Kyosho Scorpion Online Build Part 1

Jun 25, 2014 No Comments by

Box_2

Here’s a link to the Scorpion unboxing, in case you missed it. With unpacking the kit out of the way, I’m ready to start spinning wrenches. The fun starts with a bunch of aluminum bits…

Chassis_rails

The chassis rails and steering bellcrank are assembled first, with hex hardware used throughout. The chassis rails are stout, solid-aluminum extrusions that are drilled and tapped to accept the front shock towers and rear suspension arm mounts. The steel rod clamped to the chassis is the “Front Arm Shaft.” It’s essentially a massive hingepin.

 

Alignment_marks

Kyosho has thoughtfully etched alignment marks into the Front Arm Shaft so it’s easy to properly center it between the chassis rails. The shaft can also be rotated to alter the caster angle. To help visualize adjustments, the pillow block has a ridge that aligns with setting marks on the shaft.

 

Servo_saver_bk

Here’s the servo-saver. You have to work against the spring to snap an e-clip into place and hold the assembly together, but it’s an easy job because the spring is very soft. This makes for a very active servo-saver, which was definitely the way to go with the fragile plastic-geared servos of the original Scorpion’s era.

 

Diff_installed

Next, the factory-built gear differential is slipped into the transmission and secured via a cap plate.  The bearings slide in easily yet the fit is very precise, which is appreciated when pressing bearings into metal.

 

Goof

The shock tower is attached next. When the motor is installed, it will butt up against the curved plastic piece. This will help prevent a blow to the motor from bending the motor plate.

Update: I put it on backwards, the curved bit should extend away from the transmission, not go behind it. Facepalm.

 

Shock_tower_gearbox_2

Same assembly viewed from the front. Not the plate that caps the top of the transmission.

 

Gearbox_guard

Moving along…three screws hold the transmission to the chassis, and a three-piece plastic cage wraps the rear of the car. The instructions call for the motor to be installed by this step, but I’m going to do it later in the build.

 

Shock_tool_2

From the chassis and transmission assembly, the manual moves to filling the shocks. First they must be opened up, which Kyosho makes easy with the supplied wrench and shock tools.

 

Shock_explode

Each shock is sealed by a single o-ring on the shaft and a thin, transparent plastic gasket (not shown) that fits over the seal cartridge. The gasket is a pain to push past the threads–I wish it were an o-ring. Filling the shocks properly for smooth action takes a few tries, as the volume of oil in each shock is very small. One drop makes a difference!

Jump to Part 2

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About the author

I've been involved in RC for over 25 years, and first joined Air Age Media in 1997. I served as Executive Editor until 2008, when I went to work on the manufacturing side of the RC biz. Now back at RC Car Action, I'm thrilled to be doing what I love most--not just enjoying RC, but sharing it with all of you. In addition to RC, I enjoy spending time with my beautiful wife Kathleen and our wonderful daughter Audrey.
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