It also matters which wis. motor you're trying to find parts for. The tra 10d's seem to be the easiest while the s14d's are the hardest to find parts for, and all the others fall somewhere in between. Certain parts are harder than others. All internal parts for the S14D's are scarce and pricey. Rods for the TRA-12D's are hard to find in standard and .010" under. Ignition modules for the tech and wis are bringing high prices lately. The 10hp wisconsins are points ignition and easier to maintain. As far as internal tech parts, I have never rebuilt one, I just don't like them. Sorry.