After languishing in storage for a little over four years, I finally pulled out my old 80 John Deere Sportfire to see if I could get it to run once again. I was expecting the requisite carb cleaning and fuel line replacements, but was dissapointed to find the engine siezed up. I know I was bad for not prepping it properly, but that's another story. I've tried spraying the inside of the cylinder walls with WD40to get the gunk loosened enough to break the engine free. Any other ideas to get it loose, or am I doomed to tear it down? Thanx in advance.