Rivera Primo Slimline Belt Drive - Manual (Page 5)

5
If the diaphragm spring adjustment requires additional small
amount of spring compression, this can be accomplished by
using one or more of the special .020” washers on each of the
shouldered nuts. (photo A)
If the diaphragm spring adjustment requires less spring
compression, this can be accomplished by using one or
more of the .030” washers on the clutch hub studs nuts
as pictured, reducing spring compression
P hoto C shows a diaphragm spring that is compressed too far, & needs
adjustment. Correct adjustment will require that special adjustment
washers be added to the clutch hub studs as shown in photo B.
This is a diaphragm spring correctly adjusted. Daylight is showing
at either edge, because the spring is within .010” of being flat!
(slightly bowed outward) as seen in photo D.
PHOTO A PHOTO B
PHOTO C PHOTO D
AS DELIVERED, THE PRO-CLUTCH TM CLUTCH PACK REQUIRES NO ADJUSTMENT, THE CLUTCH PACK HAVING BEEN SET AT THE FACTORY. AFTER THE PRO-CLUTCH TM HAS
ACCUMULATED SIGNIFICANT MILEAGE IT MAY REQUIRE SOME ADJUSTMENT DUE TO NORMAL WEAR. USE THE PROCEDURES OUTLINED BELOW IF & WHEN ADJUSTMENT
IS REQUIRED.
FOR BEST ALL AROUND PERFORMANCE THE DIPHRAGM SPRING SHOULD BE COMPRESSED TO WITHIN .010” OF BEING FLAT WHEN THE SHOULDERED SPRING RETAINER
NUTS HAVE BEEN PROPERLY TIGHTENED (BOTTOMED) ! THIS PROVIDES BEST LEVER ACTION AT THE HANDLEBAR AS WELL AS NORMAL SPRING PRESSURE TO THE
CLUTCH PACK. SLIGHTLY MORE CLUTCH PRESSURE CAN BE GAINED WITH THE DIAPHRAGM SPRING WITH .030” OF SPRING HEIGHT (OUTWARD BOW), BUT THIS
INCREASES SLIGHTLY THE HAND EFFORT NEEDED FOR THE CLUTCH. THIS SPRING CONFIGURATION CAN BE OBTAINED BY PLACING A SMALL DIAMETER WASHER ON EACH
OF THE CLUTCH HUB STUDS, AS SHOWN IN “PHOTO B”.
THREE CLUTCH SPRING LENGTHS ARE AVAILABLE: A STOCK EQUIVALENT SPRING (BLACK IN COLOR), A MEDIUM SPRING FOR STREET PERFORMANCE APPLICATIONS
(SILVER IN COLOR) & A COMPETITION SPRING (GOLD IN COLOR) RECOMMENDED FOR DRAG RACE ONLY APPLICATIONS
The diaphragm spring will be compressed to within .010”-to-.020” of flat when correctly installed & adjusted
PRO-CLUTCH
TM
ADJUSTMENT
WRONG RIGHT
CLUTCH CABLE ADJUSTMENT
1. TURN THE CENTER CLUTCH ADJUSTING SCREW OUT AWAY FROM CONTACTING THE MAINSHAFT PUSHROD.
2. LOOSEN THE CLUTCH CABLE ADJUSTER AND BACK OUT THE CABLE ADJUSTMENT UNTIL THE CLUTCH LEVER IS RESTING AGAINST THE HANDLEBAR GRIP.
3. TURN THE CENTER ADJUSTING SCREW IN UNTIL THE CLUTCH HANDLEBAR LEVER STARTS TO MOVE AWAY FROM THE HANDLEBAR GRIP.
4. NOW BACK-OFF THE ADJUSTING SCREW 1/4 OF A TURN AND RE-TIGHTEN THE ADJUSTING SCREW LOCK NUT.
5. ADJUST THE CLUTCH CABLE TO APPROXIMATELY 1/8” FREE PLAY FROM THE CABLE FERRULE TO THE CLUTCH PERCH IF USING A BLACK VINYL CABLE.
IF USING A BRAIDED CABLE YOU WILL HAVE VERY LITTLE FREE PLAY, IF ANY, AT ALL.