I picked up a Husqvarna 455 Rancher (2005) that the previous owner ran straight gas in. The problem was no compression. I did a complete tear down with new cylinder & piston, new crankcase seals, new cylinder seals. I put everything back together and it started up well. Put the chain on and it bogged when cutting with throttle. I then attacked the carb - I cleaned it all out - No change bogging under throttle starts only with choke on. I then ordered a complete carb kit - changed fuel filter, fuel line to carb, new primer bulb, new air filter, new spark plug, and new carb - exact same result. The saw will idle nicely with choke on, but when the choke is closed the rpms skyrocket and also throttle bogs. The only line I did not change was the one from the cylinder up into the intake - maybe I should change that one. Anyone have any ideas what to check next? I did add a little bit more 2 cycle oil to the gas for break-in, but is it possible that is the issue? Thank you in advance!