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> Cobra 811 B-e 1/8 4wd buggy EP (#600004)

> Description · Specifications · Images (55) · Downloads (2) · Spares (140) · Optionals (166) · Setups (9)


Product Type:
Electric Cars > 1/8 offroad

Serpent 1/8 scale buggy in electric powered version. Serpent Cobra Buggy E. The Cobra 811e is based on the same platform as the gaspowered buggy. State of the art design of the central section, with advanced integrated standing servo, receiver, speedo bracket, ingenious motor-bracket and lay-down Lipo-pack configuration with practical lid-system. Extremely narrow and low design, optimised for overall weight balance. New low body-design and lower rear wing / wingmount.

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> Description

Intro step 1

The Serpent Cobra S811-Be is the next  superbly designed  offroad car in the Cobra family.  The Serpent Cobra buggy was launched in middle of 2010, followed by the Serpent Cobra-T  Truggy in may 2011.  Now World Champion Billy Easton created another masterpiece, based on his longtime experience in top-level offroad racing.

Intro step 2

The Serpent Cobra-Be  follows the same design philosophy as with the gaspowered Serpent buggy and shares   most of the same components as well. The whole central section with battery-slots, esc and receiver holder, servomount and motormount, chassisplate, rear wing /  wingmount and the bodyshell are the key new developments in the Cobra-Be.

Intro, step 3

Keeping the weight  as low as possible, easy access to batteries, ESC and motor, and retaining a perfect balanced and fast car under all circumstances were the main goals to create a race-wining design.   This Serpent / Easton design  is  not about just replacing gaspowered elements  with electric power, but  a dedicated design which uses the available space in an optimal way, fully aimed at electric power use and ready to cope with extreme power of todays brushless motors.  

Gearing / diffs

The front and rear gear-diffs are the same and use a 13T - 44T  configuration, which from our test bring the best balance and accelleration.

The central diff uses the 46T main gear.

The new improved V3 coupler system feature a rubber boot and uses 2 larger sealed bearings 13x19x4 and 8x19x6 for maximum stability and durability.

Mud guards

In moist or wet dirt situations these mud guards reduce and dirt sticking to the rear drive shafts and shocks.

Composite rear uprights.

Durable composite rear uprights, fitted with superstrong rubber sealed bearings 8x16x5 outer and  15x21x4 inner.

Larger 3.5 mm outer rear hinge pins

Better impact resistance in crashes. Provides silky smooth suspension operation and longer pin life.

Captured universal joints

Guarantees you will finish a race without loosing a pin or set screw. All parts, axles and drive train components have capture pins

Hinge pin suspension balls

This relieves stress on the hinge pin when adjusting the kick up, or anti squat. Your pin is free to rotate to any angle without binding.

Captured and bolted hinge pins

All hinge pins are either captured or bolted in place. This insures your chances to finish an hour long main event, while battling for the lead.

Lightweight 3.5mm drive shafts

Precision machined spring-steel drive-shafts.

Flanged and serrated wheel nuts

Guarantees that you will not loose a wheel nut in a race

Composite rear wing mount

The low type composite rear wing mount, allows to change the angle of the rear wing.

Rear wing

Lower wing has two levels of angle. Helps improve down force and straight line capability.

Super Low profile Body

Superb appearance as well as keeps the profile low and even front to back.

Oils and grease included

The S811 includes high quality silicone oils for the difs and shocks  and a container of grease.

S811 Cobra decal-sheet

The car-kit comes with a set of S811 Cobra decal sheet, made on very thin material.

Manual, ref-guide and set-up sheet

The S811 comes with a 36 page full color manual, reference list and exploded views for parts reference.

A black and default set-up sheet are included with each kit, and more set-ups will be posted in the serpoent web pages.


The S811 car-kit comes packed in a colorfull  and strong Cobra design carton box / box-top.

The parts are packed in strong nylon bags, following the assembly steps / bag-numbers as listed in the manual.

Motor mount

The motor is placed in the most optimal position in the car, keeping motor-forces and transmission parts / alignment in mind.  Only one-screw  is needed to secure  the BL motor, in the nicely designed durable machined aluminium motormount. Space for additional motor-cooling available as needed.

The space for the motor allows a maximum motor-length of 70mm, which covers most widely used motors.

Battery-cases / side-guards

The main eyecatchers are the extremely low laydown longtudinal placed battery-packs at each side of the car, being part of the side-guards, securely fastened with a flip-lid, for easy and fast battery changes. The weight low in the car and in the right position, well balanced. The Lipo holders comply with ROAR legal packs / dimensions.

Lightweight Differentials and center spur.

