So what I have found with 026's to make them rip mod the muffler, keep it simple,get rid of the base gasket replace it with a good liquid gasket like loc tite 518 , fatten up the low speed, narrow kerf chain, 8 tooth sprocket, sharpen the chain perfectly! Also for more jam increase the width of the exhaust port give it a nice funnel shape heading out to the muffler, remember to open up the exhaust gasket and muffler opening as well and clean up any flaws in your scavenger ports! I have been very happy with the gains this way and you can do it all at home by yourself