[omg1010]

The oil pump consists of 2 rotors. One 10 mm and one 11 mm rotor. The trick is to replace the 10 mm rotor with its 11 mm counterpart (thus making it 2 rotors of 11 mm each). The difference of 1 mm requires a spacer to be laser-cut (outline of the pump itself) from a piece of 1 mm aluminum metal sheet. As a result you get an increased oil-flow of 10% .

But I am not sure if this applies only to the R1200S or also to the HP2S.

Brgds
Oliver