first of all let me say..... I KNOW HOMELITE ENGINES"......I have been to ,,,,well let me think,,,,,,Homelite, Stihl,, McCulloch, Briggs,
way back when AMF Corp. was in small engines, Lawnboy, OMC.
oh well a BUNCH of training is under my belt. Now, as to the question as to why the cylinder was changed,,,,,ANYBODY that KNOWS Homelite can tell you that a 25cc can be upgraded to a 30cc........and that is what was done ......OK........!!!!!!!!!!!!

THIS engine is as good as ANY Ryobe floating around here.....and they are selling......as compared to a TRUE R/C aircraft engine.......well I can trot of to my small engine shop and pick up a part WITHOUT having to call some place in the desert and wait on shipping....and the parts are far more economical.....like the above post states....they just keep on running.....................

NOW..... ? ? ?