Harley Davidson’s Screaming Eagle 120R Racing Engine
Harley debuted its Screaming Eagle 120R (R for ‘Race”) engine nearly two years ago and the the response has been favorable to say the least. Since its release, we’ve seen the establishment of the All Harley Drag Racing Association’s [AHDRA] Draggin’ Bagger [DB] class of racing and a remarkable number of garage enthusiasts building even more remarkable machines off the 120 inch foundation. There’s more than a few reasons why: first and foremost, the MSRP for the 120R is so close to that of a replacement OEM crate motor, most everyone is inclined to upgrade for the slight elevation in cost. Second, Harley’s Screaming Eagle team crammed this particular mill with SE racing goodies throughout, giving it the capability of pushing a reliable 135+ rear wheel horsepower [stats courtesy of HotBike.com]. What Hot Bike and Harley did not include in those stats is the type of exhaust used [It can be assumed they ran a velocity stack coupled to SE's new 58mm throttle body]. Advertising pics of the 2012 SE Dyna Street Bob above depict the bike using a modified SuperTrapp muffler, but HD’s own dyno results refer to using Wegner Automotive ‘s “X-Pipe”, which is a whole different breed from the old 2 int 1 SuperTrapp [more on that in a future post. Either way, it’s good to see Harley introduce a power plant designed to stay ahead of the latest mills from from Victory and Indian. Check out the specs and MSRP at the Harley Davidson Screaming Eagle site.