NACORE rear shock absorber 8.7" (221mm) for MX650/500 SX500 — progressive spring, tuned damping

The NACORE 8.7" (221mm) rear shock absorber delivers firmer damping and a noticeably smoother ride for MX650/500 and SX500 electric dirt bikes and similar pit bikes.

Designed as a direct replacement or upgrade for compatible electric dirt bikes, this NACORE shock focuses on stability, impact control, and easier installation. Built to match common mounting dimensions for MX650/500 and SX500 models, it reduces harshness from rough terrain and helps the rear wheel stay more planted during acceleration, braking, and cornering.

How does this shock improve ride comfort?

The NACORE rear shock uses tuned damping characteristics to absorb bumps more effectively than worn or stock units. That reduces oscillation after hits and limits shock transfer to the frame, so the rider feels fewer jolts and maintains better control.

• Tuned internal valving for controlled rebound and compression
• Progressive spring rate to handle varied terrain
• 221mm eye-to-eye length for correct geometry on compatible bikes

Will it fit my MX650, MX500, or SX500?

This shock is intended for MX650/500 and SX500 electric dirt bikes and many pit bikes sharing the same 8.7" (221mm) eye-to-eye dimension. Check your bike’s mounting spacing and eyelet diameter before ordering to confirm fitment.

• Eye-to-eye length: 221mm (8.7 inches)
• Two eyelet mounting holes for straightforward attachment
• Compatible with many models using the same mounting specs

How easy is installation and maintenance?

Installation is straightforward thanks to the two eyelet attachment points; ordinary hand tools are usually sufficient for swap-out. The unit ships as a complete single shock; standard bolt torque and safety checks are recommended after installation.

• Simple eyelet-to-eyelet replacement—no complex brackets
• Sold as one complete rear shock absorber
• Perform torque checks and a short test ride after fitting

What performance changes should I expect on trails or roads?

Compared with a fatigued or undersprung shock, NACORE’s unit provides crisper damping and improved stability when accelerating, braking, or rolling over obstacles. Riders typically notice reduced frame vibration and better rear-wheel contact on uneven surfaces.

• More consistent handling over repeated hits
• Reduced bottoming-out on bigger impacts
• Better traction and predictable feedback in corners

Who is this for: The NACORE 8.7" rear shock is aimed at riders and mechanics who want an affordable, direct-fit suspension upgrade for MX650/500, SX500, and like-sized pit bikes. It's a good choice for riders looking to restore damping performance after wear or for those wanting more control on mixed-terrain rides without complex modifications.