I would check first to make sure yours requires the tool. I purchased the tool for my 2004, only to find out that I had the older setup. Your 2005 most likely has the new setup, but it won't hurt to check. I just changed my pipes with some Specialty Spares long slash cuts and have similar problems. It starts and runs great, but it's a little harder to start. I have to run the starter a little longer and twist the throttle a little once it catches. It will also stall if it's not totally warmed up. It's popping a little but not too much. It has always popped a little. I'm still adjusting the screws out, I'm at 3.5 turns now. I need to get an 18MM spark plug wrench to check the plugs. Don't know how it would be in colder climates, it's been in the 80's here in NorCal.
