Moose Offroad 1210-1742 49T Steel Rear Sprocket for Beta — Premium C45 High-Carbon Zinc Plated

Moose Offroad — Uncompromising Drivetrain Longevity and High-Carbon Steel Strength for Beta Motorcycles

The most common cause of premature final drive wear during grueling trail sessions is the rapid stretching and tooth rounding that plagues lightweight rear gears under load. Standard sprockets suffer from a "durability gap," where soft core compounds flex under sudden acceleration, accelerating chain wear and stealing rear-wheel horsepower. The Moose Offroad 1210-1742 Steel Rear Sprocket completely eliminates this maintenance headache for off-road riders by using premium-grade C45 high-carbon steel, guaranteeing absolute structural rigidity and maximum service life over the absolute worst trail terrain.

This isn't an ordinary replacement gear; it is a bulletproof chassis component engineered for seamless System Synergy with your Beta's rear wheel hub and final drive system. CNC precision-machined to razor-sharp tolerances, this 49-tooth sprocket features custom-engineered lightening holes that shave away parasitic rotational weight without risking the structural integrity of the drive line. By retaining a uniform roundness and an exact tooth face alignment, it ensures a Matched Performance mesh with your 520 drive chain, bringing back crisp throttle translation, stable chain alignment, and a Factory Quality standard that endures season after season.

• 1210-1742 (49 Tooth Steel Rear Sprocket): A precision CNC-machined 520 chain pitch high-carbon steel drive gear protected by a brilliant zinc surface plate, engineered to endure the highest torque outputs.

• Premium C45 High-Carbon Steel: Forged from a rugged, heavy-density industrial steel alloy that delivers unmatched surface hardness and structural endurance compared to aluminum options.
• CNC Precision Manufacturing: Carved to ultra-tight dimensional tolerances to minimize drivetrain vibration, guard shaft alignments, and deliver continuous rolling smooth performance.
• Weight-Optimized Lightening Holes: Strategically punched cutouts clear away dead metal mass from the core face, decreasing unsprung rotating weight for quick throttle response.
• Bright Zinc-Plated Finish: Covered in a defensive, high-luster zinc treatment that stops rust, oxidation, and road salt corrosion from taking hold after muddy trail pressure washing.
• True Factory Alignment: Cut perfectly concentric to original factory hub layouts, ensuring the chain glides centered over the teeth to lower frictional wear across your entire drive assembly.

Moto-House MX Pro Tip:

When bolting on a high-end C45 high-carbon steel rear sprocket, always make sure to refresh the components running alongside it. For optimal Matched Performance and to shield your new high-carbon gear from tracking errors, never pair a fresh sprocket with a worn, clapped-out drive chain. We strongly recommend upgrading to a fresh 520 sealed O-ring or X-ring chain and a new front countershaft gear at the same exact time. Ensure you apply a high-strength threadlocker to your sprocket bolts and torque them down evenly in a star configuration to factory manual specs.

Year	Make	Model
2013 - 2025	Beta	250 RR / 300 RR / 350 RR / 390 RR / 400 RR / 430 RR / 450 RR / 480 RR / 498 RR (2-Stroke & 4-Stroke)
2013 - 2024	Beta	350 RR 4T / 390 RR 4T / 400 RR 4T / 430 RR 4T / 450 RR 4T / 480 RR 4T / 498 RR 4T
2013 - 2024	Beta	390 RS / 400 RS / 430 RS / 430 RS 4T / 390 RS 4T Dual-Sport

FAQ Questions

Q) Why should I choose a C45 carbon steel sprocket over a lightweight aluminum one?
A) While aluminum sprockets offer massive weight savings, high-carbon steel sprockets deliver up to three times the operational lifespan. This steel configuration is perfect for endurance dual-sport setups and muddy off-road conditions where sand would wear aluminum quickly.

Q) What chain size must be paired with this 49-tooth Moose Offroad sprocket?
A) This rear sprocket is machined specifically for standard heavy-duty 520 width chains, which is the factory standard specification for the Beta RR and RS motorcycle lines.

Q) Does this high-carbon steel sprocket include matching rear hub installation hardware?
A) No, this includes the standalone 49-tooth zinc-plated steel sprocket only. We recommend replacing your tapered sprocket bolts with a fresh hardware set during final installation.

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