I'm in the clip 1 of the EK and I still could afford to go leaner on the needle still. I'm thinking of getting the CK needle but I dont think its going to make enough difference. Anyone run a CK or know of an alternative non yamaha needle that's leaner than the EK? My plug is not showing signs of detonation yet, tan on the insulation, partly tan partly brown on the inside of the plug walls, zero white spots. The EK and 165 main cleaned up 50% the spooging from the EJ/168, but still some spooge. 20-30 deg celcius 5000-6000ft 165, EK clip1, 42 pilot. 91 octane w/ lucas octane boost mixed at 25L. Opti2 65:1 Squish done.