RETROL HM-01 7cc Model Hit and Miss 4-stroke, Resonating Exhaust Pipe Design: One of the unique features of the RETROL HM-01 engine is the inclusion of a resonating exhaust pipe design. This design reproduces the exhaust sound and adds a unique aesthetic appeal. The sound can be heard when the engine operates at extremely low speeds, offering an immersive and realistic experience.

Quick-Slow Speed Switch: A specially designed feature rarely seen in other engines, the “quick-slow speed switch” allows users to switch between ultra-low speeds and high speeds for power output. This feature provides a greater sense of playability and control, offering a versatile experience for engine enthusiasts.

User-Friendly Carburetor Design: The novel carburetor design of the RETROL HM-01 engine makes it easier to adjust, particularly for beginners. This user-friendly feature simplifies the tuning process and enhances the overall usability of the engine.

Adjustable Main Oil Cup: The engine incorporates a transparent and adjustable main oil cup. This feature allows for precise lubrication, ensuring enhanced durability and a longer lifespan for the engine.

RETROL HM-01 7cc Model Hit and Miss 4-stroke

One flywheel is equipped with a spring-loaded ball design, while the other features a split-type wide-faced belt pulley, making the engine highly practical for power output.

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