Posted by LS400p on May 04, 2001 at 13:16:25:
For my Spring maintenace last month I included replacing my NGK D8EA spark plug with the NGK DPR8EIX-9 Iridium plug. They are supposed to be harder to foul and last longer -important especially for a thumper. I can't tell any difference, but so far so good. -keeping the old one with the bike as a spare - you never know!