Hi All,
I have a 2011 Fatboy that I'd like to upgrade to 103". Do I need to pull the engine to change cylinders? The service manual isn't clear but I'm pretty sure I don't have to. Thanks!

 

Nope, just the tank.

 

Thanks for the reply!

 

And to upgrade, you only need to have your stock cylinders bored out to 3.87" from where they are now (3.75".) 'Seasoned' cylinders are preferred over new out of the box parts in this case.

 

You can bore your stock (or a used set you pick up) and make the displacement 107" if you want....CP makes the pistons in 3 different compression levels so you can keep it low if you want or go p to 10.5:1. The top end can be done in the bike as stated above.