BMI Racing Double Wishbone Front End - Manual

Front Suspension Assembly
Locate your lower front suspension arms, flex
plates,4 pivot ball housings with balls installed, and
14 2-56 x 3/16 button head screws. Note that the
arms are symmetrical. At this time you must pick
which one will become the left and right arms as
this will determine how you insert the housings into
the arms.
There are 2 types of pivots. 4 of them use 2 screws
to mount and 2 use 1 screw to mount. The 1 hole
mount pivots go on the steering block end of the
arm. Insert into arms as shown and install screws.
The flex plates mount to the underside of the arm
as do the outer pivots. The other 4 pivots mount
from the top of the arm.
Special Note: Do not over tighten the 2-56 screws.
Over tightening may pinch the pivot ball.
This is how everything mounts to the arms. Please
check the direction of the pivots to insure proper
mounting. Once mounted, install 1 4-40x5/16
setscrew into each flex plate using the inward
hole(stiff position). Also install 1 4-40x5/15
setscrew into each arm. This will be used as a
droop screw. It is the hole located middle of the
arm by the rear pivot.
Step 1
Step 2
Install a 4-40 x 5/8 set screw through
the steering spindle so that the same
amount is protruding from each end of
the spindle
Mount arms to sub plates using 2 4-40x1/4 inch
screws. They screw into the pivot balls. Note the
direction of the sub plate. This is with the
countersinks in the plate facing down.
Step 3
Step 4
Step 5
Cut ball cups for damper tube to .400-.425 long.
After they are cut to size using a sharp exacto
knife, screw a 4-40 x 5/16 setscrew into each one.
Screw them in until they bottom out but do no over
tighten. Now screw 1 into the piston and one into
the body until they bottom out but again, do not
over tighten. Coat the piston with 15,000 weight
differential oil or #4 shurlube and then slowly install
piston into body. I like to spin the tube as it is
installed.