Road King Stage 2 Kit Part 1

1. Here's the complete Yuill Bros. Stage 2 kit. In the upper left is the MasterTune TTS interface and software CD not including the interface cables. In the middle is the exhaust system with the heat shields on the header pipes. In the upper right is the air cleaner with new backing plate and filter. In the lower right are the gear driven cams with adjustable push rods and cover tubes.

2. To install the gear driven cams, we headed over to Lucky Devil Metal Works where Brad Latham was going to perform the install. Once secured to the lift, Brad removed the seat, disconnected the negative battery cable, gas tank, air cleaner, right floorboard, front exhaust, and both spark plugs (so we can easily turn the engine with the rear wheel).

3. Brad cut out the old pushrods with bolt cutters. If you plan to reuse your push rods, you'll have to remove the rocker boxes and take them out thru the top of the motor. Fortunately, Yuill Bros. included a new set of adjustable push rods.

4. With the cam cover removed, Brad put the transmission into fifth gear, so he ould rotate the rear wheel until the cam timing marks were aligned. Then he inserted a pin (Brad fashioned one from a welding rod) into the hydraulic chain adjuster to hold in the internal spring, piston, and shoe.

5. Next, Brad removed the retaining bolt from the crankshaft sprocket and the rear camshaft sprocket and slid them off. He set aside the retaining ring and washer on the front cam shaft to be used on the new front cam.

6. Brad removed the lifter covers followed by the lifters and then removed the cam support plate. The oil pump retaining bolts were loosened to permit correct oil pump rotor alignment when the cam support plate was reinstalled.

7. Brad inserted another pin into the inner hydraulic chain adjuster then removed it. Since the geared cams don't use chain lubricators, the installation kit includes two oil port (yellow arrow) covers, which Brad installed.

8. Brad pressed the drive gears onto each camshaft with the drive keys in place making sure that correct gear was pressed onto its corresponding camshaft (front to front, etc.) and that they were oriented per the instructions (gear shoulders facing the cam support plate).

9. Here is a comparison of the stock chain driven cams (left) with the new Yuill Bros. gear driven cams (right). Note the differences in the rise and width of the cam lobes.

10. Brad aligned the timing marks on the cam gears and inserted the cams into the cam support plate. Here Brad checked for backlash in the cam gears. The cams should roll freely with no binding. However, some backlash must be present. Too little and the gears may bind, too much and the gears will be noisy. Ours were in the recommended range.

11. Brad then followed the poper sequence for reinstalling the cams/support plate. With the cams installed, Brad checked for end play and backlash. Similar to the cam gears, these gears must have some play.

12. Next, Brad inserted the four lifters and properly adjusted the new adjustable push rods.