Rivera Primo Chain Drive - Manual (Page 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 (left-
hand 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) 1/2-
to-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
(562) 907-2600 FAX (562) 907-2606 Visit www.riveraengineering.com