
Parts List
1
2
3
4
5
6
7
8
9
10
11
ITEM NO.
NOTES:
P/N 270-12634 Hub Kit, includes part numbers 230-9752, 270-12580 and 300-12581
P/N 230-12447 Bolt Kit, Rotor, includes part numbers 230-6739, 240-10191, and 300-12739
Page 3
• Installation of this kit should ONLY be performed by individuals experienced in the installation and proper operation of disc brake
systems. Prior to any attempt to install this kit, please check the following to ensure a trouble free installation.
• Inspect the contents of this kit against the parts list to ensure that all components and hardware are included.
• Make sure this is the correct kit to fit your axle. This kit is designed for direct bolt-on installation to standard inboard midget sidebell
with 3.50” mount centers and 2.50” x 38 spline axle.
Disassembly (if applicable)
• Disassemble the existing rear brakes. Raise the rear wheels off the ground and support the rear suspension per applicable racing
guidelines.
• Clean, de-grease the stock axle and/or bell while removing any nicks or burrs.
Assembly Instructions (numbers in parenthesis refer to the parts list/diagram on the preceding pages): CAUTION: All mounting bolts
must fully engage threaded holes.
•With the T-notches of the rotor adapter (2) facing away from the rotor (3), attach adapter to rotor using bolts (4), washers (5) and t-nuts
(6) as shown in Figure 1. Apply red Loctite
®
271 to the threads before installing. Finger tighten. After all t-nuts have been
installed, torque bolts in an alternating sequence to 120 in-lbs. Please refer to Wilwood’s data sheet DS-669 (available at
www.wilwood.com/Pdf/DataSheets/ds669.pdf
) for complete t-nut bolt kit installation instructions.
•NOTE: When cross-drilled bolts are supplied with the rotor bolt kits, the additional step of
safety wiring bolts is recommended. Safety wire bolts using standard 0.032 inch diameter
stainless steel safety wire as shown in figure 2. Refer to Wilwood’s data sheet DS-386
(available at
www.wilwood.com/Pdf/DataSheets/ds386.pdf
) for complete safety wire
installation instructions.
•Orient the axle clamp assembly (7, 8 and 9, pre-assembled) as shown in Figure 1 and install
onto the rotor adapter (2) using nuts (10). Tighten nuts part way while still allowing clamp-
to-rotor movement. The nuts will be torqued later, after aligning the rotor. NOTE: The axle
clamp should be positioned inside of the rotor as shown in Figure 1, not offset, or outside of
the rotor adapter.
•Slide the rotor/adapter assembly onto the axle and into approximate position near the
mounting bell.
General Information, Disassembly, and Assembly Instructions
120-5081
300-9366
160-3455
230-6739
230-10191
300-12739
270-10755
230-9621
230-5525
230-9618
15B-9836
Caliper, Billet Dynalite, Side Inlet
Adapter, Rotor, Floating Mount
Rotor, 0.35” Thick x 10.50” Diameter, 6 x 5.50” Bolt Circle
Bolt, 5/16-24 x .812 Long, 12 Point
Washer, .328 I.D. x .562 O.D. x .063 Thick
T-Nut, 5/16-24
Clamp
Stud, 1/4-28 x 1/4-20 x 1.00 Long (pre-installed)
Bolt, 1/4-20 x .75 Long
Nut, 1/4-28, Self-Lock
Brake Pad, 7812, PolyMatrix B Compound
PART NO.
DESCRIPTION
1
1
1
6
6
6
1
8
2
8
2
QTY
BEGIN BY SLIDING THE 0.032"
DIAMETER WIRE THROUGH TWO OF
THE HOLES (LEFT) THAT ARE 180°
APART. TWIST THE WIRE AS
SHOWN (BELOW) USING SAFETY
WIRE PLIERS. NOW SLIDE ONE
WIRE THROUGH TWO OF THE
HOLES (180° APART) AND WRAP THE
OTHER WIRE AROUND THE BOLT.
TWIST THE WIRES TOGETHER TO
FORM A PIGTAIL. SEE DS-386 FOR
COMPLETE DETAILS.
Figure 2. Safety Wire Diagram