HOME 22. Remove spark plugs. See 1.22 SPARK PLUGS AND COIL . sm01742 NOTE Spark plugs are only removed to allow the engine to be rotated easily. Spark plugs should be re-installed and torqued immedi- ately after lash is set and before assembly begins. 23. Remove alternator derby cover to access 36 mm rotor nut. Rotate engine toward front cylinder only. Do not rotate engine toward rear cylinder, as engine damage can result. (00409c) 24. Using CRANKSHAFT ROTATING WRENCH (Part No. HD- 45314) rotate the engine toward front cylinder (direction of operation) until nose of camshaft intake and exhaust are at the 2 o'clock and 10 o'clock position as shown in Figure 1-71 . Figure 1-72.
Rear Cylinder Cam Lobe Position a. When adjusting the front cylinder the cam lobes will be at the base circle position on the tappet as shown. 25. See Figure 1-73 . Use blade style metric feeler gauges to measure the gap (lash) between the cam and tappet. NOTES • An ANGLE BLADE FEELER GAUGE SET (Part No. HD- 47181) is available and may increase the reliability of the readings. b. When adjusting the rear cylinder the cam lobes will be at the base circle position on the tappet as shown in Figure 1-72 . • A valve lash calculation worksheet is provided in 1.22 SPARK PLUGS AND COIL to record the valve lash Figure 1-70. Front Cylinder Cam Lobe Position 27.
Gage the lash for exhaust and intake valves and record selected blade thickness in the "Initial Lash Measurement" column of the valve lash calculation worksheet. sm01741 data. Use this sheet to determine the correct shim selec- tion. Incorrect lash adjustment can cause serious engine damage. 26. See 1.22 SPARK PLUGS AND COIL and copy worksheet for use in this procedure. Table 1-12. Valve Lash Specifications Intake Max Min Exhaust Max Min MM IN. Max Min 0.245 0.0096 0.195 0.0078 Max Min 0.345 0.0135 0.295 0.0117 sm01742 28. Repeat valve lash measurements on other cylinder head and record initial lash measurements. 29.
Compare measurements to "Valve Lash Upper Limit" column and "Valve Lash Lower Limit" column. A valve requires lash adjustment if: a. Measurement is larger than "Valve Lash Upper Limit." b. Measurement is smaller than "Valve Lash Lower Limit." NOTE If cam caps are removed, install and finger tighten before applying torque. 30. If all valves are within specification, verify cam timing Figure 1-71. Rear Cylinder Cam Lobe Position before reassembly. See 1.25 VALVE LASH, Verify Cam Timing. 2009 VRSC Service: Maintenance 1-53 NOTE If cam caps are removed, install applying torque. 30. If all valves are within specifi Cylinder Cam Lobe Position before reassembly. See 1.25 V Timing.
2009 VRSC Ser Figure 1-71. Rear vice: Maintenance 1-53