How to: Stihl MS290 Chainsaw Muffler Mod, Carb Tuning & Speed Test

A description of how to do a muffler mod on a Stihl chainsaw, including carburetor tuning.\r
In the speed test at the end I also used an RS chain following the muffler mod, whereas in the stock test the saw still had the fory RMC3 chain on.