Gents,
I'm thinking about a 106" or bigger. No way I'd want to do CVO110 heads on a heavy bike with a 95". I don't really want to go over 4.030", maybe 4.060". I shy away from the 4.125". [had one].
Cheapest deal would be the "SE" stock type tapered rod 4.375" crank [$660 or less at discount] for the '99-'06 A engines and 1.082" tall 103 pistons, but that crank scares me.
A JIMs 4.5" flywheel with 7.600" rods [.067" shorter, iirc] works nicely with a 103 piston. Bolt in, although piston to piston should be checked.
Would work with +.030" or + .060/.065" 103 pistons just the same.
I'm looking at other possibilities too;
A drop in [into a 103] SE 4" cylinder/piston deal would work with a stock rod length 4.375" crank or a Jims 4.5" with 7.600". Not nuts about the thin spigot on those either.
"Bore the cases" 4" cylinders of some sort. I haven't looks far into pistons for that option.
The 4.060" "bigger bore" cylinders from SE look like a deal, longer spigot, safe for the 4.625" SE crank [same as 120R, but for '99-'06A] . I understand that it has 7.575" rods, which work with the common 1.049"/1.050" tall, 4.060"/4.065/4.070" pistons. Fairly easy and not too pricey 120".
The bike has a Bob Wood 44mm cv, and a small primary Fatcat. So, no sense in trying to make a killer combo, since they would be a choke. I have conversion '07 up SE251s in the 95". They would be smallish for a big engine, but a lower rpm tractor would not bother me. I'd be willing to change cams, but I don't really want to change exhaust or carb.
HD street, thanks for the cutback under the seat info on -07s.
Dave