Ok, can't edit here to correct a title miss spelling or to really update the description. So who would be interested in the first video posted? Those folks looking to understand the difference between a Husqvarna 555 and 562. I cover the differences in the cases and crank shafts between the small mount and large mount versions of Husqvarna's 62cc saw. Not just the cases and cranks are different, but also the side cover and bar oil components.
Also show a way to increase compression without a lathe, without decking the cylinder. Basically cut a thinner gasket as the stock one is .030" and a Popup Piston purchased off ebay. Show a muffler mod that has worked for me to add power and reduce heat retained. Some other tweaks. ALL these mods can happen without a machine shop, a $400 service charge, and most importantly without a Husqvarna dealer with CST. The finished build is in the 10 to 15 percent class stronger than the stock saw it was derived from using really basic concepts and costs time and elbow grease. Spent around $70 dollars in new parts, gaskets , popup piston from Lil' Red Barn and gasket materials.
Go back and look for the Ultimate Old Man saw and related. I take that small mount series apart and stick them back together , and it's essentially the same as a 562 so those video's are relevant as well.