the only problem that a couple of guys here are getting, is that after the engine cools it is very hard to start and bogs bad and once it starts it runs perfect,
I my self have the 07 version and the hsn was alittle lean had to richen it up 3 hours and low 1 hour other than that I really had no problems with the newer carb but with the older carb with out the update screw that I never got it right. but with the os carb I did not even touch the settings prior to installing it I just had to rich the top and richen the bottom and did not have a problem at all ran it all day yesturday and started up every time with no problem..Give it a try see what you think