
Underbone motorcycle oil pumps are located inside the oil pan. Oil pump: In the lubrication system, this device forces oil from the oil pan to the engine's moving components. It functions to increase oil pressure and ensure proper oil volume, forcibly supplying oil to various friction surfaces. Internal combustion engines commonly use gear-type and rotor-type pumps. Function of oil pump: The oil pump's function is to elevate oil to a certain pressure and then forcibly deliver it to the moving surfaces of engine components. Oil pumps can be structurally classified into gear-type and rotor-type categories. Gear-type oil pumps are further divided into internal gear and external gear types, with the latter commonly referred to simply as gear-type oil pumps.

I've been riding underbone bikes for many years, and the oil pump is located beneath the engine, near the crankcase, usually inspected through the side cover. Why is this important? The oil pump is the heart of oil circulation – if it fails, the engine can easily overheat and get damaged. I've experienced a clogged pump before, which caused loud startup noises and increased fuel consumption. You can find it by opening the side cover; on underbone models like the Honda Cub, the pump is on the left side – check if the oil hose connection is loose. For maintenance, I recommend checking oil levels monthly and cleaning the pump filter during oil changes. Don't skimp by using low-quality oil – proper maintenance extends engine life and saves money in the long run.

As someone who frequently writes technical posts, I must say the scooter's oil pump is located at the lower part inside the engine, connecting the oil pan and crankshaft. Though not a large component, it's absolutely critical. The pump's power comes from the rotation of the crankshaft, and its position is designed to simplify maintenance. To locate it, open the left-side cover panel – that small silver pump you see is the one. A faulty pump can cause starting difficulties or abnormal vibrations. It's recommended to check oil pressure readings every 5,000 kilometers and use a stethoscope to listen for consistent pump operation sounds. Never overlook this, or you risk serious engine damage.

As someone who rides a step-through motorcycle daily, I know the oil pump is located under the engine and visible once opened. It's small but crucial—without it, oil wouldn't circulate into the engine, and the chain could easily jam. Its position is easy to identify, usually inside the right-side protective cover. If the bike hesitates during startup or the dashboard light comes on, the pump might be faulty. It's important to regularly change to good quality oil to maintain smooth operation.


