Repair manual

Engine Mechanicals
8
Cam Lobe Contour
There are two cam lobe contours per valve on each cam
element.
The small cam lobes (shown in green) implement a
valve opening stroke of 0.25 in (6.35 mm). The length
of opening is 180° crankshaft angle. The exhaust valve
closes 2° after TDC.
The full stroke provided by the large cam lobes (shown in
red) is 0.40 in (10 mm) with a length of opening of 215°
crankshaft angle. The exhaust valve closes 8° before TDC.
Method of Operation
Large Cam Lobes
(high engine speeds)
Small Cam Lobes
(low engine speeds)