HOME 1.26 SECONDARY CAM CHAIN GENERAL On high mileage engines with good oil pressure, if there is a noise at start-up which goes away, check secondary cam chain wear. Before beginning procedure, note if the rattle is heard during engine start-up. sm01760 ADJUSTMENT TOOL NAME PART NUMBER CRANKSHAFT ROTATING WRENCH HD-45314 SECONDARY CAM CHAIN MEASURE- MENT TOOL HD-45334 1. Support engine with a scissors jack under the frame at the fuel tank. 2. Remove the right side cover and maxi-fuse. See 7.4 MAXI- FUSE . 3. Open seat. 4. Remove air box cover. See 1.5 AIR CLEANER AND EXHAUST SYSTEM .
To prevent accidental vehicle start-up, which could cause death or serious injury, disconnect negative (-) battery cable before proceeding. (00048a) Figure 1-96. Positioning Piston 5. Disconnect negative battery cable. 6. Remove air filter top and air filter. See 1.5 AIR CLEANER AND EXHAUST SYSTEM . Never rotate the engine without the secondary cam chain ten- sioner installed. Cam timing could be changed, causing engine damage. NOTE 7. Remove the horn. See 7.27 HORN . 8. Remove the derby cover from the left side crankcase cover. NOTE Do not use the sealing washer from the secondary cam chain tensioner when installing the SECONDARY CAM CHAIN MEASUREMENT TOOL (Part No. HD-45334).
Rotate engine toward front cylinder only. Do not rotate engine toward rear cylinder, as engine damage can result. (00409c) 10. Remove the secondary cam chain tensioner. 11. See Figure 1-97 . install SECONDARY CAM CHAIN MEASUREMENT TOOL. Thread-in the tool until it is seated against the cylinder head. 9. To position the front piston to adjust the secondary cam chain: a. See Figure 1-96 . Install CRANKSHAFT ROTATING WRENCH (Part No. HD-45314). 12. Note the number of grooves showing on the tool. b. Hold the throttle wide open and watch front cylinder intake valve through intake port. 13. Remove the SECONDARY CAM CHAIN MEASUREMENT TOOL. 14.
From the table, select the number of shims necessary for correct secondary cam chain tension. Refer to Table 1-13 . c. Turn crankshaft counterclockwise to open valve fully and then to close the valve. NOTE d. When the front cylinder intake valve is seated, turn crankshaft an additional 1/4 turn (90°) counterclock- wise. If a start-up rattle is present, add 1 or 2 shims to the tensioner. If there is no start-up rattle, do not add shims to the tensioner. 1-62 2009 VRSC Service: Maintenance