Will it increase performance enough to take my 96c.i. dyna to 103. or would 110 be a better upgrade?

 

107 cid with the correct setup will get u into the 120 hp range for performance. if you go for a 110 your cases have to be bored why stop there go for a 124!!!

 

What Target said. I would consider the Fuel Moto 107.

 

The FM 107" seems to me the best choice. Highest cubic inches possible without boring the cases. It's a mod that many here have done so there's plenty of testing done, FM has for sure the right maps already worked out for many different pipes/AC+cams combinations on the 107".
I'd definitely go for the 107". If I'd have to bore, then Id' definitely consider 124-131" something crazy like that.

 

Yep i go to a 107 if i was doing it. If your going to Z&M however to have work done be prepared to get a lot of grief as they frown on doing any kind of a put a smile on your face mod I would highly advize you to call or go talk to
McClain's Jam Cycle (724) 593-1369 This guy is awesome !!!

 

Thanks everybody, really helps. Latrobedyna I do not go to Z & M unless I have too. I purchased bike from Hot Metal!!

 

how far from hillside cycles are you. scott and craig can have that think honking!!!

 

107" as others have said is a good way to go. Cost wise, it's a good bang for the buck. Once you start going bigger, 117", 124", the cost goes up a lot.