I have Bob Woods 555 cams, a Cobra air cleaner, SandS power tuned dual headers, Vance and Hines Monster Squared mufflers and an auto tuner.
I tried the NGK Iridium DCPR 7EIX plugs and the bike ran horrible. Backfired and missed at low RPM's. Switched back to plain ole NGK DCPR7E and bike runs great.
Save your money on the 103 motors and buy the $2.75 plugs. Gap them at .40 and ride.
I'll never buy expensive plugs again.
Pete
I tried the NGK Iridium DCPR 7EIX plugs and the bike ran horrible. Backfired and missed at low RPM's. Switched back to plain ole NGK DCPR7E and bike runs great.
Save your money on the 103 motors and buy the $2.75 plugs. Gap them at .40 and ride.
I'll never buy expensive plugs again.
Pete