HOME 31. If cam timing is correct, install spark plugs, install cam covers and front engine mount according to the instructions in the following procedure. See 1.25 VALVE LASH, Lash Measurement . sm00956 32. If valve lash must be adjusted, verify cam timing before disassembly. See 1.25 VALVE LASH, Verify Cam Timing . sm01744 Figure 1-74. Camground Camshaft Lobes Figure 1-73. Measuring Valve Lash Figure 1-75. Micro-Stoned Camshaft Lobes Camshaft Spalling (typical) Camshaft spalling can occur on either the heal, toe or ramp of the camshaft lobe. If within the following guidelines, the spalling is considered within specification. 1. See Figure 1-76 .
This figure shows camshaft spalling within acceptable specification on the toe of the camshaft lobe. 2. See Figure 1-77 . This camshaft shows spalling on the camshaft heel at an unacceptable level as the spalling extends across the entire camshaft lobe. 1-54 2009 VRSC Service: Maintenance CAMSHAFT INSPECTION During the process of adjusting valve lash, be sure to inspect camshafts for wear.The following details different types of cam manufacturing and wear to be considered during inspection VRSC camshafts. NOTE It is not necessary to remove camshafts for this inspection. Camshafts are removed for photo-clarity.
Lobe Surface Finish There are two styles of surface finish found on VRSC cam- shafts. The first is called camground which can be seen in Figure 1-74.This lobe appears very smooth.The second finish is called micro-stoned which can be seen in Figure 1-75. This lobe will have horizontal finish marks on the lobes from the finishing stone used in the manufacturing process. Both are acceptable finishes on VRSC camshaft lobes. sm00957