CYBERIOUS : CYBORG CHARACTER

I like this guy.
He's ready for anything.
For me, my mind starts thinking about how he would work out in my game. I may use different rules than other GMs and that's ok. Every game is different. If you have players, keep gaming and have fun!
I know you said that he's just made to be a super tough cyborg and not viable as a generated character.
In an attempt to better understand the rules, I'm just going to consider how his implants, weapons, etc., modify his movement. This is just how I think about my games and not a critique of yours. The game is new and I need all the help I can get to better flesh out my game world.

WEAPON ARM (CHAINGUN) 13kg
ARMOR ENHANCEMENT (STEEL CARAPACE) 42kg
LASER PISTOL 1kg +.5kg power cell
PUMP SHOTGUN 4kg + 8 shells (400 gm each)
SHOULDER TURRET(HEAVY LASER CARBINE) 20+2D10kg* +2 Power Cells 1kg
FORCE FIELD GENERATOR (no weight listed.. pg 212 = 2kg)+.5kg Power Cell
SURVEILLANCE TENDRIL (no weight listed..) +.5kg Power Cell
COMMUNICATION IMPLANT W/SATELLITE UPLINK MODULE AND DISH 10kg (That sounds too heavy, in my opinion.)
**MINI ROBOTICS HANGER (3 SPIDER BOTS) (no weight listed..) +1.8kg x 3 bots

*Didn't include Laser Carbine in weight. The description is "entire contraption weighs.."
** The Robotics Hanger is a great implant. (I wonder what was moved around or removed so there's room for it. For my games, I'm using a compact version of the Internal Nutrient implant or the lungs are replaced with a modified "Oxygen" Supply Unit. You'd have to make room somehow, unless it's on the back. For this example, we're ignoring it, for now.)

I'm making a few assumptions here. Since the chain gun has 300 rnds, does he have an ammo pack? He could hand feed the 300 rnd belt with his other hand.. The ammo pack (pg 200) weighs 59kg, fully loaded with 300 HCR.
Also, he doesn't have to carry his Shotgun and Laser Pistol at all times.
Surveillance Tendril- Again, weight not listed. Ambulatory, snake-like cable; .25kg/m? That would be 5kg. I'm thinking that's on the light side.

With a 52 STR, he can pick up 52kg in each hand and still move.
All total, I figure Cyberious' encumbrance to be about 170kg.
Under "Meat Shield" (pg 107) it gives some examples/ideas on how to handle encumbrance.
a. STR 75 can pick up a medium sized (66kg) body with one hand and still hold a gun.
b. Using both hands, you can pick up a body up to 2x STR, but can't counter attack. Your hands are full.
c. STR 42 can pick up a 73kg body, since it isn't 2x STR and move across the street.
Except those listed above, every version of Meat Shield yields the same bonuses/penalties. -30DV, -2M.

Cyberious can lift 104kg and still move, but he is ~66kg over that! This character is tough. No doubt about it.
If I used him as an NPC, my players would want to do something similar. Goose/Gander.
When I use him, I'm giving him a Power Arm and Tracked Locomotion. That might do it.

This is a very interesting point that you bring up Prov13. In my Games I would have to rule that weight is a factor that would effect the amount of hardware/tech a borg could use. However from my experiences playing games like shadowrun this is a problem that could easily be fixed with varying degree's of hardware/tech quality. for example the weapon arm(chaingun); weighs 13kg as grade one, grade two could be made of lighter harder materials like glass-steel or ceramic-steel thus reduceing the weight by half to 7kg. these upgraded hardware/tech items would have to be found well excavating in order for them to be earned properly by the adventuring PC, never given. I would allow them to be bought only in the highest tech advanced cities and even then at incredibly high prices, maybe even jobs or services would have to be done for the merchant before he would even let you buy them at all.

Mmmm...arm mounted chaingun...drool

Cyberious would make a great boss-level enemy for the PCs, wouldn't he? Especially with that robot hangar, he can send out spiderbots to track and harass the PCs. Fun!

For encumbrance, I would just use the rule of thumb that PCs can carry no more than their STR in kilograms. At 50% + their STR, up to max STR, I would halve the PCs move rate (encumbered). For short distances and very slowly (1m move rate) i would let PCs carry heavier stuff, like another wounded PC, maybe up to x2 their STR in kilos. But not under normal circumstances such as traveling more than 100 meters, in combat, etc.  *** for cyborgs, I would not count their built-in implants against their max carry weight, only toward the cybogs total body weight.

This limitation may seem severe to some, not sure. But its roughly on par with realworld limits I think (average 25 STR guy can carry up to 25kg unencumbered, 50kg encumbered...thats 110 lbs!).

In my current homebrew system, I just use the original gamma world 2nd edition rules (1xPS in kg is unencumbered, up to 2xPS is 'encumbered', up to 3xPS (max) is 'heavily encumbered'). So that's pretty restrictive considering average PS is 11 (33kg max carry weight).