Stock vs. stock Brad. I'm not even sure if stock is a word in the Snelling dictionary?
Modded vs. modded is another story.
I'm not sure I understand. What is stock?
Was you're 261 at least MMd? Mod the muffler, shave a little off the flywheel key to advance the ignition a few degrees, tune the carb right, and they are fantastic saws. Very snappy throttle response and stronger than any other 50cc saw in that configuration.