New guy here, i have a 12.5hp horizontal opposed twin, i tore it down to fix something else and wanted to get more power and torque out of it while i have it out. I'm not a racer really, but the mower it's normally in has always seemed underpowered.
I'm trying to find out what to do to it while i have it apart. It's a full pressure lubed engine, so i think parts are a little more hard to come by. I do have access to a full machine shop and want recommendations on what i can do to this thing while its apart.
Any ideas? I'm not opposed to mods, but really would prefer not to spend a fortune on it.