Why Does the Motorcycle Make a Zizi Sound When Accelerating?
2 Answers
The following are the reasons why a motorcycle makes a zizi sound when accelerating: 1. Air intake pipe perforation or air leakage: Many vehicles nowadays use engineering plastic for the air intake pipe. When the pipe ages, it is likely to develop air leaks, resulting in a zizi sound during acceleration. 2. Excessive or loose valve clearance: Valves can also wear out. When the wear reaches a certain level, the valve clearance becomes too large, causing a zizi sound as air passes through the valve. 3. Dirty engine oil: Engine oil provides lubrication, but if the oil is not changed for a long time, it can accumulate dirt, leading to insufficient lubrication and abnormal noises from the engine.
I remember my old motorcycle always made a sizzling sound when accelerating. Later I found out it was due to an exhaust leak at the pipe joint. When the rubber gasket aged, hot exhaust gases would escape through the gaps, making a hissing sound like air leakage. Last time I took it apart and sure enough the sealing ring was cracked - replacing it immediately made it quiet again. Also, if the fuel tank cap isn't tightened properly, it can produce similar sounds as air rushes into the fuel inlet at high speeds, making a gurgling noise like boiling water. Loose belts can also slip and squeal during acceleration, especially when wet from rain - that sound really makes your scalp crawl. I'd suggest checking these common trouble spots first.
