Anything above the stage 1 Moriwaki cam will require HRC springs, HRC or replica spring-seats and Kibblewhite Ti retainers which all need to be purchased separately unless you find a set of stage 2 mori cams and mori spring/seat/retainer kit like I got here last year in the classifieds. :rockonWhat are the options out there for cams for these bikes?
Are there cams out there that make power than the stock ones on stock compression pistons?
OMFG that's expensive! I picked up an unused pair of Mori Stage 1 cams here on SZ for $350. The gains with these are small, I just got them because I was rebuilding the engine and they happened to be available.
Is there any power to be found in going with lighter valve train parts when used with the stock cam? Retainers, springs, etc
I bought a custom cam for my saleen and it was quite expensive as well so I understand the cost of these units.
Nope, but you can improve the heat dissipation from your valves if you replace the OEM valve-guides with the Kibblewhite AMCO45 ones that Damon Stewart had made and has up for sale right now.
Its unlikely that the HRC springs are any lighter than the OEM ones since they are more heavy duty to compensate for the increased duration/lift of a st2 cam profile and you cannot mix HRC springs with OEM cams.
The ti retainers are only being reproduced for HRC springs so that wouldn't do you any good with OEM cams/springs/seats.