Very compact and light gear-diffs.  By reducing the rotating mass, you can further increase the amount of out of the corner acceleration.

The Cobra-E uses a 13T / 44T combo gearing.
46T central diff gear.

Carbon fiber Shock towers

4.5 mm thick Carbon shock towers improve visual appeal, however also provide lighter weight.

Suspension brackets aluminium fr and rr

CNC machined suspension brackets front and rear. Very strong and durable, yet lightweight design, keeping the pivot-inserts well captured. Anodised and laser-engraved.

Symmetrical inner pivots
Front and rear pivots are in the same plane. This helps keep the care more neutral under cornering.

Zero scrub radiuses on steering knuckle

This feature helps reduce the jacking effect created by your steering knuckle offset. It provides a more direct feel while keeping the cars chassis more level while turning.

Steering blocks are fitted with superstrong rubber sealed bearings 8x16x5 outer and  15x21x4 inner.

Shock mounting Geometry on A arm.

Helps when locating the shock on the lever arm to re adjust the shock length and angle without changing other unnecessary things.

Front Steering knuckle assembly

The front roll center can be changed quickly by moving the steering knuckle shims to their appropriate locations.

Adjustable wheel base

5 mm of wheel base adjustment in the rear from 322.5 to 327.5 mm.

Composite chassis braces

Allows the chassis to flex which helps improve bump handling. Front and rear.

Front bumper

Helps reduce the lawn dart effect on nose down jump landings. Also helps to prevent scrubbing off speed on moguls, and whoop style bumps

Chassis kick-up

Most angle in its class, this will provide more clearance for attacking even the most destroyed jump faces. It will insure you can guide your way up the face without scrubbing off any valuable speed.

Eccentrics on suspension mounts

There is a range of different eccentrics you can use to adjust your kick up in the front of the vehicle as well as the anti squat in the rear.

Long steering tie rods

Based on the bell crank design the rod length has been optimized to be as close to the same length as possible to further reduce bump steer.

Big bore shocks 16mm

You will enjoy all the benefits of this compacted bigbore  design with large o rings and superb bleeders. The larger o rings provide less overall pressure and a better seal without all the dragging on the shock shaft.
Laser angraved black tops.

Threaded shock bodies
This is for reducing parts in your pit bag. No more clips to loose. It helps adjust in much finer increments.

Oversized 4mm shock shafts
Reducing damage to shock shafts from hard jump landings or impacts.

Shock boots with bump stop
Shock boots have been designed to increase life, seal and utilize rubber as a cushion to prevent damage to suspension components.

Shock spring buckets with debris drain and key locator  The spring buckets at the foot of the shock have drain holes to get dirt, water and debris out of the usable shock zone. The key locator helps to align and lock the spring bucket into position so it stays put during operation.

Captured ball cups

All camber links, steering links and steering servo links have been trapped. This will help prevent any ball cups from popping off.

Anti-roll bars

Front and rear anti-roll bars made of spring steel wire and size indicated with engraving.

Anti-roll bars are ballraced  for effectiveness and smooth operation.

A variery of optional ones available.

Chassis 811-E

Improves overall ground clearance on sides for minimal chassis dragging. This is an improvement for jumping and cornering over uneven ground. With less mass out wide the car will pitch less in the corner, but also stay straighter in quick left to right cornering.

Machined chassis 3mm
Light weight chassis helps minimize weight and improve overall vehicle performance.  Countersunk holes. Anodised in titanium color and  laser engraved Cobra logo.

All suspension mounts are keyed into position
This helps to relieve the mount of any side forces from tumbling in a crash. It take the pressure off the screws and transmission case and puts that force on the chassis.

Pillow Ball sway bar joints

This is a quick and easy way to adjust the left and right tweak of your sway bar.

Roll center adjustment

The front roll center can be changed quickly by moving the steering knuckle shims to their appropriate locations.

Ackerman plate

With the design of the steering bell cranks when changing the Ackerman you will not need to adjust your steering tie rods. You simply will only need to adjust your end points on your radio.

Other optional Ackerman plates available.  

Angled Bell cranks

The bell cranks are angled to reduce the angle of difference between the total caster and steering plane. Therefore you will have less bump steer and a truer steering Ackerman through the entire range of suspension

Captured Servo Saver assembly

Reduces unwanted debris from destroy servo saver faces. Which will prevents any sort of premature servo damage.


With so many great features there are no doubts that the car will be a performer. In a world of details, the S811 will most likely dazzle you. From the front of the Car to the rear, there are so many things to enjoy. With a background and success of a company like Serpent, you will be very satisfied with the quality and performance of the S811 Cobra.

Team Serpent