1986 Evo Motor Diagram. Related documentation cautionary note regarding servicing. Evolution in the big twin bikes since its inception in 1986 the sportster evo engine design has remained relatively untouched.
Harley evolution valvetrain with diagram. It also contains circuit diagrams which describe the various types of wiring for each system as well as information on individual component installations. Sportster technical menu.
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The sportster evolution engine has remained largely unchanged from 1986 to the present day though changes to the transmission final drive and motor mounts have necessitated changes to the sportster evolution case. Evo oiling system harley riders usa forums inside harley. Performance gallery horsepower gallery evolution 80 shovelhead sportster twin. Engine performance how to build a tc96 2007 engines tc88 70hp stage1 tc95 128hp stage 3 tc95 100hp street tc96 2007 stage 12 evo 64 hp stage 1 evo 74 hp stage 2 evo 82 hp stage 3 evo 95 hp stage 3 883 to 1200 upgrade shovelhead modifications new efi for evo and tc.