idk why you would want to the 97-02 chassis are a dime a dozen and it would literally take a quarter of the effort i just put a 97 sx700 engine into a 2001 sxr 500 chassis all i had to do was harness swap and move the motor mounts in the pre drilled holes that just have rivets in them. then its just simple things like rear exhcnager throttle/oil/choke cables, cdi box and two coolant lines the one under the motor that goes into the pump and the coolent hose that is next to the chaincase that goes into your head. that is literally all the "mods" you have to do to put a triple in a twin chassis.