MOTO-MASTER 620072450 7075 Aluminum Rear Sprocket — 520 Chain Size, 50 Tooth, Anodized Blue

MOTO-MASTER — 620072450 7075-T6 Blue Aluminum 50-Tooth Rear Sprocket, CNC-Machined 520 Drive Chain Pitch with Self-Cleaning Mud Grooves for KTM, Husqvarna, Gas Gas, and Triumph Dirt Bikes

When you are tearing up deep loam tracks, charging through single-track woodland trails, or pushing for the holeshot in competitive motocross, your drive system needs to transfer pure power without holding you down. The MOTO-MASTER 620072450 7075 Aluminum Rear Sprocket is engineered precisely for elite riders demanding an optimal strength-to-weight ratio from their drivetrain. Specially tailored for modern 520 chain drive configurations across a massive lineage of off-road motorcycles—including KTM SX/XC/EXC platforms, Husqvarna FC/TC/FE performance lines, recent Gas Gas MC/EC models, and the Triumph TF 250-X and TF 450-RC lines—this high-performance sprocket strips away unsprung weight from your rear hub assembly to drastically improve suspension response and rear-wheel acceleration tracking.

Manufactured to flawless tolerances in the Netherlands, this race-proven component is CAD-designed and CNC-machined from ultra-stiff, aircraft-grade 7075-T6 aluminum. This premium material selection delivers the rigid tensile strength of structural steel while operating at a fraction of the weight, making it one of the lightest, most durable aluminum sprockets available to the off-road racing market. To ensure consistent mechanical performance in grueling track environments, Moto-Master has engineered specialized self-cleaning grooves between each of the 50 teeth. These precision relief channels actively shed packed mud, sand, and clay out of the roller footprint, preventing hazardous chain tension spikes and extending the working life of both your drive chain and sprocket profile. The entire exterior surfaces feature a brilliant, color-anodized blue protective coating that acts as a hard defense system against aggressive gravel pitting, chemical cleaner etching, and chain friction wear, keeping your rear wheel layout looking factory-sharp ride after ride.

• Aircraft-Grade 7075-T6 Aluminum: Advanced lightweight structural material yields maximum torsional rigidity to prevent tooth deflection under extreme engine load.
• Self-Cleaning Tooth Design: CNC-machined relief grooves between every tooth continuously expel mud, sand, and trail debris to maintain safe chain tracking.
• Ultra-Lightweight Profile: One of the most effective ways to slash critical unsprung weight from your rear wheel hub for faster shock damping and quicker revs.
• Vibrant Anodized Protection: Premium deep blue anodized surface treatment increases chemical resilience and surface hardness while offering a clean, custom racing aesthetic.
• CAD-Engineered Precision: State-of-the-art tooling layouts guarantee a structurally stable tooth design with perfect 520 chain roller alignment and minimal frictional drag.
• Made in the Netherlands: Manufactured under strict quality controls to satisfy the rigorous performance standards of professional MXGP and off-road racing teams worldwide.

Moto-House MX Pro Tip:

A 50-tooth rear sprocket is a fantastic sweet spot for 250cc and 450cc four-strokes or 250cc-plus two-strokes when you want to punch out of corners harder without running out of top-end gear speed too quickly. Installation Tip: Never run a brand-new aluminum sprocket with a stretched, worn-out drive chain or a hooked countershaft front sprocket. Old components will instantly ruin the precision tooth profile of your new sprocket within two rides. We highly recommend matching this blue sprocket with a premium 520 sealed X-ring or lightweight non-sealed racing chain and fresh sprocket bolts. Maintenance Advice: When installing your rear wheel, use a torque wrench to tighten your sprocket bolts to factory manual specifications using medium threadlock. Check your chain slack carefully; an over-tightened chain will put immense leverage stress on your transmission countershaft bearing and cause accelerated wear on the aluminum sprocket teeth, even with premium 7075-T6 grading.

Drivetrain Spec	Material & Design	Core Vehicle Compatibility
50 Tooth Count	Aircraft-Grade 7075-T6 Aluminum	KTM 125cc–530cc SX / XC / EXC / XC-W (1995-2025+)
520 Pitch Drive Chain	Self-Cleaning Mud Grooves	Husqvarna FC / TC / FE / TE / FX / TX (2014-2025+)
Rear Mounting Position	Anodized Blue Coating	Gas Gas MC/EC/EX (2021-2025+) & Triumph TF 250/450

FAQ Questions

Q) Will this aluminum sprocket wear down faster than a standard steel sprocket?
A) Yes, any high-performance aluminum sprocket will wear faster than carbon steel. However, Moto-Master utilizes aircraft-grade 7075-T6 aluminum combined with a hard-anodized surface finish to offer the longest possible wear life for an aluminum component while saving you nearly two pounds of unsprung rotational mass compared to traditional steel steel variants.

Q) Does this rear sprocket include new installation bolts or threadlock?
A) No, this package includes only the 50-tooth blue aluminum rear sprocket. Because reusing old hardware can lead to loose components or sheared heads under load, we strongly recommend purchasing a fresh set of high-strength sprocket bolts and using medium-strength threadlock compound during the installation process.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. We are the best shop in Central Florida with lightning-fast shipping.