hey all, I have a 1996 xr 650 L that i use as a commuting road bike. I have it converted over to street use only and intend to keep it as only a road bike. my buddy and i tore it down to the frame last night to clean it.....well, we ended up taking the head off the engine too to investigate and see some stuff....thats what alcohol and persuasion can do sometimes! Anyways, i am wanting to see what kinds of aftermarket cams everyone is using because i am going to get a new one. Also, my buddy is going to port and polish my head for me.....he is doing something different though. He is going to make the inlet side smaller so that it creates more velocity for fuel entering the combustion chamber.....same with the exhaust ports too i think.....anyone ever heard of doing this? he says that is what the top fuel bikes do??? Any comments before i let him do this? Well, if you could let me know some of the cams you guys are using (and sizes too) then i would appreciate it. I am sure i will keep posting different things about the process. Thanks for your help!