your stroke is 70mm and the rod is 124 centre to centre. the 450 liner is therefore 21mm too short and the piston would come 10+mm out the roof of the engine.
Thats what i thought then, anyway, about the electric starter on the 2002 model, was that more of a HELP start ?, I can never start the bike cold with mine, Is there any better replacement or what can be done ?