HPI Racing R40 12820 Instruction Manual
![HPI Racing R40 12820 Race Kit manual cover](/images/QxlnrEoefHHdapHLBXYtnQEv/thumbs/thumb175x175.webp)
To assemble the HPI Racing R40 12820 Race Kit, start by carefully reading the manual included in the kit. Organize all parts and tools before starting. Follow the step-by-step instructions for chassis, suspension, and drivetrain assembly, ensuring all fasteners are tightly secured.
Regularly clean the chassis and components to remove dirt and debris. Inspect moving parts for wear and replace if necessary. Check all screws and fasteners for tightness, and lubricate bearings and joints as needed to ensure smooth operation.
If experiencing steering issues, first check the steering servo and linkage for any obstructions or damage. Ensure the servo horn is properly attached and calibrated. Examine the steering mechanism for any loose screws or components and tighten them.
The R40 Race Kit is designed for nitro fuel. Use high-quality nitro fuel with a nitromethane content of 20-30% for optimal performance and engine longevity. Always follow the manufacturer's recommendations for fuel mix ratios.
Adjust the suspension settings by modifying the shock absorber positions and spring tension. Experiment with different setups such as softer springs for more grip or stiffer settings for better stability at high speeds, depending on track conditions.
If the engine won't start, check the glow plug for function and replace if necessary. Ensure the fuel lines are clear and fuel is reaching the engine. Verify that the carburetor is set to the correct idle position and adjust if needed.
To improve top speed, consider upgrading the engine to a higher performance model, or adjust the gear ratio by changing the pinion or spur gear. Ensure that all components are in good condition to handle increased speeds.
Signs that you need new tires include noticeable wear or balding, reduced grip during turns, or visible cracks in the rubber. Regularly inspect tires and replace them when these signs are present to maintain optimal performance.
The R40 Race Kit is primarily designed for on-road racing. Using it on off-road tracks may lead to damage due to its low ground clearance and on-road suspension setup. Consider using a different model specifically designed for off-road conditions.
Store the R40 Race Kit in a cool, dry place away from direct sunlight. Remove the fuel from the tank and clean the car thoroughly before storage. Disconnect the battery to prevent drainage and damage.