GSPOT

iTrader: (62)

the motor from the factory is shimmed for what gas??? 20% 30%??

shrekair

iTrader: (9)

guys here are running the stock shim w/ 30% nitro.

slideyourride90

i,ve had Sirio motors in the past, and never had a problem with them, does this one have the same awesome quality and performance as its past motors, i made the mistake of getting a os .12tz for my mugen, i know its a good overall motor but i still regret getting it instead of an other Sirio,