Why This Upgrade Is Needed
As riders continue pushing the limits of the Kawasaki H2 platform—often achieving 30%+ more power than a stock H2R—one critical weakness has become impossible to ignore: the factory lubrication system.
The OEM oil pump is adequate for stock power levels, but under increased boost and load many engines are now suffering conrod and main bearing failures caused by insufficient oil pressure.
Factory oil pressure typically ranges from 25–37 psi (model‑dependent) at 50°C / 4000 rpm, and can drop as low as 5 psi at hot idle. For a high‑performance forced‑induction engine, this is simply too low.
Why the H2 Engine Is Affected
The H2 family uses multiple internal shafts to drive the supercharger system. Each of these has oiling passages that bleed off pressure. Combined with Kawasaki’s intentionally low oil‑pressure strategy—used to improve efficiency and meet emissions targets—the result is a lubrication system that is fine for stock, but not suitable for elevated engine loads.
Our Solution
Working alongside world‑record‑holding drag racers, we developed a direct‑fit upgrade that retains the factory water‑pump location while dramatically increasing oil flow and pressure.
The system uses a wider, high‑flow Gerotor inside a precision‑machined pump body. This design delivers significantly more oil volume without requiring external pumps or complicated plumbing.
In 2022 we conducted year long testing of this upgrade with outstanding results.
Proven Performance
On a completely stock engine, our upgraded pump delivers:
- 30–50% more oil pressure across the entire rev range
- Additional pressure available when paired with a high‑pressure relief valve (optional, not required for most builds)
What’s Included
- High‑Strength EN26 Steel Gerotor Precision‑ground, polished, and supplied pre‑oiled in a sealed bag with a new hardened drive pin.
- Billet Oil/Water Pump Body CNC‑machined from high‑quality aluminium, anodized black, and fitted with new shaft seals and O‑ring.
- Assembly & Installation Instructions Includes silicone grease for correct assembly.
Recommended
For best results, we strongly recommend monitoring oil pressure using a gauge or sensor once the upgraded pump is installed.
