OFNA Racing Buggy Pivot Ball Kit User Manual

#31296 Rear Pivot Ball Suspension System, Buggies
( Available For: 1/8 Scale Buggy-Ultra GT LX, Ultra MBX, Worlds, Worlds ll )

ASSEMBLY OF THE REAR HUB

36082
Rear Wheel

31306
12mm
Hex Nut

Axle Shaft

36503
8x16mm
Ball bearings

31304
Rear Hub

5mm
Hex Wrench

36503
8x16mm
Ball bearings

ASSEMBLY OF THE REAR UPPER ROD

For: Ultra GT LX and Ultra MBX,
use 30093and 30092 from your car.

36880
5x60
Turnbuckle

For: Ultra Worlds, use 30093 and 30092 parts
from this kit.

30093
9mm Upper
Arm Ball End

31307
11mm
Pivot Ball

31305
Ball Washer

( Builds 2 upper rods for the left and right-hand side.)

36850
7mm Ball

36690
7mm
Plastic Ball End

* Make sure the pivot ball
move smooth.

For: Ultra Worlds ll, remain the upper rod
as shown.

36880
5x60
Turn Buckle

Assembly of the right and left hand side
are the same.

* Take the 4mm set screw
from your car kit.

36870
4mm
Set Screw

31303
Rear
Lower Arm

36850
7mm Ball

36690
7mm
Plastic Ball End

36690
7mm Ball

30092
9mm
Ball & socket

36850
7rm Ball End

ASSEMBLY OF THE SUSPENSION ARMS INTO
REAR GEAR BOX

3mm
E-Ring

Arm Shaft

* Use the parts that come
with your kit.

* Do not r tighten
5x5mm set screw over tighten.

#36055
Drive Pin

5x5mm
Set Screw

Rear Drive
Shaft

* Insert rear drive shaft
before assembly.

#36054
Wheel Drive
Nut, 8mm

* Adjust the upper rods length according
to the holes chose for attachment.

Plastic Washer
(3 pcs)

0 10 20 30 40 50

Multiple spacers are
needed to fit Kyosho and OFNA
cars using the same arms.

3mm
E-Ring

mm

Assembly of the right and left hand side
are the same.

* Set triangle marks in
the direction shown
in Fig.1.

3mm
E-Ring

Rear Wheel
Toe-in Adjuster

1
Degree

Fig.1

1.5
Degree

ASSEMBLY OF THE UPPER ROD INTO GEAR BOX

30061
4 x 25mm
Flat Head Screw

* Insert into rear hub.

3mm
Nylon Lock
Nut

Assembly of the right and left hand side
are the same.

4mm
Nylon
Lock Nut

ASSEMBLE THE FRONT AND REAR GEAR BOX ONTO CHASSIS AS USUAL.

REAR WIDTH SETTING

Adjust A and B to the same .

Adjusting B longer will make the rear tires
toe-in (Positive).

Adjusting A longer will make the rear tires
toe-out (Negative).

0 0

- -

+ +

A A
B B

C C'

C.L

Item No.

Description

#36082 Rear Wheel Axle Shaft 2 pcs
#31303 Rear Lower Arm 1 set
#31304 Rear Hub (Pivot Ball Type) 2 pcs
#31305 Ball Washer 4 pcs
#31306 Alum. Hex Nut 4 pcs
#36054 Wheel Drive Nut 2 pcs
#36503 8x16x5mm Ball bearings 8 pcs
#36055 2.5x17mm Drive Pin 4 pcs
#34010 9mm Upper Arm Ball End 2 pcs
#30092 9mm Ball and Socket 2 pcs

* Use a 2.5mm hex wrench to adjust
the rear track width.

SETTING GUIDE

length

PARTS LIST

Qty

3 x 25mm
Cap Screw

REAR CAMBER SETTING

The rear camber adjustment can be make by changing the length
of the upper rod.

Making the upper rod longer will make the camber positive.
Making the upper rod shorter will make the camber negative.

0

Upper Rod

- -

Item No.

+ +

Description

#31307 Pivot Ball 2 pcs

Front Lower Arm 1 set

#36890
#36690 7mm Ball End 4 pcs
#36850 7mm Ball 4 pcs
#36880 5X60 Turnbuckle 2 pcs

0

Qty