That stall rpm is an estimate. I’m not totaly sure what it really is. And I believe I saw 12,000+ as a max RPM. It made me a little nervous. I thought it to be TOO HIGH! As far as the #35 chain vs #219 … the #35 chain is what I’ve always run in the past, I can switch over to 219 but I would need all new gears. What would be the advantage in switching to 219?