Have a 09 Fatboy had pipes,air cleaner and download done when new has 850 miles on it rode yesterday it was 98 deg out motor seemed to run hot,later in day seemed like when it got hot one cylinder would shut down. Today went riding doing same thing also seems to be running rough and no power.The Fatboy dont shut down rear cylinder when they get hot do they? After bike sits for a while and cools down sounds and runs fine until it gets hot

 

Sounds like te Heat Management program kicking in. The bike should only run on 1 cylinder when at idle at a pre-determined temperature. Once you begin to apply the throttle, such as when leaving a stoplight the rear cylinder should come back on. If however you're experience thiswhile riding, I don't know what to tell you except to consult your dealer.

For what it's worth, the Touring bikes are able to activate and deactivate the Heat Management feature by twisting the throttle forward and holding it in place for approx 5 seconds. Since your Fatboy is not throttle by wire, I would assume that only your dealer could deactivate it, if in fact that is what's going on. Either way, it sounds like something is malfunctioning.

 

Just had mine kick in the 1st time last week while waiting on a train, 6-8 mins,?, it was about 94 out.. at first I thought WTH. but I move forward a little and she ran fine..

 

With a 98*F outdoor temp, any air cooled harley seems to run hot. It will roast your chestnuts.

 

didnt get off work before dealer shop closed but called them they said to bring it in sounds like they need to check out problem,after i got home checked plugs they looked ok so i decided to check oil rode 300 miles this weekend it was full before the 300 mi now its 1/2 quart low i checked it hot

 

I'm pretty sure Softails don't have the rear cylinder cutout. Not by design, anyway.

 

Just wonderin' if'n you found that missing motor yet? I gots a spare one if'n it's still missing.

 

Found problem when they did the download for pipes and air cleaner they downloaded the rear cyl shut off only the touring bikes come with this but they can put it with the download it kept the cylinder shut off which seemed like a miss. They changed the download and removed the shut off. Thanks for everyones advice