BMI Racing Copperhead 12 - Manual (Page 4)

Step 6
Attach the upper
suspension arm assembly
to the lower suspension
arms as shown with 4-40 x
½” screws.
Locate the left and right steering spindles. Trim the
steering arms length to the line molded on the part as
shown.
Step 7
Step 8
Locate the titanium front axles, four 4-40 alloy lock
nuts, and two alloy pivot balls.
Thread the titanium axles into the steering
spindles. Note that the threads on the axles that
go into the spindles are left hand. After the axles
are fully seated tighten an alloy 4-40 lock nut onto
the threaded stub coming out the back of the
spindle.
Thread the alloy pivot balls into the holes on the
steering arms and secure them with alloy 4-40 lock
nuts. Remember these are alloy pivot balls so
make the nuts snug. They are strong enough to
last a few racing seasons; but if you crank them
down, you can snap them.
Step 9
1. Snap an e-clip on to one end of the king pin.
2. Slide 3 shims onto the king pins against the
e-clip.
3. Pass this through the pivot ball in the upper
suspension arms rod end.
4. Place one more shim on the king pin.
5. Slide the steering spindle onto the king pin.
6. Slide the king pin through the pivot ball in the
lower suspension arm.
1. Slide the .020” spring and nylon retainer
onto the king pin and snap an e-clip on the
bottom of the king pin.
2. Repeat for the other side of the front
suspension.
Locate 2 steel 1/8” king pins,10 1/8” shims, 4 e-
clips and 2 .020” springs.
Special notes:
Make sure the steering arms on the spindle
are pointing towards the rear of the car as
shown in the picture.
The axle is offset in the spindle.
Make sure the axle is closest to the lower
suspension arm. As shown in the picture to
the left
It is important that the king pin slide
freely in all of the parts including the
steering spindle. When you thread the axle
into the spindle, it may swell the king pin
bore and make it tight on the spindle. You
can try to use a 1/8” drill to open it up but
the best solution is to use a 1/8” reamer.
You can order the reamer from:
www.mcmaster.com . The part number is
2995A61