Rivera Primo Common Plenum Dual 42mm Mikuni Carburetor Kit (DMK) - Manual (Page 9)

FLOAT LEVEL ADJUSTMENTS
The fuel level of the carburetors will probably
never need adjusting; however, if a problem has
been diagnosed as a fuel level that is too high or
too low, adjustment can be done as shown.
A. Invert the carburetor and remove the float
bowl.
B. The float assembly's actuator tab should just
begin contact with the Needle Valve assembly
when the bottom of the float is 18mm from the
carburetor bottom surface as shown.
C. If adjustment is required, adjust by bending
the actuator tab.
Before replacing the float bowl, check the condi-
tion of the float bowl O-ring. If it is worn or does
not fit in the groove correctly it should be
replaced. Refer to the External View illustration
for float bowl screw torque.
DUAL DUAL CARB INST CARB INST ALLA ALLA TION TION
16
NOTE
12532 Lambert Road, Whittier, CA 90606 (562) 907-2600
DISASSEMBLY
1. Remove the air cleaner assembly by removing the
chrome outer cover and the air filter element.
2. Remove the two socket headed alignment screws.
Remove the air cleaner backing plate by removing the cen-
ter bolt after loosening the choke cable bracket nut.
ASSEMBLY
1. Install the velocity stack backing plate in the same loca-
tion as the air cleaner backing plate and secure it by re-
installing the two socket head screws and the center
mounting bolt (use blue Loctite to secure the socket head
screws). Re-attach the choke cable to the center mounting
bolt with the original nut and washers.
NOTE: If the velocity stack backing plate does fit easily in
place on the carburetors it may be necessary to remove
some casting flash. The flashing occurs at the 6 o'clock
and 12 o'clock positions on the carburetor intakes. A flat
file can easily smooth out this area.
CAUTION: AFTER SECURING THE VELOCITY STACK PLATE CHECK
THROTTLE OPERATION FOR ANY SIGNS OF BINDING. IF THE CAR-
BURETORS DO NOT OPEN & CLOSE EASILY, LOOSEN THE
SCREWS, RE-ALIGN THE CARBURETORS & RETIGHTEN THE
SCREWS.
2. Attach the velocity stacks to the mounting bracket with
the 4 bolts from this kit. Once again, use the blue Loctite
to secure the bolts against vibration.
Flashing