How many camshafts does a Harley Davidson Sportster have?
For Harley V-Twin engines, which have four valves (two per cylinder), there are four cam lobes: two intakes and two exhausts. The Sportster engine has four camshafts, each with one lobe, while the Twin Cam engine has two camshafts with two lobes each.
Where is the camshaft located on a Harley V-twin?
In contrast, all other previously mentioned Harley V-Twin engines are pushrod engines where the camshaft (s) is placed near the crankcase area, which is below the valves and cylinder head. Pushrod engines include a valvetrain, consisting of tappet (also called lifter), pushrod, and rocker arm, to transmit camshaft lobe action to each valve.
What are the specs for a camshaft part?
CAMSHAFT SPECIFICATIONS Part No. Specs @ 0.50 Cam Lift Opens Closes Duration SAE Specs@ (0.06/Rocker Arm Ratio) Cam Lift Opens Closes Duration Cam Lift Gross Valve Lift Center Line C/L Rocker Arm Ratio Valve Lash Clearance
What is the lobe centerline on a camshaft?
Lobe Centerline. Cam lobe centerline is another factor in camshaft design. The lobe centerline is an imaginary line that simultaneously passes through the point of maximum lift on the lobe’s nose (tip) and the camshaft’s center of rotation (axis).
How many CAMS does a Harley Davidson Sportster have?
A unique feature of Harley-Davidson ‘s ‘Sportster’ engines since their introduction in 1957, is their use of four separate camshafts, all geared together. This is quite a contrast to a classic American car V8, which has a single camshaft.
Where are the cams located on a Harley Davidson Evolution?
Unlike almost any other engine in production today, the Sportster Evolution uses one cam per engine overhead valve, resulting in four individual, single-lobe, gear-driven camshafts. The cam lobes are thus all located one behind another, and pushrods are arrayed in pairs (front and rear) parallel to the cylinder axis as a result.
What kind of engine does a Sportster Evolution have?
Evolution on the Sportster. Above, a color-coded approximate diagram of the Sportster Evolution valve train superimposed over an image of a Sportster Evolution. Crank output is purple; cams are red; pushrod/lifters are yellow; rockers are blue; valves are dark green, with seats shown in light green.
How big is the roller follower on a Harley Davidson Sportster?
The cam followers used in Sportster engines, K models, big twin side valve models, and the side-valve W model series were a slightly shorter version of the followers used in the larger motors, but with the same 0.731-inch (18.6 mm) diameter body and 0.855-inch (21.7 mm) diameter roller follower since 1929.