Does anybody know how many Kls per 1,000 revs in 6th gear for a 2009 FLSTC?

 Not sure Crazy, i'm guessin at 37-40. i had a heritage i while back now but that was an 04 model so gearing/final drive might differ. try looking at some dyno charts as that will tell ya.

I'm not much help but now your thinkin at least. 

 Ok I'm curious , why?

 Ok cool, I was told not to worry about using 6thgear unless your doing more than 110 kmh

there is a couple of website that work this out for you, try google if not I will link it when I get home,

They give you top speed with different tires etc,

Not sure if it was posted here or on the US forum,