S&S 475C Chain Drive Camshaft Kit for 2017-Up M8 Models - 330-0641

S&S supplies the required bearing, o-rings, and hardware with the 475C cam kit; verify every listed piece before disassembly.

S&S identifies the 475C as a bolt-in cam compatible with stock valvetrain components; inspect the existing components and follow every current clearance and condition check before reuse.

Use S&S Instruction 510-0467 together with the service information for the exact motorcycle for exhaust, floorboard, pushrod, oil-pump, cam-chest, and final reassembly procedures.

Verify sprocket alignment within 0.009 inch and follow the exact VVT or non-VVT torque path, including the specified sprocket, tensioner, cam-cover, cam-plate, and oil-pump values.

Remove and reinstall the stock pushrods through the Harley-Davidson service procedure, or use S&S Quickee Adjustable Pushrods 930-0123 when the stock pushrods are cut to avoid top-end disassembly.

When it applies: Add 930-0123 only when the installation method replaces the stock pushrods; do not cut pushrods unless the exact safety procedure is followed.

Confirm the calibration and final checks required for the exact cam, displacement, intake, exhaust, and motorcycle.

When it applies: Calibration needs depend on the complete engine and airflow configuration.

Have AVT or a qualified engine builder complete the job when the required tools, measurements, calibration, or engine-building knowledge are not available.

When it applies: Recommended whenever the installer cannot positively verify every required clearance, procedure, and torque value.

S&S recommends replacing the tappets when the cam is replaced and identifies Precision Tappets 330-0718 for the 475C application.

Use assembly lubricant on the bearings, cam lobes, bushings, thrust surfaces, o-rings, chain, and tensioner shoe; use red or blue threadlocker only on the exact fasteners specified by S&S.

Have Harley-Davidson sprocket locking tool 42314 and cam-bearing removal/installation tool 42325-4 or exact equivalents before opening the cam chest.

Use S&S cam-phaser tool 530-0072 to hold the phaser assembly during the VVT cam-chest procedure.

When it applies: Required only for a Variable Valve Timing M8 application covered by the current instructions.

Use calibrated inch-pound and foot-pound torque capability plus a straightedge, feeler gauge, and caliper for bearing depth, sprocket alignment, and fastener torque checks.