Rivera Primo Centri-Force - Chain Drive - Manual (Page 2)

12450 Whittier Blvd. Whittier, California 90602 www.riveraprimoinc.com Tel: 562-907-2600 Fax: 562-907-2606
HYDRAULIC CLUTCH
After the Centri-Force™ clutch is installed, thread in the center adjusting screw till it bottoms out,
then back it out 3 turns and lock down the center adjusting screw jam nut. Initially using the
hydraulic clutch at a dead stop, when you twist the throttle the after pulling in the clutch you will
have a slightly higher engagement the first time. This is due to the auto clutch overcoming the
hydraulic oil in the slave cylinder. After the slave cylinder is retracted, if you are stopped and do
not use the manual clutch, engagement will be instantaneous when you twist the throttle.
ENGAGEMENT ADJUSTMENT
Put a thicker steel plate in place of the thinner one for lower engagement, put a thinner steel
plate in place of the thicker one for higher engagement. Air gap between the pressure plate and
the housing (see fig. 1) should be around .055-.070. Adding wave springs under the 6 flat head
screws will give slightly higher engagement. This is for fine tuning the clutch.
To determine the amount of air gap (see figure 1) push down on the flat head screws and meas-
ure how the travel. If needed, adjust with thick or thin steel plates to change engagement. If you
make the air gap too narrow, then the clutch will drag. You can lower the idle if possible to help
this. If you make air gap too wide, you will have a higher engagement which will require you to
stretch out each gear before you shift.
This is a rpm engaged pressure plate, if you ride the motorcycle in 4th or 5th gear at 25
mph, the clutch will probably slip. You should always be in first gear to take off.
If needed, different thickness steels or extra wave washer springs are available from you local
Rivera Primo dealer or by calling Rivera Primo Inc. directly.
FIGURE 1