Can the silencer be removed from the stock exhaust of Kawasaki Z900?
2 Answers
Kawasaki Z900's stock exhaust cannot have its silencer removed. Once the silencer is taken off a motorcycle, the noise level becomes extremely high, and traffic police may issue penalty points if caught. Motorcycle Silencer: A motorcycle silencer is a device installed at the end of the motorcycle's exhaust pipe to reduce noise generated by exhaust emissions. It features a conical metal housing containing a silencing core. The housing's rear end is inwardly rolled, parallel to the housing wall. The silencing core consists of metal pipes of varying diameters welded together and inserted into holes on partitions within the housing. Regular Maintenance of Silencers: Since engine fuel does not combust completely during operation, and fuel contains certain impurities, high-temperature exhaust gases passing through the silencer will cause carbon deposits to accumulate on the silencer's core and partitions. Over time, these deposits can block airflow channels, increasing exhaust resistance, reducing silencing performance, causing engine power loss, and affecting normal vehicle operation. In severe cases, it may lead to blue discoloration of the exhaust pipe and engine damage due to overheating. Therefore, regular maintenance and cleaning of motorcycle silencers are essential.
As a seasoned rider of the Kawasaki Z900, I've seen many friends attempt to remove the factory-installed muffler baffles. This modification does make the motorcycle's exhaust note more aggressive, somewhat resembling the roar of a race bike. However, simply pulling out the baffles damages the exhaust structure, disrupting the carefully engineered backpressure. You'll immediately notice the bike feels sluggish at low RPMs. It also leads to excessive heat buildup at the exhaust outlet, which can melt or warp rear plastic components. During my last track session, I reinstalled them after just ten minutes - the noise was so loud it left my ears ringing. On public roads, you risk getting ticketed for illegal modifications. For genuine sound improvement, I recommend investing in a full aftermarket exhaust system from reputable brands that properly balance backpressure and noise control.
