Kawasaki H1 500 H2 750 S1 Oil Injection Check Valve Rebuild Springs/Balls

Small parts control big outcomes. In a Kawasaki triple, oil injection isn’t optional—it’s survival.

What’s Inside – (3) USA-Made Precision Phosphor Bronze Springs and (3) precision balls

• Manufactured in the USA • Tight spring-rate control for consistent cracking pressure

• Corrosion-resistant in oil environments

• Stable force over time—no mystery relaxation Precision Steel Ball (Metering Grade)

• Tight diameter and roundness control

• Polished surface for consistent seat contact

• Predictable sealing and repeatable oil flow

Why Precision Matters –  Oil injection check valves don’t fail loudly, they fail quietly by flowing too much oil, not closing properly and/or causing continuous flow when static. Precision spring force combined with precision ball geometry delivers repeatable oil metering you can trust.

Designed For Kawasaki H1 & H2 triples.

Riders preserving original oil injection systems. Builders who value originality and reliability. bikesThe Jess Difference No hardware-store substitutes.b No unknown overseas internals.esik No guessing what’s inside your engine. Just purpose-built precision where it counts. Precision parts for precise oil metering—because consistent oiling keeps triples alive.

Changing the precision springs and balls is a great start to preserving your motorcycle. Correctly cleaning the check valves prior to installing the kit is essential. If you need guidance, feel free to reach out to me.