Moose Offroad 37-1201 Rear Shock Bumper — Beta Race Edition / Yamaha YZ WR / Kawasaki KX

Moose Offroad 37-1201 — High-Density Progressive Cushioning, Impact Protection, and Advanced Shock Component Guard

Prevent harsh metal-to-metal contact and protect your rear suspension investment with the Moose Offroad 37-1201 Rear Shock Bumper. Engineered to endure the most violent bottoming forces, this high-density bumper provides essential cushioning during the final 25% to 30% of the shock’s compression stroke. Whether you are casing a triple on a Kawasaki KX450F or hitting high-speed G-outs on a Beta Race Edition, this bumper acts as a critical secondary spring, progressively slowing the shaft speed to prevent internal damage to the shock’s seal head and piston assembly.

Over time, OEM foam bumpers become brittle, crack, or dissolve due to exposure to UV rays, heat, and suspension fluids. A degraded bumper offers zero protection, leading to increased rider fatigue and potential chassis damage. The Moose Offroad 37-1201 is manufactured from a specialized elastomer compound that maintains its resilience and shape even under repeated full-compression loads. Designed for a precise fit on high-performance rear shocks from Beta, Yamaha, Kawasaki, and Suzuki, this bumper is the professional choice for maintaining the structural integrity and plush feel of your rear suspension.

• Progressive Damping: Specifically tuned to provide increased resistance over the final third of shock travel to eliminate harsh bottoming.
• High-Resilience Elastomer: Formulated to resist thermal breakdown and chemical degradation from suspension oils.
• Shock Component Protection: Absorbs energy that would otherwise be transferred directly to the shock seal head and internal hardware.
• Broad Application Range: Precision fitment for modern Beta RR Race Edition models, Yamaha WR/YZ series, and Kawasaki KX machines.
• Performance Restoration: Replaces cracked or missing OEM bumpers to return your suspension to its factory safety specifications.

Moto-House MX Pro Tip:

If you see yellow foam dust around your shock shaft or notice the bumper has cracked into pieces, it’s time for a replacement. Installing the Moose 37-1201 typically requires removing the shock spring and, in many cases, the seal head, making it the perfect "while you're in there" upgrade during a total shock rebuild. Always inspect your shock shaft for nicks or burrs before sliding on the new bumper; a smooth shaft surface is essential for the longevity of both the bumper and the main oil seal. For GNCC and desert racers, a fresh bumper is a must-have to survive the unpredictable hits found in off-road racing.

Technical Specification	Details
Mounting Position	Rear Shock Shaft
Cushioning Range	Last 25% - 30% of Travel
Material	High-Density Impact Elastomer
Units	Each

FAQ Questions

Q) Does this bumper fit the new 2025 Beta X-Pro models?
A) Yes, this bumper is verified for the 2025 Beta 200 RR X-Pro and other contemporary Beta rear shock configurations.

Q) Can I install this without taking the shock apart?
A) No, because the bumper is a solid ring, the shock must be partially disassembled (spring removed and usually the lower clevis or seal head) to slide the new bumper onto the shaft.

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