Moose Offroad 1211-1539 49T Rear Aluminum Sprocket for Beta Gas Gas Suzuki — 7075 T651 Tempered

Moose Offroad — High-Performance Power Delivery and Tempered Alloy Strength for Off-Road Motorcycles

The most common cause of premature drivetrain wear on the trail is sprocket distortion and poor tooth alignment under high-load acceleration. Standard aluminum sprockets suffer from a "durability gap," where rapid flexing and thin material structures cause the teeth to hook quickly, ruining your chain and robbing you of rear-wheel power. The Moose Offroad 1211-1539 Rear Aluminum Sprocket solves this power-loss pain point for off-road riders by using premium, extra-tempered 7075 T651 aluminum that resists warping and delivers absolute structural integrity through the roughest terrain.

This isn't just an ordinary replacement gear; it is a weight-saving performance upgrade engineered for perfect System Synergy with your bike's final drive assembly. CNC-machined to perfection, this 49-tooth sprocket features a clean raw silver finish that maintains a classic look while protecting against severe friction. By maintaining optimal tooth thickness and uniform roundness, it guarantees a Matched Performance interface with your drive chain, delivering smoother power transfer, minimal friction, and a Factory Quality standard you can trust lap after lap.

• 1211-1539 (49 Tooth Aluminum Sprocket): A 100% CNC-machined 520 chain size rear drive sprocket finished in raw silver aluminum, engineered to provide custom gearing adjustments.

• Extra-Tempered 7075 T651 Aluminum: Receives a specialized thermal tempering step that minimizes distortion under heavy load and maximizes structural rigidity compared to thin standard 7075 T6 blends.
• 100% Fully CNC Machined: Carved entirely from a solid billet block with zero metal stamping or grinding, preserving original grain alignment and structural strength.
• Optimal Tooth Thickness Profile: Every tooth face is precision contour-cut to establish absolute full-width chain roller contact, lowering localized friction and extending drive component lifespan.
• Debris Clearing Edges: Cleanly cut gullet valleys help evacuate mud, sand, and trail debris instantly, preventing sudden chain tension spikes during sloppy trail conditions.
• USA Engineered Precision: Built to exacting geometric tolerances to ensure absolute concentricity, eliminating tight spots as the rear wheel spins.

Moto-House MX Pro Tip:

When upgrading to an advanced aluminum sprocket, always inspect the overall status of your drive line. For perfect Matched Performance and to protect your new premium alloy component from rapid wear, never run a new sprocket with an old, stretched chain. Install a high-tensile 520 sealed O-ring or X-ring chain along with a fresh countershaft sprocket. Always torque the rear sprocket bolts in a cross pattern to factory manual specifications, and ensure proper chain slack is maintained to secure smooth operation.

Year	Make	Model
2005 - 2013	Beta	250 RR / 350 RR / 400 RR / 450 RR / 498 RR / 500 RR / 520 RR / 525 RR
2000 - 2015	Gas Gas	EC 125 / EC 200 / EC 250 / EC 300 / EC 300F (Including Racing & R Models)
1997 - 2014	Gas Gas	MC 250 / MC 300
2006 - 2011	Sherco	450 SE / 510 SE
1990 - 1995	Suzuki	DR250S / DR350S

FAQ Questions

Q) Will this aluminum sprocket wear down faster than a standard steel sprocket?
A) Aluminum sprockets are inherently lighter than steel to decrease unsprung rotational mass for faster acceleration. To balance this out, Moose Offroad treats this sprocket with an extra-tempering process (T651) that vastly increases material density and resistance over standard aluminum options.

Q) What chain size does this 49-tooth rear sprocket require?
A) This rear sprocket is engineered to integrate perfectly with standard high-performance 520 width drive chains, which is the factory standard for off-road dirt bike machinery.

Q) Does this product include replacement sprocket bolts and locking nuts?
A) No, this includes the individual 49-tooth rear aluminum sprocket only. We highly advise grabbing a fresh set of tapered sprocket hardware during your installation process.

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