HPI Racing Nitro RS4 3 Drift 115893 Exploded View
![HPI Racing Nitro RS4 3 Drift 115893 Race Kit manual cover](/images/zrSuMkuQiqIcIoXjYsrNLtsc/thumbs/thumb175x175.webp)
To break in the engine, start by using a fuel with at least 16% oil content. Allow the car to idle for one full tank, then run it at half throttle for the next few tanks. Gradually increase the throttle over the next tanks while keeping an eye on the engine temperature.
After every run, clean the chassis and check for any loose screws. Weekly, inspect the drivetrain and suspension components. Monthly, clean the air filter and check the clutch bell and spur gear for wear.
Check the glow plug to ensure it is functioning properly. Verify that the fuel lines are free of blockages and that the carburetor settings are correct. Also, make sure the pull starter cord is not stuck or damaged.
Inspect the throttle linkage for binding or misalignment. Ensure the carburetor is fully opening at full throttle. Check the clutch shoes and springs for wear and verify that the air filter is clean.
Adjust the suspension setup by decreasing the ride height and stiffening the shocks. Use drift-specific tires and consider adding a drift gyro for better control. Adjust the camber and toe settings to your preference.
Use a high-quality nitro fuel with a nitromethane content of 20% to 30% and an oil content of at least 8%. This will ensure optimal performance and engine longevity.
Start with the factory settings, then adjust the high-speed needle for top-end performance, ensuring the engine doesn't run too lean. Adjust the low-speed needle for smooth acceleration and reliable idle.
Drain the fuel tank and run the engine until it stalls to clear any remaining fuel. Clean the car thoroughly, remove the batteries, and store the car in a cool, dry place. Consider using after-run oil in the engine to prevent corrosion.
Check the clutch bell and clutch shoes for wear. Replace them if necessary. Ensure the clutch springs are intact and properly tensioned. Clean the clutch components to remove any oil or dirt.
Essential tools include a hex driver set, a Phillips screwdriver, pliers, a glow plug igniter, and a temperature gun. A tuning screwdriver and a clutch tool are also helpful for specific maintenance tasks.