This listing includes a pair of DIAMOND+ 400mm Machined Shocks with Adjustable Reservoir for the Honda TRX 400EX, 450R & ER, 250R.
Also included: (2) 10mm coils.
We also offer extra-durable Delrin bushings in our eBay store!
Precision-tuned for the serious rider. These Diamond+ Shocks are designed to be fully customizable to your vehicle's weight, your riding style, and the terrain.
⚠️ Fitment Note: These shocks include 10mm bushings by default. If you require 12mm or 13mm (Harley-Davidson) bushings, please include a note with your order to ensure correct fitment.
| 🛠️ | Adjustable Length: Fine-tune your ride height by unscrewing the lower shock eye and setting the threading nut to your desired length. |
| 🌀 | Adjustable Preload: Dial in your sag using the included tool to tighten the collar above the spring coils. |
| 📉 | Compression Tuning: Control compression speed with precision. Use the included Allen wrench to adjust the inside silver knob on the top reservoir. |
| 📈 | Rebound Tuning: Manage the shock's return speed. Use the included Allen wrench to adjust the inside silver knob on the bottom reservoir. |
This listing includes upgraded 10mm coils (standard for this shock is 9mm). Spring rate specifications are listed below for reference.
| Coil / Kit Type | Spring Rate | Max Force (Per Shock) |
|---|---|---|
| 400 x 9mm Coils | 157 lbs/in | 618 lbs |
| 400 x 10mm Coils | 222 lbs/in | 873 lbs |
| 400 x Dual-Rate Kit | 200 lbs/in | 630 lbs |
For riders seeking maximum durability and tighter tolerances, we offer our Delrin Shock Bushing Upgrade. These are precision-machined to reduce play and extend the life of your mounting points. Available as an optional add-on during checkout.
Diamond J Customs Warranty:
Also included: (2) 10mm coils.
We stand behind our engineering. We will replace any shock components that fail within three months of purchase at no charge (limit one replacement per purchase).
*Note: Warranty does not cover normal wear and tear, improper installation, or misuse. Shocks installed at improper angles may increase bushing wear rates.
All sales subject to Diamond J Customs Terms of Sale.