This manual begins with essential safety instructions, warning users about the hazardous nature of the fuel, hot engine parts, and the need for protective eyewear. It also stresses proper handling, storage, and the importance of passing the safety information to any new owner.
The remainder of the guide covers engine construction, installation of standard accessories, carburetor adjustment, starting procedures, running‑in, final tuning, and routine care. Detailed parts lists, exploded views, and tool references help users maintain optimal performance and replace worn components.
| Engine model | R2104 |
|---|---|
| Piston liner ports | 9‑port |
| Gasket thickness | 0.1 mm / 0.15 mm |
| Fuel line inner diameter | 2.5 mm |
| Dust cap sizes | 3 mm, 16 mm, 18 mm |
Close the throttle to idle, shut off the trim lever on the transmitter, and pinch the fuel‑delivery tube to cut off fuel.
After running‑in, close the needle valve 10‑15° and test the vehicle; further adjust in small increments until the highest straight‑line speed is achieved without overheating.