Originally posted by Bxclip
hows the sirio evo II i got the mugen x12 and my cuz wanst a fast engien for his rtr ntc3 plus and the sirio is fast and cheap. is it as fast as th emugen x12? i ehard the mugen x12 is the fastest no turbo 3 port. also whats the diff between sg chaft and threaded shaft? becuase he wants the black top and its threaded but we dotn no the difference
thank you
Sirio Evo 2's only come with the new big diam. blue head with the sirio logo printed all over the head.
This engine is different than previous small head Sirio S12 in that it has more agressive sleeve and crank timing and better carb.
SG shaft is the one that has inside thread to hold clutch with Allen bolt, vs. the threaded shaft, that has the thread on the outside to hold clutch with a nut.
SG shaft is the way to go for Centax type clutch, and threaded for the standard type clutch.
AFM