October 9, 2015

1/8" custom towers for Hot Dog 4

5mm extended front tower and the rear tower with the original shape. the original towers have extra holes for shock mounting and too thin for race.

September 21, 2015

'88 YZ10 (870C) and Hotdog4 update

Almost done.

'88 YZ10 built with
White winter arms
2mm fine pitch drive train
Yokomo Hotlaps wheels
Lightened diff cups
Composite Craft shock towers
Front aluminum bulkhead
AE steel turnbuckles from RC10 Worlds re-release kit
SRS steering blocks

Hotdog4 built with
AE 870C shock towers
MX4 rear aluminum CVD bones
Academy molded wing
Extended wheelbase with longer rear belt
White Kydex bumper, homemade
870C shocks with later shock ends for Works arms
AE steel turnbuckles from RC10 Worlds re-release
Magnesium bulkheads

Hodog4 has the copper springs now

And, few more pics with C4 body

September 13, 2015

Yokomo 870C shock tips

Do not use the small black O-rings in the kit.
use metric O-rings which is hard type. not the soft ones like in AE shocks. the orange ones from later Yokomo shocks worked well.

Put black large cap seals. Yokomo ones are not helpful. AE shock cap O-rings works fine

Do not put the shock end till you finish the shock. you can adjust the rebound without the shock end

[Original Post]
The purple shocks look great and leak bad. and there are two different way to build these shocks.

The old way is with springs inside. and another method is with a thin washer instead of the spring. both hold the plastic bushing tight and prevent the leak. but the washer is more simple and works better to me. another problem with the spring method is the stroke keeps getting smaller while the oil leaks

 It's easy to exchange the spring to the washer. the later kit came with 10mm thin copper washer, and any thin washer with 9~10mm diameter works. but the inside hole should be 4mm or more. this margin makes the piston and the red large seal doing their jobs. and, don't forget AE green slime

Sometimes we got broken shock shafts or alumium shock ends. or I want to use this non-leaking purple shock on my Hogdog4. later yokomo shock shafts are 3mm thick and they are too thin to be replaced. AE shock shafts work well with 870C shocks.

For this, you need to use the washer, not the spring. otherwise the shocks leak

With Composite Craft graphite shock towers and today's work

September 12, 2015

Yokomo CVD bones

This post would be a help.

And, t's the basic info for CVD bones
'94 YZ10 front CVD bone 84mm
'94 YZ10 rear CVD bone 79mm
MX4 rear CVD bone 79mm

Kysho RB5/RB6 70mm CVD bones work for 870C F/R

MX4 rear bone works with '94 YZ10 rear. and, Works F/R
'94 YZ10 rear bone works with Works F/R. and, for 870C front wide setup
Bj4 front bone doesn't work for Yokomo diff cups

'94 YZ10 front
from the top, MX4 Rear / '94 YZ10 Rear / Jconcpets BJ4 front
the pins

While the length is identical, Bj4 CVD bone don't work for Yokomo diff cups
deep inside
MX4 bones have longer head pins. it's fine except for 870C

870C front wide setup with '94 YZ10 CVD

Yokomo Hotdog4 build from YR4 kit

With YR4 kit and some Works bits

With MX4 rear CVD bones which has the same length with '94 YZ10 rear and Works F/R

Then ended up like this

Yokomo 870C build from the parts

thanks to my friends

wide setup with outer hole, Works CVD, SRS steering knuckle