K-Tech RAZOR-R LITE Shock Absorber Kawasaki Ninja 400 (2018-2023) 287SD-018-150-005

The K-Tech RAZOR-R LITE is an accessible entry point into genuinely performance-grade suspension engineering. Built around a precision-machined 35 mm body with a fully separated internal nitrogen reservoir, this shock absorber is constructed to standards that go far beyond anything the Ninja 400 leaves the factory with — delivering consistent, fade-free damping on every road or track session.

Key Features

• Internal nitrogen (N2) reservoir separates gas from damping oil, preventing aeration and maintaining consistent performance throughout extended riding sessions
• 16-click rebound damping adjustment allows precise fine-tuning of the shock's return speed to suit riding style and road surface
• Adjustable spring preload lets you dial in the correct ride height and sag for your exact weight and load
• Length adjustment range of -4 mm / +6 mm from the 320 mm standard length gives you meaningful geometry control without custom fabrication
• Multiple spring rate options available (46-180 series) so you can match the unit to your specific weight range and riding demands
• 12 bar nitrogen charge and a 14 mm piston rod ensure structural rigidity and long service life under repeated compression cycles

Build Quality and Premium Materials

K-Tech manufactures the RAZOR-R LITE to the same exacting tolerances as their higher-end race units. The 35 mm RCU housing is machined from high-grade aluminium, keeping unsprung weight to a minimum while providing the structural integrity needed to handle the stresses of spirited road riding and track days alike. The 14 mm piston rod is precision-ground to resist side-loading, and the internal sealing package is designed for long service intervals without performance degradation.

The eye-type upper and lower mounting hardware — 30 mm wide with a 10 mm bolt diameter at the top, 40.4 mm wide with a 10 mm bolt diameter at the bottom — is a direct, bolt-on replacement for the Ninja 400 OEM unit, requiring no frame modification. The 65 mm stroke and 100 N spring rate have been validated specifically for the Ninja 400 chassis, ensuring the geometry and progressivity suit the bike's architecture rather than being a generic off-the-shelf fitment.

On the Road and on Track

Riders upgrading from the standard Kawasaki shock will notice an immediate improvement in mid-corner composure, braking stability and overall rear-end confidence. The ability to adjust preload, rebound and ride height independently means the RAZOR-R LITE remains relevant as your riding evolves — from commuting and weekend touring to track days and club racing. The 8 mm preload adjustment range and 3 mm RCU travel give meaningful scope for setup changes without specialist tooling, though K-Tech recommends installation and initial setup be carried out by an authorised K-Tech Service Centre to ensure full performance and safety.

Fitment and Compatibility

This shock absorber is a direct OEM replacement fitment for the following motorcycles:

• Kawasaki Ninja 400 (2018–2023)

Specifications

Installation must be carried out by an authorised K-Tech Service Centre. Specialist tools and technical knowledge are required to ensure full performance and safety of the unit.