I have a 91 Trail Boss 250. I am rebuilding the motor on it and I need the manual for torques for reassembly. I pulled the crankcase apart and need to know what type of sealant to use when putting it back together. First I need a pointer on how to get the crank case apart. I need to replace the crank shaft seals and bearings. I do not know when and if it has ever been done on this atv before and the guy i bought it off of seemed less than knowledgeable on the fourwheeler. Any help would be appreciated. I feel dumb cause I can repair and rebuild a turbine engine in two hours for my helicopter but this little two stroke is kicking my @$$.