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Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...
A 4-2-1 exhaust system is a type of exhaust manifold for an engine with four cylinders per bank, such as an inline-four engine or a V8 engine. The layout of a 4-2-1 system is as follows: four pipes (primary) come off the cylinder head , and merge into two pipes (secondary), which in turn finally link up to form one collector pipe.
The exhaust then splits into two separate sections of piping, exiting through two 3.75 in (95 mm) stainless steel tips at the rear of the vehicle. The exhaust system is unique in that there is no muffler, instead relying on the turbocharger and resonators to reduce the exhaust volume. The result is a very distinctive and audible exhaust note. [21]
Inertial supercharging effect is the result of incoming fuel/air charge developing momentum greater than intake stroke would generate alone. It is achieved by the careful design of the shape of the piston head, the valves and cam profile/valve timing which creates a vacuum that pulls more exhaust gases (and some of the intake gasses) out of the engine.
Period reviews claim that the 1994-95 ZX-9R is a less sharp, more stable and comfortable alternative to the Honda Fireblade, with increased straight-line speed. A prepped B1 model as reviewed in the May 1994 issue of Cycle World magazine sprinted to a 10.65 second 131.38 MPH 1/4 mile, a top speed of 166 MPH.
The Sennheiser PXC 550-II is one of the highest-scoring headphones in our ratings, with superb sound quality and noise canceling. The PXC 550-II is as much as $300 cheaper than many competitors.
All variations have an air/oil-cooled oilhead flat twin (or boxer) 1,170 cc (71 cu in) engine, which has the inlet manifold at the rear of the cylinders and the exhaust at the front. As of 2017 there are five R nineT variations: R nineT - with upside-down (USD) telescopic forks; R nineT Pure - styled back roadster design
Kawasaki swapped the traditional 4-4 exhaust (available on Z1 and KZ900) for the 4-2 Jardine exhaust (which came standard on the KZ900B) on the LTD and quiet and restrictive muffler on the 1000 A1 and A2 as shown in the top photo in this article. The KZ1000 came with either a chain drive or shaft drive in 1979 and 1980 named ST and SHAFT ...