CX50JR

The CX50JR is the latest incarnation of the most successful racing motorcycle in U.S. History. This little bike has won every AMA national championship since its inception in 1997. That’s a perfect record over the course of nearly 30 years! We’ve improved upon last year’s all new model with even better handling and performance. Welcome to the big leagues Junior!

Performance

Engine

The CX50JR Venom Series engine delivers smooth power and torque providing, confidence inspiring performance.

Cylinder

The Cylinder of the CX50JR is a key component of its powerful Cobra Venom 50cc 2-stroke engine. Crafted with precision, the cylinder maximizes combustion efficiency, resulting in improved performance and power output. Its design ensures optimal airflow and fuel mixture.

Clutch

The CX50JR is equipped with the Cobra 5Gx Freewheeling 3-Shoe clutch. Our system ensures smooth and efficient power transfer, enhancing the bike’s acceleration and control.

Cooling

The CX50JR comes equipped with dual radiators. This cooling system optimally controls engine temperature, and the radiators are mounted up and out of harm’s way.

Exhaust

The CX50JR’s exhaust system features a meticulously engineered tuned pipe and silencer combination. This design optimizes the flow of exhaust gases, maximizing power output and torque throughout the RPM range.

Chassis

Frame

Hybrid Oval twin spar/Backbone frame: This chassis reduces weight, improves handling, allows the radiator to be tucked in, eases maintenance, and is stronger.

Swing arm

New in 2026 – 25mm of additional length for the precision-designed swingarm with an improved leverage ratio for the rear suspension, allowing for a softer rate shock spring. Gear up for optimal performance that allows riders to navigate through rough terrains with confidence. With its combination of strength, stability, and suspension efficiency, the swingarm of the CX50JR provides a solid foundation for riders to push their limits and conquer any motocross challenge.

Wheels

The CX50JR is equipped with high quality Cobra 10″ Forged & Anodized front wheels and Cobra 10″ Forged & Anodized rear wheels. These wheels provide excellent strength and durability.

Front Suspension

Revolutionary MXT “Smart Leg” Front Fork: Cobra’s exclusive 32mm USD CARD fork is designed to be the finest fork in minicycle racing! Cobra’s innovative design 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, and is built on a spring cartridge architecture that’s ready to tackle the toughest terrain right out of the crate.

Rear Suspension

CARD rear shock features high and low speed compression adjustment. The shock tucks in tightly for a slim mid-section providing outstanding performance and control. The new 2026 model is equipped with 25mm longer swingarm, improving the leverage ratio for the rear suspension and allowing for a softer rate shock spring.