• Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017
  • Cobra CX50 SR King - 2017


Cobra CX50 SR King - 2017




2017 Cobra CX50 SR Highlights & Improvements

2016 Cobra CX50 SR Highlights & ImprovementThe original King 50 was one of the most controversial bikes in motocross history. It was the very first truly race-ready 50cc motocrosser to hit the market, and it was so much better than all of it’s competitors that many lobbied to make the bike illegal for competition! The drama subsided, and in the ensuing years this little monster kicked off the careers of many of the world’s top racers including Ryan Dungey, Eli Tomac, Blake Baggett, Davi Millsaps, Trey Canard, Cooper Webb, Adam Cianciarulo, Thomas Covington, and Brock Tickle (just to name a few). For 2017, the base model King receives many of the improvements that the groundbreaking Factory Works King brought to market just a few months ago including:

  • NEW!  Frame – For 2017, our flagship King 50 receives updated steering geometry for improved straight-line stability and better tracking under rough conditions.

  • NEW!  Engine – The King will receive Cobra’s new Venom Series 50cc powerplant for 2017. This thing rips! Cobra engineers designed a  ‘no-compromise’ torque curve featuring massive amounts of low-end torque for launching off the gate and out of corners, this in addition to Cobra’s classic over-rev that provides that ‘2nd gear’ for wide open situations. This little beast offers more power, more torque, less weight and a smaller, lighter package.

  • NEW!  Off-plane Tuned Expansion Chamber – Packages tight, features D-shaped header for minimal flow losses.

  • NEW!  Lightweight Wheels – Cobra has taken its lightweight and maintenance-free wheels to the next level. Lighter wheels mean less rotating and un-sprung mass which translates into improved acceleration, handling, and flight control.

  • NEW!  Micro Handle Bars – Cobra is proud to announce the addition of Pro-Taper’s innovative Micro Handlebars across our 50cc lineup. These bars will revolutionize the way that young riders control their motorcycles by offering a reduced diameter grip area that inspires confidence and reduced fatigue.

  • NEW!  Bel-Ray Factory Fill – Cobra and Bel-Ray, two proud American companies with a long history in motocross, are teaming up this model year to ensure that each Cobra model comes from the factory with the finest in lubricants and chemicals. This includes everything from wheel bearing grease, to brake fluid, to suspension fluid, to the oil on the air filter.

  • 5Gx Freewheeling Clutch – Precision engagement, durable, freewheels for increased corner speed and easier starting.

  • Revolutionary MXT “Smart Leg” Front Fork – Cobra’s exclusive 32mm USD CARD fork is designed to be the finest fork in minicycle racing! The Smart architecture simultaneously provides supple action over small bumps, and progressive control through the biggest of hits…A feature especially important for minicycles that run on tracks torn up by bikes twice their size! This fork also features fully adjustable rebound and compression damping and bottoming control adjustment not found on any other fork of any size!

  • Billet Triple Clamps with Adjustable Bar Mounts – Works level hardware on a junior scale bike!


Dry Weight 91 lbs / 41 Kg
Engine Cobra Venom 50cc 2-stroke
Bore x Stroke 39mm x 41.7mm
Induction Case Reed V-Force® Reed Valve / 19mm Carb
Cooling Water cooled Top-end and case
Clutch Cobra 5Gx Freewhelling 3-Shoe
Transmission Single-speed auto
Exhaust Tuned pipe and silencer
Lubrication Mixture lubrication - Bel-Ray H1-R
Fuel Capacity 1.1 Gallons / 4.2L
Frame Twin Spar Oval HSLA
Wheelbase 990mm
Seat Height 680mm
Ground Clearance 245mm
Front Brakes Hydraulic Disk (160mm)
Rear Brakes Hydraulic Disk (140mm)
Front Suspension CARD Smart-Leg 32mm USD Fully Adjustable 210mm travel
Rear Suspension CARD Fully Adjustable (High and Low Speed) 248mm travel
Wheel Front / Rear Cobra 12″ Billet / Cobra 10″ Billet
Tires Front / Rear

Dunlop 2.5×12 / 2.75×10


“Why Buy” a 2017 Cobra CX50 SR

  • Broad Torque Curve

    • Excellent low-end torque and over-rev!

      • No compromise power delivery

  • 5Gx 3-Shoe Clutch (5thGeneration)

    • No plates to warp, Precision, consistent operation

      • Hits as hard at the end of a moto as it does on Lap 1. Freewheels for faster cornering and easier starting.

  • USD 32mm Front

    • Mechanical spring for consistent operation. ‘Right Sized’ for a small chassis. Fully adjustable cartridge design.

      • Inspires confidence over rough terrain

  • Piggyback Canister Rear Shock

    • Compression (high & low speed) Adjustment

      • Tunable for the rider. No-Fade performance throughout the race

  • REAL air filter

    • Air filter is mounted in airbox, not on top of air box. More surface area, More protection from dirt

      • Dirt or water that enters airbox cannot make its way into the engine. More power (especially in long motos and dusty off-road events)

  • Largest Air box in Class

    • Improved breathing. Large pre-carburetor volume greatly improves throttle response

      • Power when you need it!

  • One-Piece Aluminum Wheels

    • Stronger, Lighter Wheels

      • Reduced maintenance, improved acceleration and traction over rough terrain.

  • Billet, Wide Footprint Triple Clamp

    • Spreads the clamp load out over a larger area of the fork upper tube

      • Improved fork action

  • Billet Chain Adjuster Blocks

    • Strongest in class

      • Never DNF from a slipping rear axle again!

  • Twin-Spar Frame

    • Best overall combination of torsional flexibility and lateral stiffness

      • Excellent straight-line stability and cornering feel – inspires confidence – reduces lap times

  • Cobra Friction Drive

    • Allows some slip between the crank and rear wheel

      • Longer driveline life (crank, transmission, clutch, chain) and improved drive through rough choppy terrain

  • Progressive Rate Rear Suspension

    • Linear rising rate without a link! Reduced weight, and friction

      • Supple over small bumps for good traction…Absorbs big hits for aggressive riding.

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