Rivera Primo Chain Drive User Manual

RIVERA ENGINEERING’S

CHAIN DRIVE INSTALLATION INSTRUCTIONS

PLEASE NOTE: primary chain, compensating
sprocket, clutch basket group, & chain tension­er must be installed simultaneously as a com­plete assembly.

1) Assemble & install the chain tensioner assembly over
the primary chain as shown in figure 1.

2) Install the compensator sprocket with extender & spacer
(numbers 5, 6, & 7, FIG 2)(#7 is not included in this kit),
primary chain, chain tensioner, and clutch basket simulta­neously onto the motor drive shaft & transmission main
shaft. Rotate the chain drive slightly as needed to allow the splines to line-up.

3) Install the chain tensioner nut loosely on the chain tensioner bolt.

4) Install the sliding cam onto the compensator sprock­et, & slide the compensating sprocket cover-assembly
(#3) over the cam.

5) Apply 2 drops of Rivera "Red" thread-lock on the
threads of the motor drive shaft, & install the motor
nut loosely with the fingers at this time.

The hex spacer (#7) and spacer (#2) as seen in fig.2 are not provided
in Rivera Engineering’s chain drive kit. These components are
required with some applications, and can be purchased from your
local Harley-Davidson dealer.

FIG 2

6) Apply 2 drops of Rivera "red" thread-lock on the threads of the

transmission main-shaft and loosely install the clutch hub nut
(left hand threads).

7) Place the HD "Primary Drive Locking Tool" HD-41214 on the

primary chain as shown in figure XXX and tighten the motor
sprocket nut to 150-165 foot-pounds.

8)Turn the locking tool 180 degrees and move it to the clutch
sprocket. Tighten the clutch hub nut to 70-80 foot pounds (left­hand thread). Adjust chain tension so that the top strand has 5/8”­to-7/8” of up and down play (cold drive train). Tighten the center
bolt nut to 21-29 foot pounds of torque.

9) Install the clutch plates, steel first then fiber, alternat-

ing until all are installed. The last plate in should be a
steel plate.

10) Install the pressure plate, diaphragm clutch spring,

spring retainer, lock-clips, & four shouldered nuts.

11) Tighten the shoulder nuts until they bottom, and no tighter. Bend the locking tabs up against the nuts.

12) Adjust the clutch by loosening the cable adjuster until there is a large amount of play in the cable. Install

the clutch adjustment screw and lock nut into the pressure plate. Turn the screw taking up all free play in
the the push rod. Turn clockwise unitl lightly seated. Back out the adjusting screw (counterclockwise) 1/2­to-1 full turn. Tighten the locknut while holding the adjuster screw with an allen wrench. Squeeze the
clutch handle to it’s maximum limit 3 times to set the ball and ramp mechanism. Turn the cable adjuster
taking the slack out until there is 1/16”-to-1/8” of free play between the cable ferrule and the clutch lever
bracket.

13) Install the outer primary case, derby cover, & inspection cover.

14) Fill the chaincase with the required amount of chaincase lubricant.

RIVERA ENGINEERING 12450 Whittier Blvd, Whittier, CA 90602

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