[darrenbashby]

First step would be to check and make sure that it has had the ground fix performed. Honda powder coated the grounding points where the harness grounds to the frame by the coils. Need to pull those grounds and file the powder coat off and clean the contacts. What do the plugs look like when you pull them? Is it burning lean? If there have been extensive mods to the airbox and exhaust, you may also need a fuel manager. When I changed my mufflers I had a problem with hesitation and surging. I got a Cobra FI200R, with the factory harness connectors rather than the wire taps. It took care of my mixture problems by enrichening the low rpm mixture. I left the mid-range and upper RPM mixture alone.

 

[darrenbashby]

The only place left I could find it was Dennis Kirk. They are a reliable company. Cobra Fi2000R Fuel Processor - 92-1650 Cruiser Motorcycle - Dennis Kirk

 

[darrenbashby]

As far as plugs goes, the iridium NGK IFR5-L11 are the best, and are almost 18 bucks each depending on where you go. They should theoretically last 100,000 miles. I was having mis-fire problems and had an NGK go bad. I used AC-Delco Rapid Fires #5 for troubleshooting to figure out I had a bad plug. They are a direct cross reference and run fine in my 05 VTX1800S. I keep a set of AC-Delco's around because they are relatively inexpensive, and then I always have a known good set of plugs.