Sheesh what's with all the negativity lately? It's been long established the cost to modify the engine would be expen$ive and likely rival the price of the bike (assuming you got it used). In other words, not worth it. The conversation had moved on or so I thought to what would it take to beef up the engine and what parts could possible be interchangeable from other engines.
I started a new thread here so no body whines about this ancient still beating that dead horse topic. 
This thread can now quietly shuffle off the mortal coil.....