Product Description
TrailMaster 300 XRX EFI – High-Performance Adult Go-Kart
The 300 XRX EFI is a serious performance kart: 300cc fuel-injected, liquid-cooled power, CVT with reverse, hydraulic disc brakes, and a tuned suspension. IMPORTANT DISCLAIMER: This kart is built for speed and higher-speed trail riding. It is not designed to creep or crawl up steep hills. Choose this model only if you want performance and have the experience to maintain it.
- 300cc EFI, liquid-cooled single-cylinder — performance-tuned
- Automatic CVT with reverse — no clutching required
- Hydraulic disc brakes (front & rear)
- Independent dual A-arm front suspension • rear swingarm shock
- Adult-size chassis; tighter cockpit than simpler models
- Built for speed — not intended for hill crawling
The TrailMaster 300 XRX EFI brings fuel-injected reliability and liquid cooling to a full-size kart platform designed for speed and responsive handling. It rewards experienced owners who follow break-in and maintenance, and who ride where momentum matters more than low-speed crawling.
Note: the radiator plumbing routes under the seats, so the cockpit has slightly less legroom than our simpler 200-series karts.
- EFI 300cc liquid-cooled engine — cleaner starts, altitude-friendly fueling
- Automatic CVT with reverse — easy operation, no clutching
- Hydraulic disc brakes front & rear for confident stopping
- Dual A-arm front • rear swingarm shock for control at speed
- Performance emphasis: made for speed and flowing trails, not slow hill climbing
- Adult-friendly cockpit, but tighter legroom than 200-class models
Engine | 300cc EFI, liquid-cooled, 4-stroke, single-cylinder |
---|---|
Transmission | Automatic CVT with Reverse |
Brakes | Hydraulic disc (front & rear) |
Suspension | Front dual A-arm • Rear swingarm shock |
Wheels/Tires | Off-road tires on rugged rims (sizes vary by production) |
Cockpit | Adult-size seating with reduced leg clearance vs 200-series |
Fueling | Electronic Fuel Injection (EFI) |
Oil | SAE 10W30 (all our machines use this) |
Need exact tire sizes, belt PN, or dimensions for your batch? Contact our team and we’ll confirm before you order.
Full-size adult platform with a performance-tight cockpit. Taller riders should verify reach and knee clearance. For rider height tips and comparisons, visit our Sizing Guide.
- TrailMaster 300 XRX EFI go-kart (factory crate)
- Owner’s documentation
- Basic tool kit
- GoKartMasters setup resources
Ships securely in a crate with partial pre-assembly. Final steps typically include steering/controls, battery, fluid checks, fasteners, and proper break-in. Recommended for experienced owners due to its performance focus.
Every 300 XRX EFI purchased from GoKartMasters is backed by our support team. For maintenance items and upgrades, visit our TrailMaster Parts Hub or contact us for fitment help.
Is this a beginner-friendly kart?
No. It’s a performance machine for experienced riders who want speed and understand maintenance.
Can the 300 XRX EFI crawl up steep hills?
Not recommended. This model is tuned for speed and momentum on flowing terrain, not slow hill crawling.
Why is cockpit space tighter?
Radiator lines and performance plumbing run under the seats, reducing legroom compared to 200-series models.
What maintenance should I expect?
Follow break-in procedures, check cooling system and drivetrain regularly, and keep up with fluids and fasteners.
What oil do you recommend?
All our machines use SAE 10W30. Prefer premium? We recommend AMSOIL Small Engine 10W-30 (shop via our link).
Safety & Gear Recommendations
Always ride with a properly fitted helmet, goggles, and gloves. We recommend:
- Adult Motocross Helmet
- Carburetor Cleaner
- Seafoam Stabilizer
- Hour Meter
- TrailMaster Blue Paint Match
- Racing-Style Harnesses
- Whip Light
More picks and deals: bit.ly/m/gokartmasters.
