I just recently got my a12 cam reground at wade cams
i got the 446 grind has plenty of power till 6000rpm but start to drop off as i think my single weber downdraught isnt enough will be going to r1 bike carbs when i find some
it cost me $140 to get the cam reground and tappets refaced
i also got dual valve springs from
http://www.performancesprings.com.au/valvesprings.htmlcost $120 i think
i would give wade cams a go they provide excellent service