I am looking for some thoughts from the collective wisdom of the forum. I have a '99 WR400 with YZ timing. It has the stock exhaust w/o the baffle. Jetting: 48 Pilot, screw 2.25 turns out, DVP needle clip position number 5, 185 main (0 to 1500 ft alt). Air box lid is in place without the snorkel (helps keeps water out). Stock sparkplug NGK CR8E. The machine runs great - it is crisp and hits hard over the full range. However, the sparkplug looks rather odd compared to what I have seen on other machines over the years. The very end of the insulator, the tip of the center electrode and the straight end portion of the ground electrode are white (even though the tips of the electrodes do not look white in the scanned image). The rest of the plug is very black with carbon. Color goes from white to very black with no transition. How does this compare to other WR plugs?? Thanks for any help or ideas you can offer. Eric in WA '99 WR400, YZ timing, IMS Tank, YZ Seat, Acerbis Handguards, Yamaha Full Skidplate, Devol Rad Guards, Dunlop 755F & 756R Tires '99 Polaris 400 Scrambler '99 Honda Z50R '97 Honda XR70R Kubota L275DT and an assortment of farm tools.