The 750 is the successor of the 748 WC which won the World Championship in 2016

General

The Serpent Natrix 750 is a 1/10 scale 4wd gas-powered 200mm car. It has: belt-drive 4WD, a Centax TM clutch, the XLi 2-speed gearbox, 75cc fuel tank, a 3mm CNC machined 7075-T6 chassis, carbon fiber radio plate and shock towers, ultra-low CG big bore shock absorbers, ball-raced anti-roll bars.
New and improved, fully adjustable, suspension geometry. Improved flex adjustability. Easier accessible rear and front bulkhead design for quicker maintenance.

Chassis

Symmetrical chassis plate for perfect flex and torsion properties. CNC machined in 7075 T6 aluminum, anodized and laser engraved. Chamfered edges and countersunk holes for more ground clearance when cornering.
Central slots to mount optional tuning weights. The weights can be adjusted and secured with a single screw for instant tuning.

Radio plate

The 2mm carbon fiber radio plate has multiple functions:

  • It holds the fuel tank which is mounted on 3 aluminum posts with rubber dampers.
  • On the left hand side the receiver battery mounts to a carbon fiber mounting plate for perfect left right weight distribution.
  • The one piece radio installation tray mounts on the right hand side of the radio plate.
  • The radio plate now has an additional forward position to mount a (second) belt-tensioner.

Central Flex system

The rear section of the radio plate incorporates the 750 flex-control system.
It consists of 2 machined aluminum parts. The standard setting rigidly connects both parts and is the default setting. For conditions that require more flex, the optional ball-bearing flex system can be used.
Flex testing has shown that flex in the center of the car has the most effect and reacts most predictable as well.

750 receiver box

The composite receiver box is small but holds and protects the most common modern receivers easily. The antenna mounts to the top. The box is securely fastened to the radio bracket. The box is positioned as much to the inside as possible.
On the radio plate a small holder is fitted to accept the plugs of the battery, to act as on/off “switch”.

Battery-holder

Carbon fiber battery-holder positioned between the tank and pipe, for the best weight balance. The battery is easy to strap down to the racket with tape. Spacers can be used to mount the battery higher or lower depending on the battery you plan to use.

750 fuel tank

Low and durable 75ccm nylon fuel tank made from transparent material to easily see fuel-content. Large spring-loaded quick-fill cap with seal closes off the large tank opening for fast and easy refueling.
The bronze sintered filter will keep the fuel flow clean and makes sure tank will empty till last drop for maximum run time. The fuel tank sits very low in the car for low center of gravity. The Fuel tank is mounted with clips on 3 aluminum posts with rubber vibration dampers.

New Front bumper and body mount

New lighter front bumper with improved aerodynamics and excellent protection properties. The upper carbon fiber body plate mounts to the front bumper with aluminum posts to secure the front body posts.

Front shock tower

Super low 3.0mm carbon fiber shock tower with 3 upper shock mounting positions. In the center you can mount a 3rd body post as needed.

Front brackets

A compact and superlight structure of top quality aluminum parts consist of: top-brackets, L and R symmetrical bearing brackets and lower front suspension bracket.
The open style design allows for very fast exchange of belt, differential or anti-roll bar when needed.
The all-aluminum design guarantees an excellent precision and stiffness.

Suspension front

Strong, extra-long double A-arm suspension. The all new arms have nylon or optional carbon covers allow the adjustment of the arm flex. The new upper pivot-inserts have 3 positions to change camber gain.
The arms pivot on spring steel pins and aluminum pivot balls and nylon cups.
The front suspension allows full adjustment of ride height, front width, toe-in, roll center, caster, and camber and down stop.

Steering blocks

Very strong composite steering blocks with 2 Ackermann positions that are identical left and right.
The steering blocks feature inserts, which allow to change the kingpin inclination to a leading or trailing position.
The steering blocks also allow use of the optional carbon fiber aero disks to be mounted for less flex and a more direct steering feel.

