HPI Racing D8S 115878 Exploded View
![HPI Racing D8S 115878 Race Kit manual cover](/images/JXxhjTdeUHGMdVprQVuscIJH/thumbs/thumb175x175.webp)
To properly break in the engine, start by using a high-quality fuel with the recommended nitro content. Run the engine at a rich setting for the first few tanks, allowing it to idle and gradually increasing throttle. Avoid full throttle until the break-in process is complete.
Regular maintenance should include cleaning after every run, checking and tightening screws, inspecting the drivetrain and suspension components, and ensuring the air filter is clean and oiled. Perform a thorough inspection and lubrication of moving parts every 5-10 runs.
If the engine won't start, check the glow plug for functionality, ensure the fuel is reaching the carburetor, inspect the fuel lines for blockages, and verify that the battery is charged. Also, adjust the carburetor settings to ensure they are not too lean or too rich.
For bumpy tracks, use lighter shock oil (around 30-35wt) for better absorption. On smooth tracks, heavier oil (40-45wt) helps maintain stability. Adjust based on personal preference and driving style.
To adjust the suspension, start by tuning the ride height, camber, and toe settings. Use the turnbuckles to adjust camber and toe angles. For ride height, adjust the shock collars to balance the car's weight distribution.
Check the wheel nuts for tightness, inspect for bent or damaged wheel rims, and examine the bearings for wear. Replace any damaged components and ensure all parts are properly aligned.
Remove the air filter and wash it with soapy water. Rinse thoroughly and let it dry completely. Once dry, apply a thin layer of air filter oil to trap dust and debris. Reinstall the filter securely.
Check the antenna for damage and ensure it is fully extended. Verify that the transmitter and receiver are on the same frequency and there are no conflicting devices nearby. If interference persists, consider changing the frequency channel if possible.
To improve acceleration, consider changing to a lower tooth clutch bell or a higher tooth spur gear. Ensure the engine is properly tuned and the clutch shoes and springs are in good condition.
Common signs of engine wear include difficulty starting, reduced power, excessive smoke, unusual noises, and increased fuel consumption. Regular maintenance and timely replacement of worn parts can help mitigate these issues.