#1 - A Manual will be your best friend on any kind of repair for your machine - this site will be your second best outlet for info
#2 - the 200M and ATC200ES have very different frames as the 200M is chain drive and the 200ES is shaft drive. Unfortunatly - the 1984 ATC200ES was a one year production run - your only hope is to find another 1984 ATC200ES frame - but they are plentiful
Good Luck and oh..................Welcome to the boards!
RIP - Yamahondaman!! You will never be forgotten!
RIP - Sam Brehm!! Gone but NEVER forgotten!
RIP - Sandpuppi101 - You will live on in my mind - I miss you friend!