Editing V-twin engine (section)

===Transverse engine===
The most common arrangement is to mount the engine with the crankshaft oriented transversely to the frame. The advantage of this mounting is that the width of the motorcycle can be smaller than a longitudinally-mounted V-twin.<ref name="MDTCocco117">{{cite book| last = Cocco| first = Gaetano| title = Motorcycle Design and Technology| url = https://books.google.com/books?id=Ydk0bgq2_3YC| access-date = 2013-05-28| year = 2004| publisher = MotorBooks International| location= St. Paul, MN US| isbn = 0-7603-1990-1| page = 117| chapter = Chapter 11 The Engine| chapter-url = https://books.google.com/books?id=Ydk0bgq2_3YC&pg=PA113| quote = In some construction layouts the transverse width is the same as a single-cylinder engine, which allows very narrow frames and bodywork with small frontal areas.| ref = MDTCocco| url-status = live| archive-url = https://web.archive.org/web/20150205231651/http://books.google.com.jm/books?id=Ydk0bgq2_3YC&source=gbs_navlinks_s| archive-date = 2015-02-05}}</ref> A disadvantage of this configuration for air-cooled engines is that the two cylinders receive different air-flows and cooling of the rear cylinder tends to be restricted<ref name="CWMay2005Service160">{{cite journal | last1 =Dean | first1 =Paul | editor-last =Edwards | editor-first =David | date =May 2005 | title =Service: Oil miser | journal =[[Cycle World]] | volume =44 | issue =5 | page =160 | location =[[Newport Beach, California|Newport Beach]], CA US | publisher =Hachette Filipacchi Media | issn =0011-4286 | access-date =2013-05-26 | url =https://books.google.com/books?id=E86bEyC7DzoC&q=V-twin+%22rear+cylinder%22+cooling&pg=RA5-PA60 | quote =An air-cooled big-bore V-twin in particular can get very hot, especially the rear cylinder, which is not exposed to as much cooling air as the front. | url-status =live | archive-url =https://web.archive.org/web/20140415094643/http://books.google.com.jm/books?id=E86bEyC7DzoC&pg=RA5-PA60&dq=V-twin+%22rear+cylinder%22+cooling&hl=en&sa=X&ei=GlKiUY6UN43S9gSkoYCgBg&ved=0CCoQ6AEwADgo#v=onepage&q=V-twin%20%22rear%20cylinder%22%20cooling&f=false | archive-date =2014-04-15 }}</ref> (although the uneven cooling isn't as pronounced as a parallel-twin engine, where the inner faces of the cylinders are not exposed to any airflow). Some transverse V-twins use a single carburettor in the middle of the V-angle to feed both cylinders. While this avoids the need for two carburettors, it creates further cooling problems for the rear cylinder by placing its hot exhaust port and pipe at the back of the cylinder, where it may be exposed to less cooling airflow.

Transverse V-twin engines have been used by [[Harley-Davidson]], [[Ducati]] and many recent Japanese motorcycles, such as the [[Suzuki SV650]]. Some Ducati V-twin engines have been marketed as "L-twin" engines, due to the front cylinder being vertical and the rear cylinder being horizontal, thus forming an "L" shape.

<gallery mode="packed" ;="" heights="150px">
File:Princeps V-Twin Motorcycle 1902.jpg |1902 Princeps V-Twin {{nobr|(air-cooled)}}
File:Sokol 995 cc zijklep v-twin.jpg |1933–1939 [[Sokół 1000]] {{nobr|(air-cooled)}}
File:Ducati Monster 620 Dark.jpg|2002 [[Ducati Monster|Ducati Monster 620]] {{nobr|(air-cooled)}}
File:Honda VTR250 2009 Engine Radiator.JPG|2009 [[Honda VTR250]] {{nobr|(water-cooled)}}
</gallery>
{{clear right}}