Wheel axles / CVDs

The spring-steel wheel axles are seated in high speed bearings. The light and durable spring-steel CVDs used on all 4 corners of the car adds to the efficiency of the drive train.
The wheels are mounted to orange anodized high grade aluminum hex-adaptors using flanged and serrated wheel nuts.

Front anti-roll bar

The ball raced wire type front anti-roll bar is really easy to access and change with a different thickness as needed.
The anti-roll bar is linked to the lower a-arms with a unique pivot ball/cup system, which provides direct and smooth operation and is easy to set and adjust.

Rear brackets

Very rigid but open rear end design composed of machined aluminum brackets allowing for easy maintenance.
The left and right symmetrical differential brackets, are toothed and seat the eccentric bearing holders to allow for precise belt tension adjustment.
The all new design makes changing a differential or replacing a belt very easy.
The rear end features new, extremely narrow, machined aluminum lower suspension brackets which have 2-position roll center inserts.

The 2-speed gearbox shaft holders, double up as anti-roll bar mounts, and holds the brake system. All top quality machined parts with anodizing and laser-engraving

Brake –system

The low mounted brake system with superlight disk allows for smooth and even braking. The new system is lighter and very easy to access

Rear carbon shock tower
and camber bracket

The new 3.0mm carbon fiber shock tower was redesigned for lower GC and has 3 upper shock absorber mounting positions. The shock tower also holds the rear body posts and optional rear body stiffeners.
The new camber bracket offers 7 positions to choose from, 3 inner and 4 outer holes that were repositioned to complement the new lower wishbones.

Suspension rear

The new longer rear composite arms use plastic or optional carbon covers to allow the adjustment of the arm flex. The new geometry creates more rear traction while maintaining a very good rotation and giving more steering.
The arms can carry 2 different shock brackets and now feature the improved anti-roll bar connecting rod design of the front arms. The upper camber links connect to the new carbon camber bracket with 7 mounting positions for roll-center adjustment. The camber link is easy to access and has L/R threading for fast adjustments.
The aluminum pivot ball system in the uprights allows for fast changes in track width and toe-in.
On the inside the wishbone pivots on spring steel pins, seated in nylon, 2 position roll-center inserts mounted in the anodized aluminum suspension brackets.

Anti-roll bar rear

The ball raced wire type anti-roll bar in the rear is really easy to access from the top and change for a different thickness as needed. The anti-roll bar is linked to the lower a-arms with easy to adjust slop free ball links

750 Gear-differentials

The 750 has race proven compact, durable and light oil filled gear differentials. Precision molded steel gears, 2 small 14T and 2 large 28T create silky smooth diff action. Bleed holes make filling the differential a simple task.
The very durable and lightened spring steel diff outdrives connect to the CVD drive shafts.
Front and rear differentials share the same internal parts

CVD drive shafts

Spring steel, light and very durable CVDs are used on all 4 corners of the car. Precision mounted hard steel pins for low wear and high efficiency of the drivetrain.

Pullies

Precision molded super-true pulleys, which feature holed sidewalls to let debris move out easier. The gearing is chosen to give perfect front to rear drive ratio.

Belts

Low friction Kevlar reinforced belts with fine pitch. Long lasting and smooth.

True Motion Centax clutch

Serpent invented the Centax clutch in the mid 90-ties, and all brands have copied it since. Over the years the design has been improved and refined to create the ultimate in clutch design with the True Motion Centax.
Featuring a light Aluminum flywheel and pressure plate, precision machined flyweights, a machine ground spring and a clutch pad with the perfect mix of slip and grip for a racing clutch.

Downloads

Optionals

The range of optionals for the 750 is small as Serpent made the car top level racing ready.
Key optionals are the different spring used in the heave and roll damper, the lightwight/flex chassis plate, stiffeners and body height adjusters.

Nedded to complete the car

Body, body paint, radio equipment, speedo, motor, tyres/wheels, battery, tools, thread lock.