Rivera Primo SU Sportster KIT 1041-0064 - Manual (Page 5)

Place the lower carb support (1042-0231) on top of lifter
block inside bolt hole on each lifter block.
Hand thread each bolt into the lifter base holes to make
sure that you have good thread retention.
Apply a drop of blue thread locker to each bolt (use the
OE bolt).
Prepare to install the lower carb support (1042-0231).
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