BMI Racing DB12RR - Manual (Page 5)

Step 10
Locate four 8-32 x 5/8” screws and 4 nylon lower suspension arm risers.
Pass a screw through the chassis and slide a nylon riser over the screw. Start threading the screw into the
lower suspension arm but do not tighten it. Pass another screw through the chassis and slide a nylon riser over
that screw. Start threading the screw into the other hole on the lower suspension arm. Tighten both screws.
Repeat on the other side.
Special Note:
In testing, we found we preferred to not use any suspension brace, strap or tube to connect the left and right
suspension assemblies. This was true on high traction carpet tracks to low bite asphalt tracks. You can add or
remove lower arm spacers to adjust ride height and to compensate for tire wear.
Locate two flex plates*, 2 Nickel Teflon plated Alloy
pivot balls, 2 delrin pivot ball housings, 2 delrin
housing caps, 2 10-32 set screws* and 4 2-56
button head screws.
1.Place a pivot ball in a pivot ball housing with the
shoulder on the ball facing down.
2.Place a housing cap over the ball.
3.Place the flex plate over this assembly.
4.Pass the 2-56 screws through the pivot ball
housing from the bottom up so they thread into the
flex plate.
5.Thread 10-32 set screw into the large hole on the
flex plate above the housing cap. Just get the 10-32
started into the flex plate for now as we will adjust it
later.
The 10-32 set screw is there to adjust tension on the
pivot ball so it can move freely but have zero play.
*Black flex plates and 10-32 set screws were used
for photos. The production links are natural G10 in
color and the production screws are stainless steel.
Rear suspension assembly
Step 11