HPI Racing Trophy 4.6 Buggy 101872 Exploded View
![HPI Racing Trophy 4.6 Buggy 101872 Race Kit manual cover](/images/TiWoKitrxUvLvRtQCtwaCLNY/thumbs/thumb175x175.webp)
To break in the engine, start by running the engine at a rich setting for about 3-5 tanks of fuel. Avoid full throttle during this period, and let the engine cool between tanks to ensure proper seating of the internal components.
Use a high-quality nitro fuel with a 20-25% nitromethane content for optimal performance and engine longevity.
Start by setting the high-speed needle valve to factory settings, then adjust by leaning or richening the mixture as needed. Listen for a smooth, consistent engine sound and ensure good acceleration without hesitation.
Check that the glow plug is functioning, ensure the fuel is reaching the engine, and verify that the battery is charged. If these are in order, try adjusting the carburetor settings or replacing the glow plug.
Clean the air filter after every 2-3 runs to prevent dust and debris from entering the engine, which can cause damage and reduce performance.
Regularly check the suspension arms, shock absorbers, and linkage for wear and damage. Lubricate moving parts and replace worn components to maintain optimal handling and performance.
Tighten the slipper clutch nut until fully tight, then back it off by 1/4 to 1/2 turn. Adjust as needed based on track conditions and desired traction.
After racing, clean the buggy thoroughly, check for any damaged parts, tighten screws, and perform necessary repairs. Inspect the drivetrain and suspension, and ensure the air filter and engine are clean.
This could be due to a clogged air filter, incorrect carburetor settings, or a worn clutch. Check these components and make adjustments or replacements as necessary.
Drain the fuel, clean the buggy, and lubricate moving parts. Store it in a cool, dry place, and remove the batteries to prevent leakage.