Join Date: Jul 2008
Location: Sioux Falls, SD, USA
I also have a 2007 K12S and I had the same issue. Multiple trips to the dealer,airbox upgrade,latest firmware , etc., After installing the Booster Plug the problem was greatly diminished, however not completely eliminated. Especially on very hot & humid days.
I found the biggest problem to be ethanol in the fuel. If I can find ethanol free gas the bike runs much better. However this is not always possible, so when I must run ethanol fuels I add
Star-Tron fuel additive. You can find this at Wal-mart in the boating aisle. This stuff really works. As a master-mechanic I usually think all this stuff is snake oil, but I am really impressed with this product, It's the real deal. Good Luck !
"How long am I going to be dead ?"