Description
Variable Ride Height Adjuster
Kawasaki Ninja EX400 / Z400 / Ninja 500 (2018–current)
Spears Racing’s patented Variable Ride Height Adjuster lets you raise the rear of a stock Ninja 400 / Z400 / Ninja 500 without buying a new shock. On a track-day or race bike it also lets you change the installed length of an aftermarket shock.
The insert can be fitted two ways on the stock shock:
- +5 mm (hole on top) vs. stock
- +10 mm (hole on bottom) vs. stock
Installation is a straightforward shock-mount swap and typically takes about an hour. The bracket is laser-cut from mild steel and replaces the OEM Kawasaki mount.
Ride height and swingarm angle (stock Kawasaki shock)
| Setup | Swingarm angle | Ride height change |
|---|---|---|
| Stock OEM shock | 9.5° | Stock |
| Adjuster at +5 mm | 10.3° | +10 mm |
| Adjuster at +10 mm | 11.3° | +23 mm |
Street riders can add rear height and change chassis attitude on the factory shock. Racers can use the same mount to fine-tune aftermarket shock length and swingarm angle.
Spears Racing has designed application-specific race parts for decades. This adjuster was developed and tested to replace the OEM bracket with a precise, repeatable mount.
Adam Faussett –
Great setup. I’m using the +10 and the tock shock length so I still have lots of adjustability left.