instructions

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instructions










The HPI 2 speed transmission allows the RS4 to have more punch out of the corners and higher top speed. Different pinion and spurgear combinations can be used for different type motors and tracks.
WARNING: Never use a reversible speed control with a 2 speed transmission because it will damage the one-waybearing. Also, to prevent damage to the spurgears, never roll the car backwards or spin thewheels backwards.
Apply a few drops of oilto the one-way bearing.
4 x 6.5 x 4.5 Alum. Spacer
Remove stock Gear Shaft andreplace with 2 Speed Gear Shaft.
A292
Clutch Gear Hub
Z695
4 x 6 .3 Washer
6656
90T Spur Gear
for first gear
M3 x 5 Screws
6654
85T Spur Gear
for second gear
A290
Clutch Bell
Z695
4 x 6 x .3
Washer
Clutch
A291
Clutch Holder
M2 x 8 Pin
M4 x 4 Set Screw
.4 x 3 x 10 Spring
2mm Allen Wrench
6607
23T Pinion
6688
28T Pinion
Z243 E Clip
6675Pinion Gear Shaft
Z700
M3 x 3 Set Screw
Pinion Gear Shaftslides on motor shaft.
Apply a few drops of "Loctite"to pinion gear shaft.
Ball
adjusting the shift point
The shift point can be adjusted to optimize the transmission for each track. Disconnect thebattery pack before making any adjustments.
2 speed option parts
Part #
Description
Retail Price
6675
Pinion Gear Shaft
$7.00
6605
19T / 21T Pinion set
$16.00
6606
20T / 22T Pinion set
$16.00
6607
23T / 25T Pinion set
$16.00
6608
24T / 26T Pinion set
$16.00
6650
75T Spur Gear (48 pitch)
$4.00
6651
78T Spur Gear (48 pitch)
$4.00
6652
81T Spur Gear (48 pitch)
$4.00
6653
83T Spur Gear (48 pitch)
$4.00
6654
85T Spur Gear (48 pitch)
$4.00
6655
87T Spur Gear (48 pitch)
$4.00
6656
90T Spur Gear (48 pitch)
$4.00
6661
84T Spur Gear (48 pitch)
$4.00
6688
28T Pinion Gear
$6.00
A191
Gear Shaft
$5.00
A298
2 Speed Maintenance Kit
$4.00
Z243
E - Ring E 3
$1.00
Z515
Binder Screw M3 x 5 (Black)
$1.00
Z695
Washer 4 x 6 x .03 (Silver)
$1.00
Z700
Set Screw M3 x 3 (Black)
$2.00
HPI RACING15321 BARRANCA PARKWAYIRVINE, CALIFORNIA 92618
(714) 753-1099(714) 753-1098 FAX
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