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[bbsiding]

I've been looking at the S&S 107 and 117 kits lately. I have a couple bikes to breathe on coming up and am concidering using these. Can I just have the cylinders (110 Granite colored) bored to take the big piston on a 110?  Same question for a 107 piston in a 103/96 motor? 

[HD Street Performance]

A 96" cam be bored to 107" with aftermarket CP pistons, flat top or domed, at 3.937" bore.
A 110 can be bored to 113" with aftermarket Mahle pistons, flat top or domed, at 4.060 bore

[bbsiding]

So then the 117 requires the kit from S&S? with new cylinders? or am I way off base? Do the cases need bored to accept 117s?

[HD Street Performance]

Exactly, S&S makes an excellent kit, cases are bored and IMHO the crank needs to be addressed as well.

[FlaHeatWave]

So then the 117 requires the kit from S&S? with new cylinders? or am I way off base? Do the cases need bored to accept 117s?

Yes the cases require boring to accept the 4.125 pistons for 117"