Registered Forum User
 GTL
 Bikes: ST4s ABS
     Posts: 480
 Join Date: Aug 2003
 Location: Tayside, Scotland
  
    
     Most folks fit NKG DPR8EA-9. These are the normal version of the iridium ones you've fitted and come pre-gapped at 0.9mm (36thou), although the manual specification is 0.6mm (24thou). The igntion system is well capable of firing the bigger gap which is less susceptible to plug fouling.