HOME sm00952 sm04536 1 1 2 3 Figure 3-21.Tappet Compressing Tools (typical) 1. Spacer boss 2. Intake cam lobes 3. Exhaust cam lobes NOTES Figure 3-24. Cam Drive Chain (typical) • Mark or tag chains, front and rear, to match the chains to the front intake and exhaust cam or the rear intake and exhaust cam.The chains are installed with the brass links outboard or on the alternator side. INSPECTION During a normal engine rebuild, camshafts should be replaced, however if engine is low mileage and apart for another reason, be sure to inspect camshafts for wear. The following details different types of cam manufacturing and wear to be considered when inspecting VRSC camshafts.
• The front cylinder cams are identified by the spacer boss location on the outside of the cam sprockets. • See Figure 3-23 . The rear cylinder cams are identified by the spacer boss location on the inside of the cam sprockets. NOTE • Do not attempt to remove camshaft bearing caps without first relieving valve spring pressure using tappet com- pressing tool on front cylinder. It is not necessary to remove camshafts for this inspection. Camshafts are removed for photo-clarity. Lobe Surface Finish 20. Remove cam bearing caps. There are two styles of surface finish found on VRSC cam- shafts. The first is called camground shown in Figure 3-25 . This lobe appears very smooth.
The second finish is called micro-stoned shown in Figure 3-26 . This lobe will have hori- zontal finish marks on the lobes from the finishing stone used in the manufacturing process. Both are acceptable finishes on VRSC camshaft lobes. 21. See Figure 3-24 . Roll chain over cam drive gear. Lift cam and drive gear from head. 22. In this position the rear cams are not preloaded. Remove rear cylinder bearing caps. Disconnect cams from chain. 23. Remove chains. 3-22 2009 VRSC Service: Engine sm00953 Figure 3-22. Remove Secondary Cam Chain Tensioner (typical) Figure 3-23. Rear Cylinder Cams sm00955