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  2. Harley-Davidson Milwaukee-Eight engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Milwaukee...

    The exhaust and intake flow capacity is increased by 50 percent over the Twin Cam models. Although weighing the same as its predecessor, both models of the Milwaukee-Eight increase in acceleration by 10% (0-60 for the 107 vs the 103) and 8% (0-60 for the 114 vs. the 110).

  3. Expansion chamber - Wikipedia

    en.wikipedia.org/wiki/Expansion_chamber

    When the descending piston first exposes the exhaust port on the cylinder wall, the exhaust flows out powerfully due to its pressure (without assistance from the expansion chamber) so the diameter/area over the length of the first portion of the pipe is constant or near constant with a divergence of 0 to 2 degrees which preserves wave energy ...

  4. Muffler - Wikipedia

    en.wikipedia.org/wiki/Muffler

    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 ...

  5. Harley-Davidson Twin Cam engine - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_Twin_Cam...

    Harley-Davidson Twin Cam engine at the Harley-Davidson Museum. The Harley-Davidson Twin Cam are motorcycle engines made by Harley-Davidson from 1998 to 2017. Although these engines differed significantly from the Evolution engine, which in turn was derived from the series of single camshaft, overhead valve motors that were first released in 1936, they share a number of characteristics with ...

  6. Tuned exhaust - Wikipedia

    en.wikipedia.org/wiki/Tuned_exhaust

    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. [2] Compared with a 4-1 exhaust system, a 4-2-1 often produces more power at mid-range engine speeds (RPM), while a 4-1 exhaust produces more power at high RPM.

  7. Harley-Davidson FL - Wikipedia

    en.wikipedia.org/wiki/Harley-Davidson_FL

    The V2 engine introduced in 1948, colloquially called Panhead, was available as E, EL, F, FL depending on size and compression 2019 Harley Davidson FLHT. Harley-Davidson FL is a model designation used for Harley-Davidson motorcycles since 1941, when F referred to the new large capacity 74 cui (1200cc) variant of the V-2 Overhead valve engine (″Knucklehead″) that was introduced in 1936 as ...