Correct Diablo.

Personally I would not use the use the BPMR6F NGK in my MVVS 1.60 IFS. It is not the correct match to the Brisk UR17. It may work, but the projected tip may not promote optimal flame propagation in the MVVS head design.

The electrodes on the UR17, RDJ8J or BMR6F (I have run all three) are of the same pattern (i.e. not projected) and stay clean in my application. I think running a good synthetic oil with properly adjusted needles helps ensure this. I run mine at 3% (33:1) ratio - I don't skimp on oil.

fiery