifigures, each with their own unique motorcycle and weaponry, providing dynamic play opportunities. The motorcycles feature spinning wheels for engaging action.

Image: A child engages in imaginative play with the LEGO NINJAGO Kai's Motorcycle Speed Race set, featuring both ninja bikes and minifigures.
2. Components
The LEGO NINJAGO Kai's Motorcycle Speed Race set (71838) contains 79 pieces, including:
- Kai Minifigure: The Master of Fire, equipped with a translucent reveal blade and twin golden katana swords.
- Kai's Flame-Powered Race Bike: A red and gold motorcycle designed for speed.
- Spectral Dragonian Scout Minifigure: A menacing antagonist with a sword accessory.
- Spectral Dragonian Scout's Ghostly Demon Bike: A black and light blue motorcycle.
- Various LEGO building elements required for assembly.

Image: The two minifigures included in the set: Kai and the Spectral Dragonian Scout, showcasing their detailed designs.
3. Setup and Assembly
Assembly of the LEGO NINJAGO Kai's Motorcycle Speed Race set is straightforward and designed for an intuitive building experience. Follow the step-by-step instructions provided in the included manual.
- Unpack Components: Carefully open the packaging and sort the LEGO building elements.
- Consult Instructions: Refer to the printed instruction booklet for detailed assembly steps. Each step clearly illustrates which pieces are needed and how they connect.
- Utilize the LEGO Builder App: For an enhanced building experience, download the official LEGO Builder app. This app provides 3D viewing tools, allowing you to rotate and visualize the model during construction.
- Assemble Minifigures: Construct the Kai and Spectral Dragonian Scout minifigures and equip them with their respective weapons.
- Build Motorcycles: Follow the instructions to build Kai's flame-powered race bike and the Spectral Dragonian Scout's ghostly demon bike.

Image: A child uses the LEGO Builder app on a tablet to follow interactive 3D instructions for assembling a LEGO model.
4. Operating and Play
Once assembled, the LEGO NINJAGO Kai's Motorcycle Speed Race set offers various play possibilities:
- Staging Races: Position Kai and the Spectral Dragonian Scout on their motorcycles and engage in high-speed chase scenarios. The spinning wheels allow for dynamic movement across surfaces.
- Battle Recreations: Use the minifigures' weapons, such as Kai's katana swords and the Spectral Dragonian Scout's blade, to stage epic battles between the characters.
- Imaginative Storytelling: Encourage creative play by inventing new adventures and storylines for Kai and the Spectral Dragonian Scout within the NINJAGO universe or beyond.
- Combine with Other Sets: This set can be combined with other LEGO NINJAGO sets (sold separately) to expand play possibilities and create larger, more intricate scenes.

Image: The two ninja motorcycles in action, demonstrating their moving wheels and dynamic design for racing play.
Video: A 360-degree view of the LEGO Ninjago Kai's Motorcycle Speed Race set (71838), showcasing both motorcycles and minifigures from all angles.
5. Maintenance
To ensure the longevity and cleanliness of your LEGO set, follow these simple maintenance guidelines:
- Cleaning: Use a soft brush or a damp cloth with mild soap to gently clean LEGO bricks. Avoid harsh chemicals or abrasive materials.
- Storage: Store the assembled model and any spare parts in a cool, dry place away from direct sunlight to prevent discoloration or damage.
- Handling: Handle the set with care to avoid accidental disassembly or loss of small pieces.
6. Troubleshooting
If you encounter any issues with your LEGO NINJAGO Kai's Motorcycle Speed Race set, consider the following:
- Missing Pieces: If you find a piece missing during assembly, first double-check the packaging and surrounding area. LEGO offers a service to replace missing bricks; visit their official website for details.
- Assembly Errors: If the model does not look correct or parts do not fit, re-examine the instruction manual carefully. Sometimes a small error in an earlier step can affect later assembly.
- Loose Connections: Ensure all bricks are firmly pressed together. LEGO connections should feel secure.
7. Specifications
| Feature | Detail |
|---|---|
| Product Name | LEGO NINJAGO Kai's Motorcycle Speed Race |
| Model Number | 71838 |
| Item Model Number (Internal) | 6526915 |
| Number of Pieces | 79 |
| Recommended Age | 6 years and up |
| Product Dimensions | 7.52 x 5.55 x 1.81 inches |
| Item Weight | 4.9 ounces |
| Manufacturer | LEGO |
| Release Date | July 31, 2025 |
8. Warranty and Support
LEGO products are manufactured to high-quality standards. For information regarding product warranty, missing parts, or customer support, please visit the official LEGO website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
Online Support: www.lego.com/service





