I am brand new to building bobbers, but I am determined to get my '73 tx650 bobber finished this year. I am looking to buy another xs650 that is already bobbed and finished to use as a parts bike and to sell the excess parts for payment on the new build. Will this 1981 xs650 be compatible with my 1973? I know there were minor differences made between 73-75 but I'm not sure if any would get in the way of me using the '81 as a parts bike for a bobber build... Can anyone give advice? Looking forward to being a part of this community!