I bought a 1998 shee a year ago and finally am getting to rebuild the whole thing. I have looked alot of posts on various engine mods, but there are some I am having trouble finding any info on. I want a reliable engine build and don't want a drag racer. I can beat any other atv where I ride on my 400ex right now, just want a shee for the power band. Anyway I have seen alfew guys talk about a shift drum mod and pancake bearing install, and timing plate +4 but can not find out what it is for sure. I am about to start rebuilding my shee engine and want to do any internal mod I can to make it reliable as posible. I do alot of trail riding and some dirt road trashing but a relitively stock rebuild is all I need. Any help will be greatly apperated. God bless and have a great day.