i understand that modding the engine isnt something to do if you dont know what you do but i am curious if something is doable on my sleeve and crankshaft? if you look at my pictures. My friend told me that they allready was modded. He also told me that i can use a dremel or just polish it to change timings. This is an old engine and it woluld be fun if there was something to do about it for test purposes