by chopper » Fri Feb 26, 2010 7:24 pm
Slomotobug-
I have a riding friend that is in the process of doing nearly what you're thinking. He has just mounted an 05 450X engine in his 07 450R chassis. Lighter weight,less bulk, still with the button! I'll get him to post pics when its completed which should be soon.
Motosicko-
I haven't weighed it yet but it feels much lighter than the stock X. Figure the only difference from the R would be the starter motor and gears, minimal wiring to operate the starter, the button,starter relay,an Ebatt and a battery tray. If you are a rider of an R it MAY be a noticable increase but if you were use to an X it IS a noticable decrease!