Registered Forum User
Big Twin
Posts: 1,291
Join Date: Feb 2005
Location: Cleethorpes
Mood: Hmmm Conference season
Mine is running std ignitors at 52bhp, As Kev has said I would get the cam timing checked out, Mind it would have thought it would have to be a fair way out to lose circa 20% HP
What spec is the motor?? Airbox, Pipe,Jetting Etc
As has been said what is the fueling like on the dyno sheet, I think you need to scan and post it up here.