Is adding one liter of engine oil too much for a underbone motorcycle?
2 Answers
A bit too much, which may cause oil burning or reduced power. It's better to drain some if possible. Here are the relevant details: 1. Oil quantity: For most common domestic motorcycles below 150CC, the oil quantity usually doesn't exceed one liter. Never fill the motorcycle engine oil to full capacity - the oil level should always be checked using the dipstick or oil inspection window. 2. Dangers of overfilling: Overfilling engine oil can cause multiple issues including engine overheating, power loss, oil leakage, blue smoke from the engine, and clutch disengagement failure. 3. Dipstick position: The oil dipstick is located at the rear of the right side cover of the engine. After removal, you'll see a crosshatched area at the end of the dipstick - this is the oil level indicator zone. The two ends of this zone represent the upper and lower limits of the oil quantity.
I've been riding motorcycles for over a decade, and when it comes to adding one liter of engine oil to a step-through motorcycle (essentially a regular motorcycle), it really depends on the model and displacement. For small-displacement bikes, like a 125cc engine, the oil capacity is typically around 0.8 liters. Adding a full liter could lead to overfilling, which might submerge the piston crankshaft, cause the oil to foam, and compromise sealing. Over time, this can also increase fuel consumption or cause engine overheating, which is quite dangerous. My advice is to always check the oil level with the dipstick during maintenance—ideally, it should be at the midpoint. If the level is low, just add a small amount; don't pour in the whole liter at once. Larger-displacement bikes might even find one liter insufficient, but to be safe, always rely on the dipstick to avoid the hassle of visiting a repair shop due to overfilling.
