first i have a 12 SG with big radius pipes big city baffles and torque cones, A/C and a power vision tune running 12T103002401 tune as dynojet says the flow characteristics are about the same.

my issue the last two times i started it when the bike is cold it starts runs up to about 1100-1200, i live in az and it was upper 80's low 90's let it idle for a minute or so and go to blip the throttle and it would stumble if i try to take off at first it will stumble and act like it was going to die if i let it warm up a little longer i can make it about 100 yds and then it clears out gone no more issue at all! this just started in the last 2 starts only thing i can think is maybe a bad exhaust gasket or loose exhaust nuts, its always had bad decel pop but i just figured that on the short pipes. anyone got some input?

 

someone who knows that tuner will be sure to help you.

I do not think you have an exhaust related problem- more like fuel mixture

for reference with our recent temps, my bike ( no tuner- xieds instead)- will surge to about 1400 on start up, settle to 1200 or so...then be at it's usual 1000 rpm idle after a few miles.

I generally let the motor warm in the driveway for a couple of minutes...old habits, on the evos you had to do this, hammering a cold motor could squirt the base gaskets out the sides.
I warm it until the heads are warm to the touch

mike

 

You've got EFI, you shouldn't have to warm it up. You may have fouled your plugs.

 

well damn, thats what i was afraid of. this EFI stuff has me completely baffled

 

Sounds like its not tuned correctly

 

I had a bike that I had to warm up before I rode it since it was new. I had to wait on a cold start for the RPM to drop then I knew it was ready. If I was with a group I had to be the first one to the bikes because I had to let it warm up for at least 1-2 minutes if I stopped longer than a half hour. So now I'm on my bike with it running and everyone thinks Im in a hurry to go which I was not and just trying to get it to temperature. If I tried to ride it it would stumble until it was warmed up some. I came upon that it was very cold natured when it tried to throw (bucking) me in a lean when I would pull out the drive.

 

i wouldnt say its cold blooded, i havent had this at all since new i bought it in july last year, about to get my 5k done and probably a dyno tune it sounds like. I put my exhaust A/C and and tune on in feb. with no issues till last friday.

 

Bad tank of fuel maybe?????

 

maybe, shoot didnt think of that but it is still the same tank theres only half left ill burn it out and put some chevron in there i normally get my gas from QT and ALWAYS 91 octane. maybe its got a little water or something and after sloshing in the tank its mixed enough to run fine :/

 

if you think maybe you have crap gas- add as much better gas as soon as possible- do not wait.

mike