Originally Posted by pablo83
The hole in the case is able 2.5mm bigger than the 440cc sleeve. My guess it the 460cc kit takes up the entire hole. Due to some of the bolt locations, you wouldn't be able to bore out the cases much larger, maybe a couple mm's, but it would be pretty pointless.
Cool, good to know. What about people saying yoy could get 500cc out of the 350 engine?