Other Details
Warranty Introducing the Master Warranty for Trailmaster Go Karts! Enjoy 12 months of comprehensive coverage against manufacturers' defects, ensuring your off-road adventures are worry-free. Explore with confidence, knowing your Trailmaster go kart is backed by our GoKartMasters commitment to quality and performance.The best FREE warranty you will find anywhere for a Trailmaster Go Kart. Discover the ultimate solution for sourcing those elusive, hard-to-find Trailmaster go-kart parts that enthusiasts crave. At Trailmaster Parts Direct, we're your trusted destination for securing special order go-kart components. We understand the value of maintaining your Trailmaster go-kart in peak condition, which is why we offer a vast selection of rare, uncommon, and challenging-to-locate parts. Are you in need of a specific Trailmaster engine component, suspension part, or any other specialized piece? Look no further! Our extensive inventory encompasses a wide range of Trailmaster go kart parts, including but not limited to air filters, control arms, steering components, and unique accessories. Our commitment to providing these elusive parts ensures that your Trailmaster go-kart runs flawlessly, delivering the performance, durability, and excitement you expect from this legendary brand. With our special order service, you can confidently address any maintenance or customization requirements with ease, allowing you to embark on thrilling off-road adventures, confident that your Trailmaster go-kart is equipped to handle the toughest terrains. Trust Trailmaster Parts Direct to help you locate those elusive components, and keep your Trailmaster go-kart at the peak of its game. Whether it's an engine overhaul, a suspension upgrade, or any other specialized part you require, we've got you covered. Explore our exclusive selection of Trailmaster go kart parts and ensure your off-road journeys are always exceptional. When it comes to off-road adventures, few brands can rival the exceptional quality, craftsmanship, and customer service that Trailmaster offers. Let's delve into why Trailmaster go-karts stand head and shoulders above the competition. Quality You Can Trust: Trailmaster takes immense pride in crafting go-karts that are not just machines but engineered masterpieces. Every component, from engines to suspensions, undergoes rigorous quality checks to ensure peak performance and reliability. Our dedication to quality extends to the materials we use, ensuring your go-kart stands up to the harshest conditions and delivers years of thrilling rides. With a Trailmaster go-kart, you're investing in a vehicle that's built to conquer the toughest trails with ease and durability. Craftsmanship That Shines: Our go-karts are a testament to the art of engineering. Meticulously designed and assembled by skilled craftsmen, each Trailmaster go-kart boasts precision, attention to detail, and innovative engineering. We leave no stone unturned to ensure that your off-road experience is not just exhilarating but also safe. Our commitment to superior craftsmanship translates into a smooth, comfortable ride, advanced suspension systems, and exceptional handling. It's this level of craftsmanship that makes Trailmaster go-karts a cut above the rest, allowing you to navigate challenging terrains with confidence and style. Customer Service That Cares: At Trailmaster, our commitment to our customers doesn't end with a sale; it's just the beginning. We take pride in our exemplary customer service, always ready to assist with any questions, concerns, or needs you may have. Our knowledgeable and friendly team is dedicated to ensuring your satisfaction, offering expert advice, and providing prompt support when required. When you choose a Trailmaster go-kart, you're not just getting a high-quality vehicle; you're becoming a part of the Trailmaster family, where your off-road adventures are our top priority. In summary, Trailmaster go-karts embody a commitment to quality, craftsmanship, and customer service that sets us apart in the world of off-road vehicles. With Trailmaster, you're not just purchasing a go-kart; you're investing in an exceptional off-road experience, backed by a brand that cares deeply about your adventure. At Gokartmasters, safety is our unwavering commitment and top priority. We understand that every exhilarating journey on a Trailmaster go-kart should be paired with peace of mind, which is why we leave no stone unturned when it comes to your well-being. One of the cornerstones of our safety philosophy is the emphasis on DOT (Department of Transportation) helmets. We firmly believe that wearing a DOT-approved helmet is non-negotiable for every rider. These helmets are rigorously tested to meet stringent safety standards, providing superior head protection in the event of an accident. Your safety is paramount, and our insistence on DOT helmets is a testament to our dedication to keeping you secure on every trail. Furthermore, our commitment extends beyond helmets. Our Trailmaster go-karts are designed with advanced safety features, including roll cages, safety harnesses, and robust construction, ensuring that your ride is as safe as it is thrilling. We encourage responsible riding practices, including wearing appropriate safety gear, following recommended age guidelines, and respecting trail rules and regulations. With Gokartmasters and Trailmaster go-karts, you can trust that every adventure is a secure and unforgettable experience, backed by our unwavering commitment to safety.Product Videos
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300 XRX
We are still putting it together, holidays and a lot more to it; I understand the need for a secure frame but I wonder how many have a tractor and a winch?