Predator non hemi head

#1
Hi im new here i got 2 mini bikes im building a non hemi and have some questions i have larger stainless valves 28 25 and like to know is there a valve height to shoot for i can check the installed height of the springs , also i am replacing the roller bearings are the cheap chinese good for hi performance build thanks in advance
 
#2
What springs are you using average install height with the aftermarket aluminum retainers and keepers with the middle ring is around .830. There is a spring chart from ARC I can send you as a excel spread sheet that shows the different springs and seat pressure at xxx height. I can't copy and paste as it reformats it and is impossible to read. PM me your email and I can send it to you.
 
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