If you are referring to a stock motor as in ROAR rules and regulations, the specifications are:
27 turn
fixed 24degree timing
removable end bell or fixed end bell
bushings only (no bearings)
ROAR XX must be stamped in the can (XX being the year of mfg)
the armature must have the mfg name and "27" stamped on it
Plus a whole bunch of other stuff.
If this is your question, check out
www.roarracing.com and look at the rulebook starting on page 35.