The gear position of a three-wheeled motorcycle is closely related to fuel consumption. The core rule is: The matching between gear and speed determines fuel consumption, not the higher the gear. / The lower it is, the more fuel-efficient it is. The key is to "adapt the gear to the vehicle speed, load and road conditions". Combined with the usage scenarios of three-wheeled motorcycles (mostly for freight, urban and rural transportation), the specific relationship and precautions are as follows：

1. Core relationship (popular and easy to understand)

Three-wheeled motorcycle gears (including high and low speed gears) + forward gear), which essentially adjusts the ratio of engine speed to vehicle speed：

The gear is too low (such as low speed, high speed, forward 1 gear, 30 km/h）: The engine speed soars (the roar is loud), but the vehicle speed cannot increase, the fuel is not burned fully, and the fuel consumption directly doubles. This will also wear the engine in the long run.

The gear is too high (such as high speed for heavy load, forward 5th gear and low speed for moving the car): If the engine speed is too low (insufficient power), the vehicle will be sluggish and weak, and you need to increase the accelerator to maintain driving. This will also increase fuel consumption and may damage the clutch and rear axle.

Gear matching (corresponding to vehicle speed and load): The engine speed is maintained within a reasonable range (2500-4000 rpm for most models), the fuel is fully burned, and the fuel consumption is the lowest. At the same time, the vehicle runs smoothly and the component loss is small.

2. Combined with the specific fuel consumption differences between high and low speed gears (key points)

The high and low speed gears of a three-wheeled motorcycle (necessary for heavy loads) have a more obvious impact on fuel consumption than the forward gear.：

Low gear ( L files): High torque and high speed, suitable for heavy loads and hill climbing, but high fuel consumption (0.5-1 higher than high speed gear) L / 100 kilometers), but it can avoid the waste of extra fuel consumption caused by insufficient power.

High gear ( H files): Stable speed and uniform power output, suitable for no-load / It is the most economical driving gear with the lowest fuel consumption when driving at a light load and on flat roads at a constant speed.

3. Key precautions (avoid pits and reduce fuel consumption) + protect vehicle)

Prohibition of "low-speed and high-speed”: For example, use low gear and forward 2 gear to run 40 km/h, When the engine runs at high speed, fuel consumption soars and the engine overheats.

Prohibit "high-speed, low-speed / Overload”: For example, use high gear and forward 4 gear to pull heavy loads (800 kg (above) or climbing a steep slope, the vehicle will not go fast even if the accelerator is increased, fuel consumption will increase, and it is easy to cause clutch slippage.

Use low gear for starting and climbing (low gear + Low forward gear), switch to high gear after smoothening: Use low gear when starting + 1 gear to avoid starting with a heavy throttle； Switch to high gear after constant speed on flat road + 3-4 gear to maintain a reasonable speed.

The greater the load, the lower the gear needs to be: When hauling a full load, it is recommended to use a low gear even on a flat road to avoid driving in a high gear, which will consume more fuel.

Brief summary: Adaptation means fuel-saving. The low-speed gear corresponds to heavy loads, climbing hills, and low-speed driving. The high-speed gear corresponds to light loads, flat roads, and constant speed driving. The gear position matches the vehicle speed and load, which is the most fuel-efficient state.